GD-336: Guidance for Accounting and Reporting of Nuclear Material

Preface

Licensees possessing nuclear material (uranium, thorium, and plutonium) are required to report their holdings, and any inventory changes, to the Canadian Nuclear Safety Commission (CNSC). CNSC uses these reports to establish a national system of accounts for nuclear material. This system of accounts helps fulfill Canada’s obligations pursuant to INFCIRC/164, Agreement Between the Government of Canada and the International Atomic Energy Agency for the Application of Safeguards in Connection with the Treaty on the Non-Proliferation of Nuclear Weapons, related safeguards agreements, and Canadian bilateral nuclear cooperation agreements.

This guidance document provides information on how the requirements set out in regulatory document RD-336 Accounting and Reporting of Nuclear Material may be met, including information on nuclear material accounting reports and request forms and detailed instructions on how to complete them. Templates for the reports and request forms are available on the CNSC Web site at nuclearsafety.gc.ca.

Contents

1.0 Introduction

This guidance document provides information on how the requirements set out in regulatory document RD-336 Accounting and Reporting of Nuclear Material may be met, including detailed instructions for completing nuclear material accounting reports and request forms. Templates for the reports and request forms are available on the CNSC Web site at nuclearsafety.gc.ca.

CNSC staff can provide additional guidance upon request; contact CNSC at info@cnsc-ccsn.gc.ca.

2.0 Nuclear Material Classification

Nuclear material is stored in material balance areas (MBAs) such that:

  1. The physical inventory of nuclear material can be determined when necessary, in accordance with specified procedures, so the material balance for International Atomic Energy Agency (IAEA) safeguards purposes can be established; and
  2. The quantity of nuclear material in each transfer into and out of MBAs can be determined.

For the purposes of accounting and reporting, nuclear material is divided into the following groups:

  1. Group 1 material is uranium, plutonium, and thorium that has reached the stage in the nuclear fuel cycle where it has a composition and purity suitable for fuel fabrication or isotopic enrichment;
    1. Group 1A material requires detailed and regular nuclear material accounting and reporting to CNSC;
      Retained waste is a specific type of Group 1A material that has been identified as unrecoverable and is subject to less stringent accounting and reporting requirements than other Group 1A nuclear material;
    2. Group 1B material has been temporarily exempted from detailed nuclear material accountancy. Exempted material is expected to be re-classified as Group 1A material when the conditions for Group 1B material are no longer met; and
  2. Group 2 material contains natural uranium or natural thorium, including ores and ore concentrates, that has not reached the stage in the nuclear fuel cycle where it has a composition and purity suitable for fuel fabrication or isotopic enrichment.

Licensees may possess a combination of material groups.

3.0 General Accounting and Reporting Guidance

Supplementary information for specific reports and forms is provided in Sections 3.0 General Accounting and Reporting Guidance and 4.0 Nuclear Material Accounting Reports. Section 6.0 Data Element Descriptions and Instructions provides detailed instructions for completing the data elements for the reports and forms available on the CNSC Web site at: nuclearsafety.gc.ca.

3.1 Report Entries

Nuclear material accounting provides licensee information from source records in the form of data elements. Data elements are units of information, such as codes, dates, and weights.

Data elements are identified by labels that are unique three- or four-digit numbers used to report the data elements to IAEA in the format specified in the Canada / IAEA Safeguards Agreements INFCIRC/164. A listing of the labels and data elements used in accounting reports is provided in Section 6.1 General Information.

3.1.1 Batches

All changes to inventory of nuclear material are reported on the basis of a batch quantity of nuclear material in the reporting MBA.

A batch is a portion of nuclear material handled as a unit for accounting purposes at a key measurement point. A batch consists of one or more items that:

  1. Are located in the same physical-key measurement point (P-KMP) within the MBA;
  2. Have the same physical and chemical characteristics; and
  3. Have the same enrichment status (i.e., for enriched uranium, are all low-enriched (< 20%) or all high-enriched (≥ 20%)).

The nuclear material may be in bulk form or contained in a number of separate items.

3.2 Weight Units and Rounding

Rounding can lead to discrepancies. For this reason, individual weights should not be rounded. Where sums of weights are reported (e.g., List of Inventory Items), the sums can be rounded but only after the summation.

In order to minimize discrepancies, the full numeric value (that is, the integer and decimal portions of the weights) should be reported in the same way, to the same number of decimal places to the right of the decimal point for all reports pertaining to that reported weight. This is particularly important for the final balances of the General Ledger, the Physical-KMP Inventory Summary and the Reconciliation Statements in a given material balance period.

Weights must be reported to at least one decimal place to the right of the decimal point in the corresponding weight unit (see Table A13: Material Group Element Codes and Labels and Table A14: Isotope Codes and Labels for Group 1 Material. Weights may be reported up to six decimal places to the right of the decimal point).

In some special cases, and with the agreement of CNSC staff, weights may be reported to the nearest integer. An example of a situation where this might be acceptable to CNSC is when reporting large bulk quantities where measurements to one decimal place to the right of the decimal point or greater are not technically achievable.

3.3 Reporting of Foreign Obligations

When nuclear material is imported into Canada under a Nuclear Cooperation Agreement it is subject to foreign obligations. These foreign obligations include the requirement to track and report on the obligated material.

At the time an import/export licence is issued, CNSC informs the licensee, in writing, if the material is subject to foreign obligations. Foreign obligation codes are provided by CNSC on the import/export licence to assist in tracking and reporting the foreign obligation. This is typically done at the time of issuance of an import/export licence, but may occur at any other time. Where there has been no such notification by CNSC, the material in question is considered unobligated.

3.4 Reporting of Corrections to Inventory Changes

All corrections to a previously submitted inventory change are initially reported in the Inventory Change Document (see Section 4.1 Inventory Change Document), followed by the General Ledger (see Section 4.2 General Ledger).

If any errors are discovered in a previous submission, the licensee submits a corrected report and identifies it as a revision. Reporting a correction to a previously submitted report should be done as soon as the error is realized by the licensee. On the correcting report, use the date that the correction was made.

Individual records should be maintained using the “by difference correction” principle (BDCP). Using BDCP, accounting for corrections to data elements reports the difference(s) between the corrected weight(s) and the original weight(s) and is based on the date when the correction is applied. The original entry does not get deleted; the correction is a new report.

When reporting a correction to a previously reported element or isotope weight, the correcting Inventory Change Document reports three values, each on a separate line:

  1. Corrected weight;
  2. Original weight; and
  3. Weight difference.

The weight difference is referenced to the original value or to the previously reported correction as applicable.

The difference between the original record and the correcting record is recorded on the General Ledger. The correction is referenced to the line entries of the original transaction reported or to the previously reported correction, as applicable.

4.0 Nuclear Material Accounting Reports

4.1 Inventory Change Document

An inventory change is an increase or decrease of nuclear material.

A template for an Inventory Change Document is available on the CNSC Web site at: nuclearsafety.gc.ca. For instructions on how to complete individual labels, see Section 6.0 Data Element Descriptions and Instructions.

Inventory changes include:

  1. Accidental gain;
  2. Accidental loss;
  3. Category change;
  4. De-exemption use;
  5. De-exemption quantity;
  6. Exemption use;
  7. Exemption quantity;
  8. Inventory difference;
  9. Measured discard;
  10. Nuclear loss;
  11. Nuclear production;
  12. Receipt domestic;
  13. Receipt foreign;
  14. Receipt from non-safeguarded activity;
  15. Receipt at starting point;
  16. Re-batching – decrease in batch content;
  17. Re-batching – increase in batch content;
  18. Retained waste – transfer to;
  19. Retained waste – transfer from;
  20. Rounding differences;
  21. Shipment domestic;
  22. Shipment foreign;
  23. Shipment to non-safeguarded activity;
  24. Shipper-receiver difference; and
  25. Termination of safeguards.

Inventory changes are reported to CNSC on an Inventory Change Document. An Inventory Change Document reports only one batch and one inventory change code per batch, except in a few accounting cases related to internal inventory changes. These accounting cases are discussed in Section 4.1.3 Internal Inventory Changes.

A single physical transfer of nuclear material is not necessarily a single inventory change. It could be several inventory changes depending upon the number of batches of nuclear material being transferred. For example, if a natural uranium dioxide fuel bundle and a drum of natural uranium dioxide powder were transferred together from one MBA to another MBA, this would be one physical transfer of nuclear material but two inventory changes and reported on two separate Inventory Change Documents.

4.1.1 International Shipments/Receipts and Foreign Obligation Tracking

International shipments/receipts are reported on two original Inventory Change Documents. The shipper/receiver retains one for their records and sends one to CNSC.

For imports and exports, foreign obligated material information is reported to CNSC, identifying the country(ies) by the foreign obligation country code(s) for each country of origin and the obligated material weights.

For exports, if the nuclear material will not be subject to IAEA safeguards in the recipient country it is expected that the shipper will submit acknowledgement of receipt, obtained from the foreign receiver, no later than two months after receipt of the material by the recipient.

4.1.2 Domestic Shipments/Receipts and Foreign Obligation Tracking

These inventory changes are reported on five original Inventory Change Documents. The shipper retains one for their records, sends one to CNSC, and sends three to the receiver. The receiver acknowledges receipt of the material by completing and signing the three Inventory Change Documents, retaining one for their records, returning one to the shipper and submitting one to CNSC.

For domestic shipments of nuclear material with foreign obligation(s), the shipper notifies the receiver of the foreign obligations, at which point the receiver assumes responsibility for tracking and reporting that obligated material to CNSC. Obligated material information is reported, identifying the country(ies) by the foreign obligation country code(s) for each country of origin and the obligated material weights.

4.1.3 Internal Inventory Changes

Internal inventory changes are initiated by the reporting MBA, and only affect that MBA. These inventory changes include exemption and de-exemption from safeguards, category changes, nuclear loss and production, shipper-receiver differences, re-batching, accidental gains and losses, measured discard, retained waste transfers, and rounding.

The following internal inventory changes are special accounting cases:

  1. Category changes;
  2. Re-batching;
  3. Shipper-receiver differences; and
  4. Retained waste transfers.

These cases involve either multiple batches reported with the same inventory change code on one Inventory Change Document, or one batch undergoing two or three inventory changes in one transaction. They are described in further detail below.

4.1.3.1 Category Changes

The categories for uranium are natural, enriched, and depleted. During processing or use, uranium may change from one category to another. Category changes occur through:

  1. Blending different categories of uranium;
  2. Enrichment;
  3. Depletion; and
  4. Burn-up.

Category changes decrease the inventory of one element category and increase the other.

Attention should be paid to the units of weights reported. For example, the weight of natural uranium is reported in kilograms and the weight of enriched uranium is reported in grams. To avoid a rounding difference, report the unrounded weight of natural uranium in kilograms, to at least three decimal places, which will convert to whole grams of enriched uranium.

4.1.3.2 Re-batching

The process of re-batching is used to report changes in the physical batch structure or a change in the unique identifier of the batch.

This inventory change is reported when:

  1. A batch is divided into two or more batches, for example, to separate out a part of a batch for separate treatment;
  2. Two or more batches of the same material type are combined into one batch; and
  3. The material description code (MDC) changes due to a configuration change of the items, for example, bundles disassembled into individual fuel elements, or cementing of waste.

The increases and decreases in batch content resulting from re-batching are reported simultaneously in separate entries. Since these entries are of equal value and opposite sign, they do not change the total inventory.

Examples of batch changes that are not reported as re-batching are:

  1. Re-naming a batch upon receipt from an outside shipper;
  2. Irradiation of material that generates nuclear loss or nuclear production or category changes;
  3. Batch changes during processing at bulk handling facilities; and
  4. Extraction of small samples from large batches for analysis.
4.1.3.3 Shipper-Receiver Differences

All receipts are reported using the element/isotope weights as provided by the shipper.

If the receiving MBA measures the received batch and the measurement results are different from the shipper’s weights, the receiver reports the difference as a shipper-receiver difference.

The shipper-receiver difference is the shipper’s weight minus receiver’s weight.

The Inventory Change Document reporting the shipper-receiver difference has the same batch name as reported for the original.

4.1.3.4 Retained Waste Transfers

Nuclear material that has been identified as unrecoverable and stored in the MBA can be transferred to retained waste upon approval of CNSC. After transfer, the only reporting requirement is to provide an inventory listing upon request. Retained waste is kept physically separate within the MBA. It is first returned to the regular Group 1A nuclear material inventory before it is transferred out of the MBA.

4.2 General Ledger

A General Ledger is a monthly listing of all inventory changes occurring during that month. It provides a running balance of the material in the MBA.

A template for a General Ledger is available on the CNSC Web site at: nuclearsafety.gc.ca. For instructions on how to complete individual labels, see Section 6.0 Data Element Descriptions and Instructions.

A General Ledger is submitted for each element and isotope in the MBA, reporting all inventory changes that occurred during the month. Before submitting a General Ledger, the licensee should ensure that the:

  1. Opening balance of a General Ledger is identical to the ending balance of the previous General Ledger;
  2. Weights reported on each line of the General Ledger are identical to the weights reported on the corresponding Inventory Change Document;
  3. A running balance is clearly identified; and
  4. Ending balance of the General Ledger is clearly identified.

If a physical inventory taking (PIT) is conducted on the last day of a reporting month, then only one General Ledger is required for that month. In all other cases when a PIT is conducted, two General Ledgers are required. The first general ledger reports transactions from the first day of the month up to and including the date of the PIT (as of 2400 hours on this date). The second General Ledger reports transactions from the day after the PIT up to and including the last day of the month.

If there are no inventory changes in a given month, a null General Ledger is still submitted. A null General Ledger requires an opening and ending balance.

It is recommended that General Ledgers be maintained for each foreign obligation country for Group 1A and Group 2 material.

4.3 Summary of Inventory Changes

A Summary of Inventory Changes shows the total number of transactions for each inventory change code for a corresponding month.

A template for a Summary of Inventory Changes is available on the CNSC Web site at: nuclearsafety.gc.ca. For instructions on how to complete individual labels, see Section 6.0 Data Element Descriptions and Instructions.

The Summary of Inventory Changes is submitted monthly, with the corresponding General Ledger. The information for an inventory change recorded on the Summary of Inventory Changes is consistent with the information reported on the corresponding General Ledger.

A Summary of Inventory Changes is submitted to CNSC for each element and isotope. Before submitting the summary the licensee should ensure that the:

  1. Reporting period for the Summary of Inventory Changes is the same as the corresponding General Ledger;
  2. Opening balance of the Summary of Inventory Changes is identical to the ending balance of the previous Summary of Inventory Changes report;
  3. Number of each type of inventory change is equal to the number of Inventory Change Documents reported for that inventory change type, including corrections;
  4. Weights are reported to the same number of decimal places as reported on the corresponding General Ledger balances;
  5. Totals of all the weight increases and decreases are clearly identified;
  6. Ending balance of the Summary of Inventory Changes is the total of the weights of the opening balance plus all of the inventory changes; and
  7. Ending balance of the Summary of Inventory Changes is clearly identified.

If a PIT is conducted on the last day of a reporting month then only one Summary of Inventory Changes is required for that month. In all other cases when a PIT is conducted, two Summary of Inventory Changes are required, as per the corresponding General Ledger.

4.4 List of Inventory Items

A List of Inventory Items reports each material item for each element/isotope in each Group 1A or 1B nuclear material present in the MBA.

A template for a List of Inventory Items is available on the CNSC Web site at: nuclearsafety.gc.ca. For instructions on how to complete individual labels, see Section 6.0 Data Element Descriptions and Instructions.

4.4.1 Group 1A Material

The List of Inventory Items is compiled for each element/isotope, as of 2400 hours on the PIT date, and is sorted by P-KMP and MDC, in a consecutively numbered sequence to avoid double counting or omissions. Before submitting a List of Inventory Items, the licensee should ensure that:

  1. Individual items are reported. If the number of items in the inventory is very large, the items may be grouped into a batch and the number of items in the batch is reported; and
  2. The element and isotope weight of each item or batch on the List of Inventory Items is reported in unrounded numbers.

It is recommended that items with the same P-KMP and MDC be sub-totalled on the List of Inventory Items.

4.4.2 Group 1B Material

The List of Inventory Items for Group 1B material is submitted annually. Separate lists should be prepared for material that has been exempted on the basis of use and quantity.

4.5 Physical-Key Measurement Point Inventory Summary (P-KMPIS)

The P-KMPIS is a summary roll-up of batches of items listed on the List of Inventory Items, for each element/isotope with the same MDC and stratum. In consultation with CNSC, MBAs that have only a few items of inventory are not required to submit the P-KMPIS.

A template for a P-KMPIS report is available on the CNSC Web site at: nuclearsafety.gc.ca. For instructions on how to complete individual labels, see Section 6.0 Data Element Descriptions and Instructions.

The final total of the P-KMPIS for each element/isotope is rounded to the same number of decimal places as the ending balance for that element/isotope as recorded on the General Ledger.

A P-KMPIS is not required for retained waste, Group 1B, or Group 2 material.

4.6 Obligated Material Inventory Summary

The Obligated Material Inventory Summary shows the opening and ending balances for a calendar year, by country of foreign obligation, for each Group 1A and Group 2 element/isotope at the licensee’s premises.

A template for an Obligated Material Inventory Summary report is available on the CNSC Web site at: nuclearsafety.gc.ca. For instructions on how to complete individual labels, see Section 6.0 Data Element Descriptions and Instructions.

In addition to submitting nuclear material accounting reports for Group 1A and Group 2 material, Canada is required to submit other annual reports on foreign obligated material held within Canada.

Before submitting an Obligated Material Inventory Summary, the licensee should ensure that:

  1. In cases where the licensee has no foreign obligated material or for a new country of obligation, opening balances are set at “0” (zero); and
  2. The ending balances for each obligated element/isotope are derived from the ending balances from the General Ledgers for each obligated material element.

Throughout the year, the licensee is expected to maintain a record of the balance of foreign obligated material and this information is provided to CNSC upon request.

4.7 Reconciliation Statement

The Reconciliation Statement, prepared at the time of a PIT, shows the book adjusted ending, the physical inventory, and the difference between them for each element/isotope.

A template for a Reconciliation Statement is available on the CNSC Web site at: nuclearsafety.gc.ca. For instructions on how to complete individual labels, see Section 6.0 Data Element Descriptions and Instructions.

A Reconciliation Statement indicates for each element/isotope:

  1. Book adjusted ending (BA) transcribed from the ending balance of the General Ledger;
  2. Physical ending (PE) transcribed from the P-KMPIS; and
  3. Inventory difference (ID = BA – PE).

Any resulting non-zero inventory difference is reported on an Inventory Change Document.

4.8 Request Forms to Re-classify Nuclear Material

Under certain circumstances, in order to comply with the safeguards agreement, the status of the nuclear material must be changed. Prior to the licensee completing any such transaction, a request for approval for re-classification of the material is made by completing the appropriate request form and submitting it to CNSC.

Re-classification of Group 2 nuclear material is not applicable.

4.8.1 Request for Exemption

An exemption temporarily exempts material from Group 1A reporting requirements. The Request for Exemption provides information about the nuclear material, its location(s), and intended use.

A template for a Request for Exemption is available on the CNSC Web site at: nuclearsafety.gc.ca.

4.8.1.1 Request for Exemption Process

There are two bases under INFCIRC/164 for exempting Group 1A material: on the basis of its non-nuclear use (Article 36), and on the basis of quantity (Article 37). The steps for the request process are:

  1. Licensees request an exemption by completing a Request for Exemption;
  2. If CNSC’s preliminary determination is that the nuclear material may qualify for exemption, then a request is made to IAEA on the licensee’s behalf with a tracking identifier; and
  3. CNSC informs the licensee of IAEA’s decision and the tracking identifier (if approved).

If the request is denied, the nuclear material remains Group 1A material.

Upon review, CNSC or IAEA may change the basis of the request. In this case, the licensee will be informed of the new basis.

4.8.1.2 Instructions for Completing a Request for Exemption

The following information is provided for a Request for Exemption:

  1. Facility name and address, MBA code, contact name, telephone, and fax numbers;
  2. Article under which the exemption is requested;
  3. Reason for request;
  4. Intended use of exempted material;
  5. The element to be exempted;
  6. The element weight, in either grams or kilograms, and, for enriched uranium, the isotope weight in grams;
  7. Present physical and chemical form of the material to be exempted, as well as the batch name and the MDC;
  8. Intended physical and chemical form of the exempted material, and the MDC;
  9. If the material will be physically moved out of the MBA, the date and location where the exempted material will be transferred;
  10. Requested date for the exemption to take effect;
  11. Destination of exempted material (name and address, MBA code if applicable); and
  12. Licensee authority name, signature, and date.
4.8.1.3 Accounting for Exemptions

Exemptions are implemented by:

  1. Reporting via an Inventory Change Document for each exemption, including the tracking identifiers;
  2. Entering the exemption into the General Ledger for Group 1A material; and
  3. Entering the exemption into the General Ledger for Group 1B material.

4.8.2 Request for De-exemption

A de-exemption returns Group 1B material within an MBA to Group 1A status. Licensees submit a request for de-exemption for use or quantity.

A template for a Request for De-exemption is available on the CNSC Web site at: nuclearsafety.gc.ca.

Group 1B material is de-exempted before being exported, irradiated, or terminated, or being processed or stored with Group 1A material. Upon de-exemption, the material is once again considered Group 1A material.

Some exceptions are permitted for export of Group 1B material when it temporarily leaves Canada but does not change ownership; for example, for depleted uranium that is part of a shielded shipping container, or for material that is part of a device or instrument that is being exported for repairs.

4.8.2.1 Request for De-exemption Process

The steps for the request process are:

  1. Licensees request a de-exemption by completing a Request for De-exemption;
  2. If CNSC’s preliminary determination is that the nuclear material may qualify for de-exemption, then a request is made to IAEA on the licensee’s behalf with a tracking identifier; and
  3. CNSC informs the licensee of IAEA’s decision and the tracking identifier (if approved).

If the request is denied, the nuclear material remains Group 1B material (exempted).

4.8.2.2 Instructions for Completing a Request for De-exemption

The following information is provided for a Request for De-Exemption:

  1. Facility name and address, MBA code, contact name, telephone, and fax numbers;
  2. The Article under which the original exemption was granted; the basis of the de-exemption must be the same as the basis for the original exemption;
  3. Batch name of the material when originally exempted;
  4. The tracking identifier provided by CNSC when the material was re-classified as Group 1B, if known;
  5. Location from where the exempted material was transferred from, including the licensee’s name and/or MBA code, and address;
  6. A brief explanation for why de-exemption for the material is being requested, for example, to export or process material, or to store with other material subject to safeguards;
  7. Indicate the element/isotope, as applicable, of the nuclear material to be de-exempted: natural uranium, depleted uranium, enriched uranium (uranium-233, uranium-235), thorium, or plutonium;
  8. Element weight of the material in the required units (grams or kilograms) and, for enriched uranium, the isotope weight in grams;
  9. Description of the present physical and chemical form of the material to be de-exempted, and give the MDC;
  10. Approximate date when Group 1A status will be re-applied for the material; and
  11. Licensee authority name, signature, and date.
4.8.2.3 Accounting for De-exemptions

De-exemptions are implemented by:

  1. Reporting via an Inventory Change Document for each de-exemption, including the tracking identifier;
  2. Entering the de-exemption into the General Ledger for Group 1B material; and
  3. Entering the de-exemption into the General Ledger for Group 1A material.

4.8.3 Request for Termination

Accounting and control can be terminated on Group 1A material when it is determined that the material has been consumed or has been diluted in such a way that it is no longer usable for any nuclear activity or has become, in practice, irrecoverable.

A template for a Request for Termination is available on the CNSC Web site at: nuclearsafety.gc.ca.

The completed Request for Termination form provides information about the nuclear material, its location(s), and intended non-nuclear use. This information forms the basis of the submission by CNSC to IAEA for approval to terminate from IAEA safeguards. There are two bases under INFCIRC/164 for terminating IAEA safeguards: on the basis of the material having been consumed or diluted in such a way that it is no longer usable for any nuclear activity (Article 11), and on the basis of the material having become “practically irrecoverable” (Article 13).

4.8.3.1 Request for Termination Process

The steps for the request process are:

  1. Licensees request a termination by completing a Request for Termination;
  2. If CNSC’s preliminary determination is that the nuclear material may qualify for termination, then a request is made to IAEA on the licensee’s behalf; and
  3. CNSC informs the licensee of IAEA’s decision.

If the request is denied, the nuclear material remains Group 1A material.

Upon review, CNSC or IAEA may change the basis (Article) under which termination is requested. In this case, the licensee will be informed of the new basis.

4.8.3.2 Instructions for Completing the Request for Termination

The following information is provided for a Request for Termination:

  1. Facility name and address, MBA code, contact name, telephone, and fax numbers;
  2. Article under which termination is requested;
  3. Explanation for why termination for this material is requested;
  4. Batch name of the material to be terminated;
  5. Element/isotope (as applicable) of the nuclear material to be terminated;
  6. Element weight of the material in the required units, and for enriched uranium, the isotope weight in grams;
  7. Description of the present physical and chemical form of the material and the MDC;
  8. Present use of the material and description of the containment as appropriate;
  9. Reason the nuclear material will be practicably irrecoverable;
  10. Requested date of termination;
  11. Destination of material (name and address, MBA code if applicable);
  12. Approximate date of transfer out of the MBA, if applicable; and
  13. Licensee authority name, signature, and date.
4.8.3.3 Accounting for Terminations

Terminations are implemented by:

  1. Reporting the termination via an Inventory Change Document for each material;
  2. Entering the Inventory Change Document transaction into the General Ledger as Group 1A material; and
  3. Where the terminated material contains plutonium, high enriched uranium or uranium-233, report any subsequent transfer out of the MBA via an Inventory Change Document.

Nuclear material for which a termination has been granted is not reported on the List of Inventory Items.

5.0 Reporting Frequency

Table 1, Reporting Frequency is reprinted from RD-336 Accounting and Reporting of Nuclear Material. It details the reporting frequency for the required reports and forms that must be submitted to CNSC. The frequency of submissions may be extended upon approval from CNSC.

Table 1: Reporting Frequency
Reports and Requests RD-336 Section Reporting Frequency
Group 1 Group 2
1A 1B
Inventory Change Document 6.1 Next business day following transaction Next business day following transaction Next business day following transaction
General Ledger 6.2 By the seventh business day after the end of the reporting month Upon request by CNSC Not required
Split General Ledger 6.2 First report: seven business days after a Physical Inventory Taking (PIT) is conducted Upon request by CNSC Not required
Second seventh business day after the end of the reporting month Upon requereport: by thest by CNSC
Summary of Inventory Changes 6.3 Required with every corresponding General Ledger Not required Not required
Split Summary of Inventory Changes 6.3 Required with every corresponding split General Ledger in month of a PIT Not required Not required
List of Inventory Items 6.4 Required seven business days after a PIT (for retained waste upon request by CNSC) Annually and upon request by CNSC Not required
P-KMP Inventory Summary 6.5 Required with the corresponding List of Inventory Items above With the List of Inventory Items above (this and the List of Inventory Items may be the same report) Not required
Obligated Material Inventory Summary 6.6 Annually on January 31st and upon request by CNSC Not required Annually on January 31st and upon request by CNSC
Reconciliation Statement 6.7 Required seven business days after a PITReporting Frequency table footnote 1 Not required Not required
Request For Exemption 6.8.1 CNSC approval required prior to exempting any material from safeguards Not applicable Not applicable
Request For De-exemption 6.8.2 Not applicable CNSC approval required prior to reapplying any material to safeguards Not applicable
Request for Termination of Safeguards 6.8.3 CNSC approval required prior to terminating any material from safeguards Not applicable Not applicable

6.2 Instructions for Completing Reports

In this section, instructions are given for completing each label. Additional information for the completion of some specific reports has been included. See Appendix A for the reference tables containing the required codes.

Label Data Element Description and Instructions

001
Reference number

For CNSC use only.
002
Entry number/total number of entries

For CNSC use only.
003
Report date

Provide the date when the report was produced in the format yyyy/mm/dd.
006
Encoder’s name

For CNSC use only.
010
Report type

For CNSC use only.
015
Reporting period

General Ledger
Provide the following dates:
  1. FROM: the date of the first day of the ledger, usually the first day of the month, for the beginning balance, in the format yyyy/mm/dd; and
  2. TO: the date of the last day of the period, usually the last day of the month, for the ending balance, in the format yyyy/mm/dd.
If a PIT is conducted on the last day of a reporting month, then only one General Ledger is required for that month. In all other cases when a PIT is conducted, two General Ledgers are required. The first general ledger reports transactions from the first day of the month up to and including 2400 hours of the date of the PIT. The second General Ledger reports transactions from the day after the PIT up to and including the last day of the month.

Summary of Inventory Changes (Group 1A Material)

Provide the same beginning and ending dates as reported on the corresponding General Ledger.

List of Inventory Items, P- KMP Inventory Summary,
and Reconciliation Statement Provide the date of the PIT using the format yyyy/mm/dd.

Obligated Material Inventory Summary Provide the following dates:
  1. FROM: the first day of the period, usually the first day of the calendar year, in the format yyyy/mm/dd; and
  2. TO: the last day of the period, usually the last day of the calendar year, in the format yyyy/mm/dd.
099
Concise note reference

For CNSC use only.
207
Facility code

This label is used in all reports except the Inventory Change Document
Provide the appropriate code for the reporting facility. Facilities reporting Group 1 material are listed in Table A1: Group 1 Facility Codes. Locations outside facilities (LOF) reporting Group 1 material are listed in Table A2: Group 1 Locations Outside Facilities Codes.
307
Material balance area code

This label is used in all reports except the Inventory Change Document
Provide the appropriate MBA code.

MBAs possessing and reporting Group 1 materials are listed in Table A1: Group 1 Facility Codes.

Locations outside facilities possessing and reporting Group 1 material are listed in Table A2: Group 1 Locations Outside Facilities Codes.

MBAs possessing and reporting Group 2 material are listed in Table A3: Group 2 Material Balance Area Codes.

309
Entry status and cross-reference code

Inventory Change Document
Indicate whether the entry is new, a correction, an addition or a deletion. Provide the appropriate code from Table A4: Entry Status Codes.
310
State accounting system record identification

For CNSC use only.
370
From

Inventory Change Document
This label identifies the shipper of the nuclear material or, in cases of internal inventory changes, the MBA/LOF reporting the inventory change.

Provide the MBA/LOF/country using the applicable table:
  1. Table A1: Group 1 Facility Codes;
  2. Table A2: Group 1 Locations Outside Facilities Codes;
  3. Table A3: Group 2 Material Balance Area Codes; or
  4. Table A5: Country Codes (for imports).
For licensees who do not have an MBA code, provide the company name instead. This applies to transactions involving Group 1B material.

General Ledger
Provide the same code as reported on the corresponding Inventory Change Document.
372
To

Inventory Change Document

This label identifies the receiver of nuclear material or, in cases of internal inventory changes, the MBA/LOF reporting the change.

Provide the appropriate MBA/LOF/country code:
  1. Table A1: Group 1 Facility Codes;
  2. Table A2: Group 1 Locations Outside Facilities Codes;
  3. Table A3: Group 2 Material Balance Area Codes; or
  4. Table A5: Country Codes (for exports).
For licensees who do not have an MBA code, provide the company name instead. This applies to transactions involving Group 1B material.

General Ledger
Provide the same code as reported on the corresponding Inventory Change Document.
390
Concise note indicator

For CNSC use only.
391
Concise note text

For CNSC use only.
407
Key measurement point code (flow or physical)

For this label there are two fields to complete, one for the shipper and one for the receiver.

Flow-key measurement point (F-KMP) and physical-key measurement point (P-KMP) codes are specified by CNSC.

Inventory Change Document
Provide the appropriate code:
  1. For transfers between MBAs,
    1. Shipper of nuclear material provides the F-KMP code for the shipment in label 407 under the shipper’s name, and
    2. Receiver of nuclear material provides the F-KMP code for the receipt in label 407 under the receiver’s name;
  2. For internal inventory changes provide the F-KMP in the shipper ’s field; and
  3. For re-batching, provide the physical-key measurement point (P-KMP) code instead of the F-KMP code.

General Ledger
Provide the F-KMP code or the P-KMP code, as reported on the Inventory Change Document.

List of Inventory Items
Provide the P-KMP code where the item resides at the date of the PIT.

Physical-Key Measurement Point Inventory Summary (P-KMPIS)
List each P-KMP for the reporting MBA.
411
Type of inventory changes

Provide the appropriate code from Table A6: Inventory Change Codes or Table A7: Inventory Change Codes for Entry Status U.

Inventory Change Document
For shipments/receipts, the shipper and receiver each provide the applicable inventory change code, in the appropriate field.
For internal inventory changes, the initiating MBA provides the applicable code in the shipper’s field.

Internal inventory changes are reported as follows:
  1. Category changes
    Report the two element categories on one Inventory Change Document on separate line entries. For low (element L) or high (element H) enriched uranium, the inventory change code is NE;
  2. Changes due to re-batching
    Report using separate Inventory Change Document reports with the same transaction date; and
  3. Shipper-receiver differences
    Shipper-receiver differences (DI) can be reported for both foreign and domestic receipts and only apply to weights (not to the number of items). The DI label 446 must be the same as the label 446 in the original ICD receipt. A DI only relates to one receipt. If the receiver measures a greater element and/or isotope weight than that reported by the shipper, the DI is reported with a negative sign. The opposite holds true for a decrease.

General Ledger
On each line, provide the inventory change code for the transaction as reported on the corresponding Inventory Change Document.

Summary of Inventory Changes
Provide each inventory change code reported during the reporting period on a separate line.
412
Date of inventory change

Provide the date, in the format yyyy/mm/dd, on which the inventory change occurred or was established. If the entry is a correction to a previously reported inventory change, provide the date that the correction was made.

Inventory Change Document
Use the shipper field for shipments and internal inventory changes and corrections.
Use the receiver field for receipts.

General Ledger
Enter the date reported on the Inventory Change Document, in the format yyyy/mm/dd.
430
Material description code (MDC)

This label consists of a four character code indicating the:
  1. Physical and chemical form;
  2. Type of container; and
  3. Irradiation status of the material.
Provide the code using Table A9: Material Description Codes.

Inventory Change Document
The domestic shipment of a given batch from one MBA and its receipt in another MBA is reported with the same MDC.

List of Inventory Items
Provide the MDC for each item or group of items.

P-KMP Inventory Summary
Provide the MDC for each batch. A batch has only one code.
435
Operator’s material description code

Licensees may reference their own code.
436
Chemical and physical description

Inventory Change Document
Provide a textual description of the batch of material reported on the Inventory Change Document. Use a maximum of 100 characters.
446
Batch name (receiver/internal inventory changes)

The batch name is provided in alphanumeric format, up to a maximum of 16 characters.

Inventory Change Document
This label is used for reporting batch names related to receipts and internal inventory changes.

When reporting a receipt, the batch name can be either one assigned by the receiver or the same one used by the shipper as reported in label 447.

If the inventory change code in label 411 is “DI” (shipper/receiver difference), the batch name is the same as that reported for the original ICD receipt.

General Ledger
Provide the name of the batch given on the Inventory Change Document.

List of Inventory Items
Items with the same MDC/stratum and in the same P-KMP are expected to be grouped into batches. Where this is not possible, each item is assigned a batch name.

P-KMPIS For each P-KMP, provide the batch names listed on the List of Inventory Items.
447
Shipper’s batch name

The batch name is provided in alphanumeric format, up to a maximum of 16 characters.

Inventory Change Document
This label is used for reporting batch names related to shipments.

For imports, provide the foreign shipper’s batch name or provide the keyword “unknown”.

In the case of multiple batch names, provide the keyword “multiple” and attach a list of the batch names to the Inventory Change Document.

General Ledger Provide the name of the batch(es) given on the Inventory Change Document.
469
Measurement basis code

Provide the appropriate measurement basis (MB) code using Table A10: Measurement Basis Codes.

Inventory Change Document
This label has two fields to complete, one for the shipper and one for the receiver.
Provide the MB code in the “Shipper” field for:
  1. An internal inventory change that decreases the material balance; and
  2. A shipment of material (export and domestic).
Provide the MB code in the “Receiver” field for:
  1. An internal inventory change that increases the material balance; and
  2. Receipt of material (export and domestic).

List of Inventory Items and P-KMPIS
Provide the appropriate MB code using Table A10: Measurement Basis Codes.
470
Numbers of items in batch

Inventory Change Document
Provide the number of items involved in the inventory change. If there is more than one line entry, also provide the total number of all items reported.

General Ledger
Provide the total number of items as reported on the Inventory Change Document.

List of Inventory Items
If more than one item is included on the line entry, provide the total number of items. In the case of bulk material, and generally when a number would not be meaningful, the number “1” should be placed in label 470. The label cannot be left blank.

P-KMP Inventory Summary
Provide the total number of items for each Batch of items reported from the List of Inventory Items, in each assigned batch name.
600
Element weight - unified uranium

All reports
Report the element weight of each category of nuclear material in the batch. The individual numeric labels for this data element are in Table A13: Material Group Element Codes and Labels.

Refer also to Section 3.2 Weight Units and Rounding.

Inventory Change Document
If applicable, provide the element weight of the item subdivided by countries of origin (see label 2003).

Category Changes require reporting of two material elements and their respective weights on one Inventory Change Document on separate line entries: the weight of the first element (prior to the irradiation) is reported on the first line; and the weight of the second element (transformed) is reported on the second line, with the same weight as the first.

Special attention should be given to reporting the same number of decimal places and the same units for both element weights on the Inventory Change Document. When the two elements normally have different weight units, the units of both should be those of the highest category element (i.e., grams for enriched uranium or plutonium).

General Ledger
Provide the element weight(s) of each material element, exactly as reported on the corresponding Inventory Change Document.

Increases in element weight: Beginning on line “1”, provide the element weight of the increase, exactly as reported on the corresponding Inventory Change Document

Decreases in element weight: Beginning on line “1”, provide the element weight of the decrease, exactly as reported on the corresponding Inventory Change Document.
The General Ledger running balance must retain the same number of decimal places as the previous line entry running balance.

Summary of Inventory Changes
Provide the total weight reported for each IC code and sum the total increases and decreases.

List of Inventory Items
The weights of individual items on the List of Inventory Items are unrounded, and up to six decimal places may be used.

P-KMP Inventory Summary
Provide the sum of the element weights of all items on the List of Inventory Items, grouped into batches with the same MDC and stratum. Maintain decimal accuracy, and the batch total may then be rounded to the agreed number of decimal places used on all other reports.

Reconciliation Statement
The element weights for book adjusted ending (BA) are taken from the ending balance of the General Ledger Report of the PIT month.

The element weights for physical ending (PE) are taken from the totals of each element balance at PIT closing, as reported on the P-KMPIS.
See Table A11: Reporting Codes for Reconciliation Statement. The weights should be reported to the same rounded number of decimal places as on the General Ledger and P-KMPIS reports.

Reporting L and H codes within Table A13: Material Group Element Codes and Labels requires consultation with CNSC staff.

Obligated Material Inventory Summary
The licensee is required to report the inventory changes via Inventory Change Document reports for specified transactions of obligated material. From records of these Inventory Change Document transactions, the licensee is expected to maintain foreign obligated material transaction ledgers for each obligation country, in its source records for each reporting period.

The opening balances for each element weight, for each obligation country, are taken from the ending balances of the ledgers from the previous reporting period.

The first time a country of obligation is reported on a List of Inventory Items for an element/isotope, the opening balance for that material is “0” (zero).The ending balances for each element weight are derived by adding the total of increases to the opening balance for each obligated material, and subtracting the total decreases from the obligated material balances, that occurred throughout the reporting period.

The weights should be reported to the same rounded number of decimal places as on the General Ledger and P-KMPIS reports.
610
Element weight - natural uranium

See description for label 600.
620
Element weight – depleted uranium

See description for label 600.
640-680
Isotope weight – enriched/unified uranium

All reports Report the isotope weight of each category of nuclear material in the batch. The individual numeric labels for this data element are in Table A14: Isotope Codes and Labels for Group 1 Material. See also to Section 3.2 Weight Units and Rounding.

Inventory Change Document
If applicable, subdivide the isotope weight of the item/batch by country of origin (see label 2003). The total isotope weight is allocated to at least one country of origin.

General Ledger
Provide the isotope weight(s) for each material element exactly as reported on the corresponding Inventory Change Document.

Increases in weight: Beginning on line “1”, provide the isotope weight of the increase, exactly as reported on the corresponding Inventory Change Document.

Decreases in weight: Beginning on line “1”, provide the isotope weight of the decrease, exactly as reported on the corresponding Inventory Change Document.

Summary of Inventory Changes
Provide the total weight reported for each IC code and sum the total increases and decreases.

List of Inventory Items
The individual numeric labels for this data element are defined in Table A14: Isotope Codes and Labels for Group 1 Material. The weights of individual items on the List of Inventory Items should be reported with the number of decimal places representative of the full accuracy of the measurement.

P-KMP Inventory Summary
Provide the sum of the isotope weights of all items on the List of Inventory Items group of items comprising the batch, maintaining decimal accuracy; the batch total may then be rounded to the agreed number of decimal places used on all other reports.

Reconciliation Statement
The isotope weights for book adjusted ending (BA) are taken from the ending balance of the General Ledger Report 1 of the PIT closing month. See Table A11: Reporting Codes for Reconciliation Statement for an explanation of BA.

The isotope weights for physical ending (PE) are taken from the totals of each isotope balance at PIT closing, as reported on the P-KMPIS. See Table A11: Reporting Codes for Reconciliation Statement for an explanation of PE.
The weights are reported to the same number of decimal places as on the General Ledger and P-KMPIS reports.

Obligated Material Inventory Summary
The opening balances for each isotope weight, for each country of obligation, are taken from the ending balances of the ledgers from the previous reporting period.

The first time a country of obligation is reported on a List of Inventory Items report, for an isotope, the opening balance for that material will be “0” (zero).

The ending balances for each isotope weight are derived by adding the total of increases to the opening balance for each obligated material, and subtracting the total decreases to the obligated material balances, that occurred throughout the reporting period.
700
Element weight - plutonium

See description for label 600.
710-760
Isotope weight - plutonium

See description for label 640.
770
Isotope weight - natural uranium

See description for label 640.
780
Isotope weight - depleted uranium

See description for label 640.
800
Element weight - thorium

See description for label 600.
1000
Line number

General Ledger and Summary of Inventory Change Report
Each line entry is consecutively numbered with an integer:
  1. The first line number is “0” (zero), and the opening balance is reported on line “0” (zero);
  2. The first inventory change is reported on line “1”, the second on line “2”, etc.; and
  3. The ending balance is reported on the last line of the report.

1001
Item identification

List of Inventory Items
Provide the identification number or item name for individual items. For example, bundle serial number, drum number, uranium hexafluoride cylinder number.
1002
Corrections - previous date

General Ledger
In the case of corrections, provide the month of the General Ledger that the Inventory Change Document being corrected was reported.
1003
Corrections - previous line number

General Ledger
In the case of corrections, provide the line number of the General Ledger on which the original Inventory Change Document or latest correction to this inventory change was reported.
1004
Comments/remarks

Provide any additional information to explain or assist in identifying the batch or items reported, as applicable.
1005
Stratum identification

List of Inventory Items
If one has been assigned, provide the stratum name for the batch or item. This name is usually assigned by IAEA for verifications.
1006
Element code

All reports
In all relevant reports, provide the appropriate element code from Table A13: Material Group Element Codes and Labels.

Inventory Change Document
A batch of items of nuclear material is reported with only one element code.

If the batch is composed of items that have different element codes, the batch of these items may be reported on one Inventory Change Document, depending on the combination of elements/isotopes. For example, a batch of fuel bundles composed of natural uranium and depleted uranium pins may be reported as one batch on the same Inventory Change Document with each element/isotope reported on separate lines.

Whenever various categories (elements) of material are blended and combined into a single category within an item, or when a material changes its category due to processing (e.g., blending, enrichment, irradiation), the batch cannot be reported as two material elements; it must be reported as a category change.

An element weight data label (600 to 800) may be reported only once per inventory change. For example, it is not permissible to report label 1635 (low enriched uranium) and label 640 (uranium-233) together with label 1636 (high enriched uranium) and label 640 (uranium-233) on a single Inventory Change Document.

Consideration must also be given to whether re-batching applies to cases when reporting a combination of elements in a batch. An explanation of re-batching is addressed in Section 4.1.3.2 Re-batching.
1007
Irradiation status

Provide the code “F” for fresh, non-irradiated material, and “I” for irradiated material, for each item on the List of Inventory Items and for each line entry on the P-KMPIS.
1013
Net weight

Inventory Change Document
Provide the total weight of the material, excluding the weight of containers and packaging.
1020
IAEA safeguards status

Inventory Change Document
This label identifies if the nuclear material is subject to IAEA safeguards. Label 1020 has four options:
  1. “Yes” for Group 1A material;
  2. “No” for Group 2 material;
  3. “Exempt U” for Group 1B material, exempted on the basis of use; and
  4. “Exempt Q” for Group 1B material, exempted on the basis of quantity.

1021
Correction number

Provide the information using Table A4: Entry Status Codes.

Inventory Change Document
If the Inventory Change Document is reporting a material inventory change for the first time, with entry status in label 309 “N”, then the correction number is “0” (zero) to indicate this is the original Inventory Change Document for the inventory change. If the Inventory Change Document is reporting a correction to the original or subsequent correction, with entry status “C” in label 309, the correction number is greater than “0” (zero). If the Inventory Change Document is reporting a deletion of a previously reported inventory change, with entry status “D”, the correction number remains the same as the Inventory Change Document it is deleting. General Ledger Provide the same correction number as reported for this inventory change for the Inventory Change Document correction.
1023
Units

Provide the appropriate weight unit for the element/isotope reported. See Table A13: Material Group Element Codes and Labels and Table A14: Isotope Codes and Labels for Group 1 Material.
1024
Isotope code for uranium

In all relevant reports, provide the appropriate isotope codes using Table A14: Isotope Codes and Labels for Group 1 Material.

Inventory Change Document
An isotope code may be reported only once per inventory change. For example, it is not permissible to report label 1635 (low enriched uranium) and label 640 (uranium-233) along with label 1635 (low enriched uranium) and label 670 (uranium-235) on a single Inventory Change Document.
1025
Unique identifier (optional)

Inventory Change Document, General Ledger, and List of Inventory Items
Provide any unique batch identification such as the lot number or cylinder number. This name may also be the same as the batch name (446).
1026
Number of inventory changes

Summary of Inventory Changes
Provide the number of transactions reported for each type of inventory change, including corrections.
1027
Shipper

Inventory Change Document
Provide the full name and address of shipper, or the initiator of an internal inventory change that decreases the amount of material in the MBA.
1028
Receiver

Inventory Change Document
Provide the full name and address of receiver, or the initiator of an internal inventory change that increases the amount of material in the MBA.
1030
Element weight balance

General Ledger
On line “0” (zero), provide the opening balance of the element weight, which is the ending balance of the previous General Ledger period.

Beginning on line “1”, provide the running element weight balance (i.e., the difference between the previous line balance and the new entry). This balance may be reported to a maximum of six decimal places.

On the last line of the ledger, provide the ending balance of the element weight in the MBA for the reported period.

Summary of Inventory Changes
On line “0” (zero), provide the opening balance of the element weight, which is the ending balance of the previous Summary of Inventory Changes period.
1031
Isotope weight balance

General Ledger

On “0” (zero), provide the opening balance of the isotope weight, which is the ending balance of the previous General Ledger period.

Beginning on line “1”, provide the running isotope weight balance (i.e., the difference between the previous line balance and the new entry).

On the last line of the ledger, provide the ending balance of the isotope weight in the MBA for the reported period. Summary of Inventory Changes

On line “0” (zero), provide the opening balance of the isotope weight, which is the ending balance of the previous Summary of Inventory Changes period.
1032
Element weight - natural uranium concentrate

See description for label 600.
1634
Element weight - thorium concentrate

See description for label 600.
1635
Element weight - low enriched uranium

See description for label 600.
1636
Element weight - high enriched uranium

See description for label 600.
2001
Export licence number

Inventory Change Document
This label is used to identify the CNSC Export Licence under which the shipment (export) of nuclear material has been authorized.

This label is also used to identify the CNSC letter of consent number when reporting a transfer of nuclear material from a holding account. In such a case, it is also necessary to provide the abbreviation “HA” (holding account) in label 411, and to provide the code for the holding account from which the transfer was made in label 2005.
2002
Import licence number

Inventory Change Document
This label is used to identify the CNSC Import Licence under which the receipt (import) of nuclear material has been authorized.
2003
Country of origin

Inventory Change Documentand General Ledger
If applicable, identify the country of origin of the nuclear material on the Inventory Change Document report. For multiple countries of origin, enter only one country of origin on each line of the form using Table A5: Country Codes.
2004
Foreign obligation country code

Inventory Change Document, General Ledger, and Obligated Material Summary
The relevant foreign obligation code(s) is provided by CNSC to the licensee at the time an import/export licence is issued, using Table A5: Country Codes. If the material has no foreign obligations, this field and the obligated weight fields are left blank.

It is possible that only a portion of the element/isotope weight has foreign obligations, because obligated material may be mixed with non-obligated material.

A shipment may have more than one foreign obligation. For example, half of the nuclear material is obligated to country X and the other half to country Y. A proportional approach is used to assign the appropriate quantity of nuclear material with the appropriate foreign obligation code. Separate line items are required for label 2004 to identify the various obligated portions of nuclear material.

When nuclear material has more than one foreign obligation on the entire quantity, the nuclear material is obligated to both countries simultaneously. It does not result in portions of the nuclear material being obligated to each country. For example, if the entire shipment of 100 kg of nuclear material is obligated to both country X and country Y, then 100 kg is reported as obligated to country X and 100 kg is obligated to country Y.
2005
Holding account code

Inventory Change Document
Provide the applicable holding account code where nuclear material is exported to or transferred from, using Table A8: Holding Account Codes.
2006
Foreign obligation element weight

Inventory Change Document, General Ledger, and Obligated Material Summary
Provide the element weight for each foreign obligation code provided in label 2004. Provide the element weights in the units as specified in Table A13: Material Group Element Codes and Labels. For unobligated and Canadian material, this field is left blank.
2007
Foreign obligation isotope weight

Inventory Change Document, General Ledger, and Obligated Material Summary
Provide the isotope weight (in grams) for each foreign obligation code provided in label 2004. For unobligated and Canadian material, this field is left blank.

Appendix A: Reference Tables

Table A1: Group 1 Facility Codes
Group 1 Facility / Material Balance Areas (MBA) Facility Code MBA Code
Label 207 Labels 307, 370, 372
AECL Chalk River Laboratories, NM CNA- CNA1
AECL Chalk River Laboratories, NM CNA- CNA2
AECL Chalk River Laboratories, NRX CNB- CNB1
AECL Chalk River Laboratories, Dedicated Isotope Facility CNBM CNBM
AECL Chalk River Laboratories, NRU CNC- CN-C
AECL Chalk River Laboratories NFFF CND- CND1
AECL Chalk River Laboratories Metallurgy CND- CND2
AECL Chalk River Laboratories Mo-99 Production Facility CND- CND4
AECL Chalk River Laboratories Shielded Facilities CND- CND5
AECL Chalk River Laboratories Waste Management Area B CNDA CNDA
AECL Chalk River Laboratories Waste Management Area G CNDB CNDB
AECL Chalk River Laboratories Fuel Fabrication 405 CNDC CNDC
AECL Chalk River Laboratories Waste Management Area CNDD CNDD
AECL Chalk River Laboratories Liquid Waste Storage Facility CNDE CNDE
AECL Chalk River Laboratories Health Sciences CNE- CNE1
AECL Chalk River Laboratories Chemistry CNE- CNE2
AECL Chalk River Laboratories Reactor and Radiation Physics CNE- CNE4
AECL Chalk River Laboratories Fuel and Fuel Channel Safety CNE- CNE5
AECL Chalk River Manufacturing 466 CNE- CNE6
AECL Chalk River Laboratories FPSF CNJ- CN-J
AECL Whiteshell Laboratories CNP- CN-P
AECL Gentilly-1 Waste Management CNN- CN-N
AECL Douglas Point Waste Management CNO- CN-O
Best Theratronics Ltd. CNS1 CN1S
Bruce Power Bruce Generating Station “A” CNK- CN-K
Bruce Power Bruce Generating Station “B” CNKB CNBK
Cameco Blind River Refinery CNBR CNBR
Cameco Port Hope Conversion Facility CNFN CNFN
Cameco Fuel Manufacturing (formerly Zircatec Precision Industries Limited) CNG- CNG1
Dalhousie University SLOWPOKE CNT- CN-T
École Polytechnique SLOWPOKE CN6Y CNY6
GE – Hitachi Canada Inc., Peterborough CNI- CN-I
GE – Hitachi Canada Inc., Toronto CNH- CN-H
Hydro-Québec Centrale Nucléaire Gentilly-2 CNNB CNBN
McMaster University CNQ- CN-Q
MDS Nordion CNS- CN-S
New Brunswick Power Point Lepreau Generating Station CNNC CNCN
OPG Pickering Generating Stations A & B CNM- CN-M
OPG Pickering Used Fuel Dry Storage Facility CNMS CNSM
OPG Darlington Generating Station CNAA CNAA
OPG Darlington Used Fuel Dry Storage Facility (to be established) CNAS CNAS
OPG Western Used Fuel Dry Storage Facility CNKS CNKS
Royal Military College SLOWPOKE CNX- CN-X
Saskatchewan Research Council SLOWPOKE CNU- CN-U
University of Alberta SLOWPOKE CNW- CN-W
University of Toronto SLOWPOKE CNR- CN-R
Table A2: Group 1 Locations Outside Facilities Codes
Locations Outside Facilities (LOFs) Facility Code MBA Code KMP Code
Label 207 Label 307, 370, 372 Label 407
AECL Sheridan Park, Ontario CNZ- CN-Z C
Kinectrics Inc., Ontario CNZ- CN-Z E
Mississauga Metals & Alloys, Ontario CNZ- CN-Z D
Stern Laboratories, Ontario CNZ- CN-Z B
trIUMF, British Columbia CNZ- CN-Z J
Canadian LOF – Industry Locations CN-2 CN-2 A
Canadian LOF – Laboratory Locations CN-2 CN-2 B
Canadian LOF – University Locations CN-2 CN-2 C
Canadian LOF – Hospitals and Clinics CN-2 CN-2 D
Table A3: Group 2 Material Balance Area Codes
Group 2
Material Balance Areas
Location MBA Code
Labels 307, 370, 372
   
Refineries  
Cameco Corp., Blind River Refinery Ontario DBR
Cameco Corp., Port Hope Ontario F1S
Cameco Corp., Port Hope Ontario DAY
Mine/Mill Facilities  
Areva Resources Canada Inc., Cluff Lake Saskatchewan DAM
Areva Resources Canada Inc., McArthur River Saskatchewan DMR
Areva Resources Canada Inc., McClean Lake Saskatchewan DML
Areva Resources Canada Inc., Kiggavik Project (Baker Lake) Nunavut DKP
Areva Resources Canada Inc., Shea Creek Saskatchewan DSP
Cameco Corp., Key Lake Saskatchewan DKL
Cameco Corp., Rabbit Lake Saskatchewan DGM
Table A4: Entry Status Codes
Code Purpose Permissible
Inventory Change Code Label
Corresponding
Correction Entry Label 1020
A Add a new transaction to a previous report. Table A.6 0 (zero)
C Correct a previous transaction referenced by this entry. Table A.6 1, 2, or higher (not zero)
D Delete a previous transaction referenced by this entry. Table A.6 Same correction entry number as the report it is deleting.
N Report a new Inventory Change transaction. Table A.6 0
U Identify an Inventory Change code. Table A.7 0, 1, 2, or higher
Table A5: Country Codes
Country Code Country Code
A
Afghanistan AF Albania AL
Algeria DZ Andorra AD
Antigua & Barbuda AB Argentina RA
Armenia AM Australia AS
Austria AU Azerbaijan AR
B
Bahamas BA Bahrain BH
Bangladesh BD Barbados BB
Belgium BL Benin BE
Bhutan BT Bolivia BO
Bosnia and Herzegovina HB Botswana RB
Brazil BR Brunei Darussalam BN
Bulgaria BG Burkina Faso HV
Burundi RU    
C
Cambodia KR Cameroon, Republic of TC
Canada CN Cape Verde CV
Central African Republic CA Chad CD
Chile CE China, People’s Republic of X
China, Republic of (Taiwan) TW Columbia CO
Cormoros KM Congo, People’s Republic of CB
Cook Islands KS Costa Rica CR
Croatia CT Cuba CU
Cyprus CY Czechoslovakia, Republic of CZ
D
Denmark DK Djibouti DJ
Dominica DM Dominican Republic DO
E
Ecuador EC Egypt ET
El Salvador SV Equatorial Guinea GE
Estonia EA Ethiopia EP
EURATOM W    
F
Fiji IF Finland SF
France F    
G
Gabon GA Gambia GM
Georgia GO Germany DF
Ghana GH Grenada GD
Guatemala GT Guinea GN
Guinea-Bissau GI Guyana GU
H
Haiti RH Holy See HS
Honduras HO Hungary HU
I
IAEA IA IAEA Japan Regional Office IJ
IAEA Toronto Regional Office IC Iceland IS
India IN Indonesia RI
Iran, Islamic Republic of IR Iraq IQ
Ireland ID Israel IL
Italy IT    
J
Jamaica AJ Japan J
Jordan HJ    
K
Kazakhstan KA Kenya KN
Korea, Democratic People’s Republic of KD Korea, Republic of KO
Kuwait KW Kyrgyzstan KY
L
Lao People’s Democratic Republic LA Latvia LV
Liberia LB Libyan Arab Jamahiriya LI
Liechtenstein LN Lithuania LT
Luxembourg LX    
M
Madagascar RM Malawi MW
Malaysia MY Maldives MD
Mali ML Malta MT
Marshall Islands MH Mauritania MU
Mauritius MS Mexico MX
Micronesia MF Moldova MO
Monaco MC Mongolia MN
Morocco MA Mozambique MB
Myanmar BU    
N
Namibia NM Nauru NU
Nepal NP Netherlands NL
Netherlands Antilles NA New Caledonia NC
New Zealand NZ Nicaragua NI
NIUE NE Niger NG
Nigeria NF Norway NO
O
Oman AO    
P
Pakistan PK Panama PA
Papua New Guinea PN Paraguay PY
Peru PE Philippines PI
Poland PL Portugal PO
Q
Qatar S    
R
Romania RO Russian Federation Z
Rwanda RW    
S
Samoa SS San Marino SM
Sao Tome and Principe ST Saudi Arabia SA
Senegal SE Seychelles SY
Sierra Leone SL Singapore SG
Slovakia SX Slovenia VE
Solomon Islands SB Somalia SO
South Africa AZ Spain ES
Sri Lanka CL St. Kitts, Nevis SK
St. Lucia SC St. Vincent Grenadines VG
Sudan SN Surinam SI
Swaziland SD Sweden SW
Switzerland CH Syrian Arab Republic SR
T
Taiwan TW Tajikistan TK
Tanzania, United Republic of TA Thailand TH
Togo TG Tonga TO
Trinidad and Tobago TT Tunisia TN
Turkey tr Turkmenistan TM
Tuvalu TU    
U
Uganda EU Ukraine UR
United Arab Emirates AE United Kingdom Q
Uruguay GY USA U
Uzbekistan KT    
V
Vanuatu VU Venezuela NV
Viet Nam, Socialist Republic of RV    
Y
Yemen, Republic of YE Yugoslavia IU
Z
Zaire CK Zimbabwe MI
Table A6: Inventory Change Codes
Keyword Code Explanation
Accidental gain GA Nuclear material unexpectedly found to be present in the MBA, except when detected in the course of a physical inventory taking.
Accidental loss LA Irretrievable and inadvertent loss of a known quantity of nuclear material as the result of an operational accident.
Category change
(not applicable to MBAs that report in terms of “unified uranium”)
DE
DN
ED
EN
ND
NE
Quantity of uranium that has changed category as a result of blending, enrichment, depletion or burn-up. The first letter denotes the original, the second letter the resulting category: (E = enriched, N = natural, D = depleted uranium).
De-exemption quantity DQ Reapplication of safeguards on nuclear material previously exempted from safeguards.
De-exemption use DU Reapplication of safeguards on nuclear material previously exempted from safeguards.
Exemption quantity EQ Exemption of nuclear material from safeguards.
Exemption use EU Exemption of nuclear material from safeguards.
Measured discard LD Operational loss, i.e., loss of a measured or estimated (on the basis of measurement) quantity of nuclear material from processing that has been disposed of in such a way that it is not suitable for further nuclear use.
Nuclear loss LN Consumption of nuclear material due to its transformation into other element(s) or isotope(s) as a result of nuclear reactions.
Nuclear production NP Production of fissionable material in a reactor (plutonium, uranium-233).
Receipt domestic RD Domestic receipt of nuclear material from another MBA.
Receipt foreign RF Import of nuclear material into Canada.
Receipt from non-safeguarded activity RN Domestic receipt of nuclear material from non-safeguarded (permitted military) activity.
Receipt at starting point RS Domestic receipt of nuclear material at starting point of safeguards.
Re-batching - decrease in batch content RM Quantity by which the batch mentioned in the entry is diminished due to re-batching.
Re-batching - increase in batch content RP Quantity of material added to the batch mentioned in the entry from another batch due to re-batching.
Retained waste - retransfer from FW Retransfer of material that had been stored at the MBA as retained waste, to the nuclear material inventory. This applies whenever material in the retained waste category is removed from storage either for processing at the MBA or for transfer from the MBA.
Retained waste - transfer to TW Transfer to the retained waste category of measured nuclear material that is deemed to be irrecoverable, to be stored at the MBA and to be deleted from the inventory of the MBA.
Shipment domestic SD Domestic transfer of nuclear material to another MBA.
Shipment foreign SF Export of nuclear material out of Canada.
Shipment to non-safeguarded activity SN Domestic transfer of nuclear material to non-safeguarded (permitted military) activity.
Shipper-receiver difference DI Difference between the batch quantity reported as received (always on shipper’s data) and the quantity of the same batch as measured by the operator of the receiving MBA.
Termination TU Termination of safeguards on nuclear material.

The following inventory change codes may be used only with the authorization of CNSC:

Table A7: Inventory Change Codes for Entry Status U
Keyword Code Explanation
Negative interim inventory difference L- Decreases the balance of the General Ledger to agree with the measured physical inventory weight.
Positive interim inventory difference L+ Increases the balance of the General Ledger to agree with the measured physical inventory weight.
Rounding up correction R+ The difference between the rounded and unrounded quantity of a batch of nuclear material when the rounded quantity is greater than the unrounded quantity. “R+” increases the balance of the General Ledger.
Rounding down correction R- The difference between the rounded and unrounded quantity of a batch of nuclear material when the rounded quantity is less than the unrounded quantity. “R-” decreases the balance of the General Ledger.
Table A8: Holding Account Codes
Holding Account Country Code
Label 2005
Allied Signal United States UUSCA
British Nuclear Fuels Limited United Kingdom CUKHD
British Nuclear Fuels Limited United Kingdom UUKCA
Comhurex (Cameco) France CFRHD
Comhurex (Uranerz) France UFRCA
Converdyn United States CCCHD
Eurodif France ELD8405
Urenco (Almelo) Netherlands NLHLD
Urenco (Capenhurst) United Kingdom UKHLD
Urenco (Gronau) Germany GEHLD
USEC United States UNHLD
Table A9: Material Description Codes
Material Description Codes: Four Characters required
First Two Characters: Physical and Chemical Forms
First Keyword Second Keyword First Two
Characters
Ceramics Pellets CP
  Spheres CS
  Other CO
Fuel Rods, pins ER
Plates EP
Bundles EB
Assemblies EA
Other EO
Liquid waste Low active WL
Medium active WM
High active WH
Metal Pure MP
Alloys MA
Powder Homogeneous PH
Heterogeneous PN
Sealed sources -- SS
Small quantities, samples -- QS
Scrap Homogeneous SH
  Heterogeneous (cleanouts, clinkers, sludge, fines, other) SN
Solid waste Hulls AH
Mixed (plastics, gloves, papers, etc.) AM
Contaminated equipment AC
Other AO
Solution Nitrate LN
Fluorides LF
Other LO
Third Character: Container Types
  Third Keyword Third Character
  Cylinder C
Pack P
Drum D
Discrete fuel units (fuel only) S
Bird cage B
Bottle F
Other O
Fourth Character: Characterization of Material
  Fourth Keyword Fourth Character
  Fresh (not irradiated) material F
Irradiated material I
Retained waste W
Irrecoverable material N
Recoverable material R
Table A10: Measurement Basis Codes
MB Code Description of Use Examples
L Batch data are based on measurements made at another MBA and have been reported for the present MBA in a preceding Inventory Change Document or List of Inventory Items. New measurements to verify and correct previous estimated values of inventory.
M Batch data are based on fresh measurements made at the MBA. 1. Reporting of shipper-receiver differences based on re-measurement of receipts by the MBA; and
2. Calculations of NP and LN. See Table A6: Inventory Change Codes.
N Batch data are based on measurements made at another MBA. 1. Receipts accepted at shipper’s values; and
2. Sample measurements made by an outside MBA.
T Batch data are based on measurements made at the present MBA and have been reported on a preceding Inventory Change Document or List of Inventory Items; the measurements have not been repeated. New measurement of existing inventory.
Table A11: Reporting Codes for Reconciliation Statement
Term Code Explanation
Book adjusted ending BA The algebraic sum of the beginning physical inventory and of the inventory changes over the period, adjusted to take account of the shipper-receiver differences.
The beginning physical inventory is equal to the ending physical inventory of the previous reconciliation statement relating to the same category of nuclear material.
BA is the balance of the General Ledger as of the effective date of the physical inventory verification.
Physical ending PE The sum of all measured and derived batch/item quantities of nuclear material on hand at the date of the physical inventory taking, i.e., the total of the List of Inventory Items.
Inventory difference ID The difference between the book adjusted ending (BA) and the physical ending (PE), i.e., ID = BA - PE.
Any non-zero ID should be reported on an Inventory Change Document dated on the date of the PIT. Also last transaction to be reported on the last General Ledger ending the material balance period.

Licensees reporting interim L+ and L- inventory differences should consult with CNSC for a revised Reconciliation Statement. The revised statements include additional line entries for the sum of the L+ and calculate an adjusted inventory difference.

Table A12: Reporting Deviations from Reconciliation Statement
Term Code Definition/Explanation
Minus the sum of L± The sum of all interim differences reported as L± on an Inventory Change Document for each material category is provided in these fields of the revised form.
Adjusted inventory difference AID The difference between the ID and the sum of L±, i.e., AID = ID - sum of L±.
Table A13: Material Group Element Codes and Labels
Element Code 1006 Element Weight Units
Label 1023
Weight Label
Group 1A and 1B
Request from CNSC Unified uranium g 600
N Natural uranium kg 610
D Depleted uranium kg 620
EMaterial Group Element Codes and Labels table footnote 1 Enriched uranium g 630
LMaterial Group Element Codes and Labels table footnote 2,Material Group Element Codes and Labels table footnote 3 Low enriched uranium g 1635
HMaterial Group Element Codes and Labels table footnote 4,Material Group Element Codes and Labels table footnote 5 High enriched uranium g 1636
P Plutonium g 700
T Thorium kg 800
Group 2
Request from CNSC Unified uranium g 600
C Natural uranium concentrate kg 1032
TC Thorium concentrate kg 1634

Back to reference 1Element code E (IAEA code 10) applies to uranium enriched in either the isotope uranium 235 or uranium 233 or a combination of uranium-233 and uranium-235.
Back to reference 2Element code L (CNSC code) is used in place of element code E for uranium enriched in the isotope uranium-235 or uranium-233 less than 20%.
Back to reference 3Uranium enriched in a combination of uranium-233 and uranium-235 less than 20% is to be reported with element code L.
Back to reference 4Element code H (CNSC code) is used in place of element code E for uranium enriched in either isotope uranium-235 or uranium-233 greater than or equal to 20%.
Back to reference 5Uranium enriched in a combination of uranium-233 and uranium-235 greater than or equal to 20% is to be reported with element code H.

Table A14: Isotope Codes and Labels for Group 1 Material
Isotope
Code 1024
IsotopeIsotope Codes and Labels for Group 1 Material table footnote 1 Weight Units
Label 1023
Weight
Label
K Enriched/unified uranium-233 content g 640
J Enriched/unified uranium-233 + uranium-235 content g 660
G Enriched/unified uranium-235 content g 670
Isotopes reported as required for:
Not currently used Enriched/unified uranium-234 content g 650
Enriched/unified uranium-236 content g 680
Enriched/unified uranium-238 content g 690
Plutonium-238 content g 710
Plutonium-239 content g 720
Plutonium-240 content g 730
Plutonium-241 content g 740
Plutonium-242 content g 750
Plutonium-239 + plutonium-241 content g 760
Natural uranium fissile content g 770
Depleted uranium fissile content g 780

Back to Isotope Codes and Labels for Group 1 Material reference 1 Isotopes are not reported for natural uranium, depleted uranium, plutonium or thorium.

Appendix B: Abbreviations

Code Description

BA
Book adjusted ending, BA = BE - DI (shipper-receiver difference)
BE
Book ending
C
Element code for natural uranium ore concentrates
D
Element code for depleted uranium
DE
Depleted uranium to enriched uranium category change
DI
Shipper/receiver difference
DN
Depleted uranium to natural uranium category change
DQ
De-exemption quantity
DU
De-exemption use
E
Element code for enriched uranium (see HEU and LEU)
ED
Enriched uranium to depleted uranium category change
EN
Enriched uranium to natural uranium category change
EQ
Exemption quantity
EU
Exemption use
FW
Retransfer from retained waste
G
Isotope code for uranium enriched in uranium-235
GA
Accidental gain
HA
Holding account
HEU
High enriched uranium
ID
Inventory difference
J
Isotope code for uranium enriched in uranium-235 and uranium-233
K
Isotope code for uranium enriched in uranium-233
LA
Accidental loss
LD
Measured discard
LEU
Low enriched uranium
LN
Nuclear loss
N
Element code for natural uranium
ND
Natural uranium to depleted uranium category change
NE
Natural uranium to enriched uranium category change
NP
Nuclear production
P
Element code for plutonium
PE
Physical ending
R+, R-
Rounding decimal difference between the rounded and unrounded quantity of a batch of nuclear material
RD
Receipt domestic
RF
Receipt foreign
RM
Decrease in batch content
RN
Receipt from non-safeguarded (permitted military) activity
RP
Increase in batch content
SD
Shipment - domestic
SF
Shipment - foreign
SN
Shipment to non-safeguarded (permitted military) activity
T
Element code for thorium
TC
Element code for non-safeguarded thorium concentrates
TU
Termination use
TW
Transfer to retained waste
U
Element code for uranium

Glossary

Accounting
A system of records and reports that shows, for each MBA, the inventory of nuclear material and the changes in that inventory including receipts into and transfers out of the material balance area.
Account audit
An examination by IAEA or CNSC inspectors of the nuclear material accounts, records, and reports at a facility to check for completeness, correctness, internal consistency, and consistency with the State Reports.
Accounting records
A set of data kept at each facility or location outside facilities showing the quantity of each category of nuclear material present, its distribution within the facility and any changes affecting it. Accounting records contain in respect of each MBA:
  1. All inventory changes, so as to permit a determination of the book inventory at any time;
  2. All measurement results that are used for determination of the physical inventory; and
  3. All adjustments and corrections that have been made in respect of inventory changes, book inventories, and physical inventories.
Batch
A portion of nuclear material handled as a unit for accounting purposes at a key measurement point. The composition and quantity are defined by a single set of specifications (material description code) or measurements (concentration, enrichment). The nuclear material may be in bulk form or contained in a number of separate items.

Items included in a batch must contain nuclear material of the same element concentration and enrichment. Items of different material description codes must be reported as separate batches.
Batch data
The total weight of each element of nuclear material and its isotopic composition as applicable.
Book adjusted ending
The algebraic sum of the beginning physical inventory and of the inventory changes over the period, adjusted to take account of the shipper-receiver differences.
Book inventory
The algebraic sum for a given point in time of the most recent physical inventory of an MBA and all inventory changes that have occurred since that physical inventory was taken.
Bulk form
Material in bulk form such as a liquid, gas, powder, pellets, or pebbles, that is not individually identified for accounting purposes. Bulk form material may be contained in a tank, drum, tote, or box.
Burn-up
See definition for nuclear loss below.
By-difference correction principle (BDCP)
The procedure by which a correction to an inventory change data element in a report is applied within the material balance period in which the change is dated. The weight difference between the original record and the correcting record is recorded in the accounts (i.e., General Ledger) as of the date the correction to the inventory change is realized and recorded.
Category change
A change in one of the three categories of uranium: depleted uranium, natural uranium, and enriched uranium. Uranium can change category as a result of blending, enrichment, depletion or burn-up. For example, natural uranium can become depleted uranium as a result of the burn-up of uranium-235. Category change results in the reduction of one category of uranium and a corresponding increase in another.
Code 10
Chapter 10 of the subsidiary arrangements of the Canada/IAEA Safeguards Agreement.
Concentrate
An extracted product, containing uranium or thorium, resulting from the physical or chemical separation from ore.
Correction
Entry into an accounting record or a report to rectify an identified mistake or to reflect an improved measurement of a quantity previously entered into the record or report.
Country of supply
Country of supply is identified as the country from where the nuclear material was shipped prior to entering Canada.
Country of obligation
Country of obligation is identified as the country with which Canada has agreed to accept conditions on the use of the nuclear material received from that country.

The country of obligation is not necessarily the country of origin or of supply. The countries of obligation, origin, and supply may all be different. For a given quantity of nuclear material, there may be a single country of obligation, multiple countries of obligation, or no foreign obligation. Material that has no specified obligations is referred to as unobligated.
Country of origin
Country of origin is identified as the country where the nuclear material was mined.
Data element
Unit of information in the Material Balance Area records.
Depleted uranium
Uranium that contains uranium-235 in a concentration of less than 0.7%, which is less than that normally found in nature.
Effective kilogram
A unit of measurement used in accounting and reporting of safeguarded nuclear material:
Element Enrichment (for uranium) Effective Kilogram
Uranium enrichment of 1 percent and higher weight in kilograms multiplied by the square of its enrichment
Uranium enrichment less than 1 percent and more than 0.5 percent weight in kilograms multiplied by 0.0001
Depleted uranium enrichment of 0.5 percent or less weight in kilograms multiplied by 0.00005
Plutonium   weight in kilograms
Thorium   weight in kilograms multiplied by 0.00005

Enriched uranium
Uranium that has a higher abundance of the fissile isotopes (uranium-235, uranium-233, or a combination of both) than natural uranium.
Exempted material
Any nuclear material that was initially classified as Group 1A and has been granted a temporary classification to Group 1B. The material remains classified as Group 1B until it is re-classified to Group 1A. Material may be exempted on the basis of non-nuclear use or by quantity less than 1 effective kilogram.
Facility
A reactor, critical facility, conversion plant, fabrication plant, reprocessing plant, isotope separation plant, or a separate storage installation; or any location where nuclear material in amounts greater than one effective kilogram is customarily used.
Fertile material
Nuclear material that can be converted into a special fissionable material through the capture of one neutron per nucleus. There are two naturally occurring fertile materials, uranium-238 and thorium-232. Through the capture of neutrons followed by two beta decays, these fertile materials are converted to fissionable plutonium-239 and uranium-233, respectively.
Fissile isotopes
Plutonium, uranium-235, and uranium-233.
Foreign obligations
When nuclear material is imported into Canada under a Nuclear Cooperation Agreement (NCA), it is deemed to have foreign obligations.

Foreign obligations include, among other conditions, the requirement to track and report on nuclear material transferred to Canada subject to an NCA, and transferred within Canada. Nuclear material transferred subject to an NCA is identified by way of government-to-government communications. In cases where nuclear material transferred to Canada is made subject to a bilateral NCA by the supplying country, CNSC informs the licensee at the time an import/export licence is issued that the nuclear material has foreign obligations.

The country of foreign obligation is not necessarily the country of origin or of supply. The countries of obligation, origin and supply may all be different. For a given quantity of nuclear material, there may be a single country of obligation, multiple countries of obligation or no foreign obligation. Material that has no specified obligations is referred to as obligated.
High enriched uranium
Uranium containing 20 % or more of: isotope uranium-235, isotope uranium-233, or combined uranium-233 and uranium-235.
Holding account
A holding account is a holding area at an identified foreign facility to which unallocated Canadian-origin nuclear material can be exported and temporarily held pending the conclusion of a commercial arrangement for nuclear material held in the account.
Inventory change
An increase or decrease of nuclear material, in terms of batches, in a Material Balance Area.
Inventory difference
The difference between the book adjusted inventory and the physical ending as reported on the Reconciliation Statement. (also known as Material Unaccounted For (MUF)).
Item
Individually identifiable units of nuclear material, for example, a fuel assembly, or material in bulk form in a container, such as a tank or box, that are kept intact while stored in the Material Balance Area.
Key measurement point (KMP)
A location in an MBA where nuclear material is processed or stored. A physical-KMP is a storage location where the quantity of the material can be determined. A flow-KMP is a place where the movement of the material is determined.
Label
Unique three or four digit numbers used to clearly identify information in nuclear material accountancy.
Location outside facility (LOF)
Any installation or location, that is not a facility, where nuclear material is customarily used in amounts of one effective kilogram or less, and is subject to full nuclear material accounting and reporting.
Low enriched uranium
Enriched uranium containing less than 20 % of: isotope uranium-235, uranium-233, or combined uranium-233 and uranium-235.
Material balance area (MBA)
An area within a facility, or a location outside of a facility (LOF), such that:
  1. The quantity of nuclear material in each transfer into and out of the area can be determined; and
  2. The physical inventory of nuclear material in each material balance area can be determined when necessary, in accordance with specified procedures, so the material balance for IAEA safeguards purposes can be established.
Material balance period
The time between two consecutive physical inventory takings.
Measurement basis code (also measurement identification code)
The data element for the method used to measure or determine the weight or mass data of a nuclear material element and isotope.

The Measurement Basis (MB) code indicates whether the weight data was determined in the current MBA or another MBA and whether the data was new or previously reported.
Material category
For the purpose of nuclear accounting, element material categories are: natural uranium, depleted uranium, enriched uranium, thorium and plutonium. Isotope material categories are: uranium-235, uranium-233, and plutonium-239.
Material description code (MDC)
A four character code used to describe nuclear material batches by physical form, chemical composition, containment or type of container and irradiation status and quality.
Natural uranium
Uranium that contains the isotope uranium-235 in a concentration that is normally found in nature.
Non-safeguarded material
Source material and special fissionable material under IAEA safeguards (Agreement INFCIRC/164) that has not reached the stage of the nuclear fuel cycle as described in Article 34 (c).
Nuclear loss
Loss of nuclear material due to its transformation into other element(s) or isotope(s) as a result of nuclear reactions. Nuclear loss also includes burn-up of nuclear material in a reactor and decay during storage.
Nuclear material
For the purposes of this document, nuclear material includes natural uranium, depleted uranium, enriched uranium, plutonium, and thorium.

Material within the scope of this document requiring reporting to CNSC includes all material under the Canada/IAEA safeguards agreement. Group 1 is nuclear material that is safeguarded under the Canada/IAEA safeguards agreement, Article 34 (c). Group 2 is source material excluding both ore residues and depleted uranium.
Nuclear production
The generation of special fissionable material through the irradiation of fertile material in a reactor.
Obligations
See Foreign obligations.
Operator
The person or organization responsible for the nuclear material inventory.
Ore
A mineral or chemical aggregate containing uranium (or thorium) in a quantity and of a quality that makes mining and extracting the uranium (thorium) economically viable.
Physical ending
The sum of all measured and derived batch/item quantities of nuclear material on hand at the date of the physical inventory taking, i.e., the total of the List of Inventory Items.
Physical inventory
The sum of all the measured or derived estimates of batch quantities of nuclear material at a given time within an MBA obtained in accordance with the licensees’ (CNSC-approved) programs and procedures.
Physical inventory verification (PIV)
An inspection activity that follows closely, or coincides with, the Physical Inventory Taking by the operator and closes the material balance period. The basis for the PIV is the List of Inventory Items prepared by the operator.
Re-batching
Accounting for changes to the physical inventory (e.g., chemical and physical form, irradiation status) of an individual batch of nuclear material.
Retained Waste
A subset of Group 1A , retained waste is nuclear material that has been identified as unrecoverable and is stored in the MBA. This nuclear material can be transferred to retained waste upon approval of CNSC staff. After transfer, the only reporting requirement is to provide an inventory listing upon request.
Safeguarded nuclear material
Source material and special fissionable material under IAEA Safeguards (Agreements INFCIRC/164, Subsidiary Arrangements, and Additional Protocol INFCIRC/164/Add 1) that has reached the stage of the nuclear fuel cycle, as described in Article 34 (c), that it is suitable for fuel fabrication or for isotopic enrichment. In Canada, this is uranyl nitrate. Further to Article 34 (c), nuclear material at or beyond this stage of the fuel cycle is subject to all safeguards procedures specified in the safeguards agreement.
Shipper/receiver difference
The difference between the quantities of nuclear material in a batch as stated by the shipping material balance area and as measured at the receiving MBA.
Source material
Uranium containing the mixture of isotopes occurring in nature; uraniumdepleted in the isotope 235; thorium; any of the foregoing in the form of metal, alloy, chemical compound, or concentrate. Ore concentrate is considered to be source material. For the purposes of this document, the term source material is not interpreted as applying to ore or ore residue.
Special fissionable material
Group 1 nuclear material that contains plutonium-239, uranium-233, and uranium enriched in the isotopes 235 or 233, and any material that contains any of the foregoing. The term “special fissionable material” does not include source material.
Starting point of safeguards
The starting point of IAEA safeguards under the Canada/IAEA Safeguards Agreement is:
  1. When any nuclear material of a composition and purity suitable for fuel fabrication or for isotopic enrichment leaves the plant or the process stage in that it has been produced; and
  2. When such nuclear material, or any other nuclear material produced at a later stage in the nuclear fuel cycle, is imported into Canada.

In Canada the starting point of IAEA safeguards is the introduction of uranium ore concentrate feed from a mill or imported and processed into uranyl nitrates at a refinery. The IAEA safeguards under the Canada/IAEA Safeguards Agreement do not apply to material in mining or ore processing activities.

Stratum
A grouping of items and/or batches having similar physical and chemical characteristics. For example, items maybe grouped according to isotopic composition in order to facilitate statistical sampling.
Tare weight
The weight of a container and/or packing material without the weight of the material it contains.
Transfers
Any movement of nuclear material, both domestic (between Canadian MBAs) and foreign (imports and exports).
Unified uranium
A category of uranium, used for nuclear material accounting and reporting purposes under the safeguards agreement, where all uranium (natural, depleted and enriched) is included in a single (unified) account.
Weight data
The numeric label and the element or isotope weight of an item or batch of nuclear material.

Additional Information

The following documents contain additional information that may be of interest to persons to which this document applies.

  1. International Atomic Energy Agency, Agreement between the Government of Canada and the International Atomic Energy Agency for the Application of Safeguards in Connection with the Treaty on the Non-Proliferation of Nuclear Weapons; INFCIRC/164, 1972.
  2. International Atomic Energy Agency, IAEA Guidelines for State System of Accounting for and Control of Nuclear Materials. International Nuclear Verification Series; INFCIRC 2 1980, 2006.
  3. International Atomic Energy Agency, IAEA Safeguards Glossary; 2001 Edition, International Nuclear Verification Series 3, 2001.
  4. International Atomic Energy Agency, Nuclear Material Accounting Handbook; Services Series 15, 2008.
  5. International Atomic Energy Agency, Protocol Additional to the Agreement between Canada and the International Atomic Energy Agency for the Application of Safeguards in Connection with the Treaty on the Non-Proliferation of Nuclear Weapons; INFCIRC 164/Add 1, 2000.