Event Reports for Major Nuclear Facilities

Public Disclosure

The Canadian Nuclear Safety Commission (CNSC) requires major nuclear facilities to disclose to the public events and incidents involving its licensed activities that relate to the health, safety and security of Canadians and the environment.

For more information on the CNSC's requirements for licensees to inform the public, read RD/GD 99.3 Public Information and Disclosure, published in March 2012.

CNSC employees inspect a transport package containing nuclear material.

Below is a compilation of routine and non-routine events, and incidents released to the public since 2013. Please visit licensees' websites for complete listing of their events and incidents, and to view their public disclosure protocols.

Contact us directly for more information on the events listed below.

Uranium Mines and Mills

2016

Date of event Date of disclosure Licensee Facility Description
April 9, 2016 April 14, 2016 Cameco Key Lake Mill, Northern Saskatchewan The CNSC was informed by Cameco, in accordance with the regulations and their licence conditions, that a worker was injured at Cameco’s Key Lake Mill in Saskatchewan. A truck driver was seriously injured in a fall from a tank trailer and was flown by air ambulance to Saskatoon to be admitted to hospital. This was a non-radiological event with no impact to the health and safety of other workers or the environment. The cause of the accident is under investigation by Cameco as well as agencies at the federal and provincial levels. Visit Cameco’s website for more information.

2015

Date of event Date of disclosure Licensee Facility Description
December 16, 2015 Cameco Rabbit Lake Mine and Mill, Northern Saskatchewan The CNSC was informed by Cameco, in accordance with the regulations and their licence conditions, of an event at Cameco’s Rabbit Lake Operation in northern Saskatchewan involving a fall of rock that was discovered in a tunnel after reopening an inactive area of the Eagle Point mine. Cameco is currently undertaking an assessment of the event. As a precautionary measure, non-essential personnel were removed from the mine and activities were restricted to ensure the safety of mine workers while the condition of the affected area is being assessed. This was a non-radiological event with no impact to health and safety or the environment. Read Cameco’s news release.
July 16, 2015 July 18, 2015 AREVA McClean Lake Mill, Northern Saskatchewan

The CNSC was informed by AREVA, in accordance with the regulations and its licence conditions, that a worker was injured at AREVA’s McClean Lake mill located in northern Saskatchewan. The individual was working on a high temperature dryer when he came in contact with heated uranium product resulting in a minor injury. No uranium was released into the environment as a result of this event. CNSC staff are reviewing AREVA’s initial reports and corrective actions taken to prevent a similar occurrence. This event will be discussed at an upcoming public Commission meeting. Visit AREVA’s website for more information on this event.

July 9, 2015 Cameco

Key Lake Mill,

McArthur River Mine,

Cigar Lake Mine, and

Rabbit Lake Mine and Mill, Northern Saskatchewan

Cameco update on the Saskatchewan forest fire situation (Source: Cameco)

Visit Cameco’s Facebook page for the latest updates on the fire and operations.

February 16, 2015 March 3, 2015 Cameco Key Lake Mill, Northern Saskatchewan

The CNSC was informed by Cameco, in accordance with the regulations and their licence conditions, of an event at its Key Lake Mill involving uranium dust in a plant area normally free of uranium. No uranium was released into the environment as a result of this event. CNSC staff inspected the facility, reviewed Cameco’s initial reports, and are satisfied with the corrective actions taken to date. On March 17, the CNSC announced that it had issued a request for action to Cameco and Areva to prevent a similar occurence at other operating mill facilities. This event will be discussed at a public Commission meeting on March 25, 2015. As per the CNSC's requirements for public disclosure, Cameco has posted information regarding this event. Visit Cameco’s website for more information on this event.

January 14, 2015 January 16, 2015 Cameco Key Lake Mill, Northern Saskatchewan

The CNSC was informed by Cameco, in accordance with the regulations and their licence conditions, of an event at its Key Lake Mill involving uranium dust in a plant area normally free of uranium. No uranium was released into the environment as a result of this event. CNSC staff inspected the facility, reviewed Cameco’s initial reports, and are satisfied with the corrective actions taken to date. This event was discussed at a public Commission meeting on February 4, 2015. Visit Cameco’s website for more information on this event.

2014

Date of event Date of disclosure Licensee Facility Description
September 12, 2014 September 12, 2014 Cameco McArthur River Uranium Mine and Key Lake Mill, Northern Saskatchewan

The CNSC has been informed that Cameco has reached a tentative collective agreement with its unionized employees the McArthur River mine and Key Lake mill operations. Strike action has ended and preparations are underway to resume uranium production. CNSC staff will monitor the restart of operations to ensure the safety of workers, the public and the environment. Visit Cameco's website for more information.

August 27, 2014 August 27, 2014 Cameco McArthur River Uranium Mine and Key Lake Mill, Northern Saskatchewan The CNSC has been informed, in accordance with the regulations, of a union strike notice affecting the operation of the McArthur River Mine and the Key Lake Mill operations. Cameco Corporation has initiated a shutdown and will cease production at those sites if the strike occurs.

As part of the CNSC's regulatory oversight, CNSC staff have previously reviewed Cameco's strike contingency plans and found these to be satisfactory.  CNSC staff will continue to monitor the situation and the implementation of Cameco's contingency plans to ensure the safety of workers, the public and the environment. Visit Cameco's website for more information.
July 16, 2014 July 16, 2014 Cameco Cigar Lake Uranium Mine, Northern Saskatchewan Cameco provides update on the Cigar Lake Uranium Mine (Source: Cameco)
March 13, 2014 March 13, 2014 Cameco Cigar Lake Uranium Mine, Northern Saskatchewan Cameco begins ore production at the Cigar Lake Uranium Mine (Source: Cameco)

2013

Date of event Date of disclosure Licensee Facility Description
December 2, 2013 December 9, 2013 Cameco Key Lake Mill, reverse osmosis plant, Northern Saskatchewan Cameco reported that operational difficulties at its Key Lake Milll reverse osmosis plant resulted in a short term release of treated water (permeate water) with a slightly increased pH level. Visit Cameco's website for more information.

Uranium Processing and Fuel Fabrication Facilities

2016

Date of event Date of disclosure Licensee Facility Description
April 1, 2016 April 1, 2016 Cameco Port Hope Conversion Facility (PHCF), Ontario Cameco reported to the CNSC, as per regulatory requirements, that there was a spill of nitric acid solution within its Port Hope Conversion Facility. The spill was quickly detected and contained. This was a non-radiological event, with no significant impact on the local environment. CNSC staff are reviewing Cameco's initial reports and corrective actions.

Visit Cameco's website for more information.

February 4, 2016 February 5, 2016 Cameco Port Hope Conversion Facility (PHCF), Ontario

Cameco reported to the CNSC, as per regulatory requirements, that there was a small unplanned release of fluorine gas within its Port Hope Conversion Facility. The release was quickly detected and stopped, and emergency ventilation was activated. The plant was shut down as a precaution and later restarted.

This was a non-radiological event, with no measurable impact on the local environment. CNSC staff are reviewing Cameco's initial reports and corrective actions.

2015

Date of event Date of disclosure Licensee Facility Description
December 23, 2015 December 24, 2015 GE Hitachi Nuclear Energy Canada Inc. (GEH-C) Nuclear fuel fabrication facility, Toronto, Ontario GE Hitachi Nuclear Energy Canada Inc. (GEH-C) reported that a fire alarm was triggered at GEH-C’s Toronto plant as a result of work being done on an elevator. Toronto Fire Services responded to the alarm and verified that there was no fire. Visit GEH-C’s website for more information.
August 6, 2015 August 6, 2015 Nordion (Canada) Inc. Nuclear substance processing facility, Kanata, Ontario The CNSC was informed by Nordion (Canada) Inc., in accordance with the regulations and Nordion’s licence conditions, of a fire in the operations building at its Kanata facility. The building was evacuated and Ottawa Fire Services quickly had the fire under control. This was a non-radiological event with no injuries and no impact to worker and public health and safety or the local environment. A CNSC inspector is on site and will continue to monitor the situation. Nordion processes nuclear substances (radioisotopes) for medical and industrial applications. This event will be discussed at a Commission hearing on August 19, 2015. As per the CNSC's requirements for public disclosure, Nordion has posted information regarding this event. Visit Nordion’s website for more information.
July 7, 2015 July 8, 2015 Cameco Port Hope Conversion Facility (PHCF), Ontario The CNSC was informed by Cameco, in accordance with the regulations and Cameco’s licence conditions, of a non-routine event at its Port Hope Conversion Facility, where liquid discharges from a wastewater evaporator stack produced a dry, white substance containing uranium and calcium over portions of a building and the ground. Cameco reports no measurable impact to the environment resulting from this event. CNSC staff will inspect the facility, as well as review Cameco’s initial reports and corrective actions taken. As per the CNSC's requirements for public disclosure, Cameco has posted information regarding this event. Visit Cameco’s website for more information.
February 17, 2015 February 17, 2015 GE Hitachi Nuclear Energy Canada Inc. (GEH-C) Nuclear fuel fabrication facility, Toronto, Ontario GEH-C reported a leak in a fire sprinkler water pipe. Visit GEH-C’s website for more information.

2014

Date of event Date of disclosure Licensee Facility Description
November 26, 2014 November 28, 2014 Cameco Port Hope Conversion Facility (PHCF), Ontario Cameco reported, to the CNSC, as per regulatory requirements, that there was a small release of anhydrous hydrogen fluoride (AHF) within its Port Hope Conversion Facility.

This was a non-radiological event, resulting in no impact to the public or the environment. Employees working in the area at the time of the release received medical attention and have since returned to work. CNSC staff will be on-site to verify the Cameco’s interim corrective measures to prevent a similar occurrence. The event will be discussed at the next public meeting of the Commission on December 18, 2014.  Please visit Cameco’s website for more information on this event.

October 7, 2014 October 17, 2014 Cameco Port Hope Uranium Conversion Facility (PHCF), Ontario Cameco reported that an analysis of cooling water discharge on October 7, 2014 indicated that the north cooling water discharge did not meet one of the testing requirements. Visit Cameco's website for more information.
September 15, 2014 September 15, 2014 GE Hitachi Nuclear Energy Canada Inc. (GEH-C) Nuclear fuel fabrication facility, Toronto, Ontario GEH-C released a statement on a worker injury. Read GEH-C's statement (PDF) for more information.
September 5, 2014 September 5, 2014 Cameco Port Hope Uranium Conversion Facility (PHCF), Ontario Cameco reported that in September 2014, a team of officials from the U.S. Department of Energy will be conducting a series of experimental security tests at PHCF. Although most activity will be occurring on site, some elements of the program will have an off-site impact, such as overhead flights and temporary monitoring stations at various locations in the region. Specific details about the DOE project and technology involved are considered classified. Visit Cameco's website for more information.
January 28, 2014 February 5, 2014 Cameco Port Hope Uranium Conversion Facility (PHCF), Ontario The CNSC sent a request for information, under subsection 12(2) of the General Nuclear Safety and Control Regulations, to Cameco regarding a potentially unsafe valve configuration that resulted in a manual shutdown of its PHCF. CNSC's on-site inspections and investigation of this incident verified that Cameco has implemented adequate interim actions to prevent a similar event. On February 10, 2014, the CNSC permitted Cameco to restart the facility. For more information, read our Regulatory Action page.

2013

Date of event Date of disclosure Licensee Facility Description
July 4, 2013 July 26, 2013 Camecofuel_services Port Hope Uranium Conversion Facility (PHCF), Ontario Cameco reported that there was an exceedance of a monthly action level for fenceline gamma radiation at one of its 18 monitoring locations at its PHCF. Action levels are established to provide early warning to the operator to prevent an exceedance of licence release limits. Cameco has since removed the source of radiation and put in place increased monitoring at the location of the event. CNSC staff reviewed this event as part of a scheduled inspection on July 8th, 2013. CNSC staff is satisfied with the interim corrective actions put in place by PHCF. There is no impact to the public or the environment due to this event. The radiation dose to the public remains well below the regulatory limit of 1 mSv/year. For more information, read Cameco's report (Source: Cameco)
July 8, 2013 July 11, 2013 GE Hitachi Nuclear Energy Canada Inc. (GEH-C) Nuclear fuel fabrication facility, Toronto, Ontario GE Hitachi Nuclear Energy Canada Inc. not impacted by heavy rainfall event(source: GEH-C, PDF)
June 14, 2013 June 14, 2013 GE Hitachi Nuclear Energy Canada Inc. (GEH-C) Nuclear fuel fabrication facility, Toronto, Ontario Fire alarm triggered at GE Hitachi Nuclear Energy Canada Inc.(source: GEH-C, PDF)

Nuclear power plants

2016

Date of event Date of disclosure Licensee Facility Description
February 25, 2016 February 25, 2016 New Brunswick Power (NB Power) Point Lepreau Generating Station, New Brunswick The Canadian Nuclear Safety Commission (CNSC) was informed on February 25, 2016 of a fire alarm at the Point Lepreau Generating Station (PLGS) triggered by a lightning strike near a service building. PLGS is currently operating at 100 percent power in a safe and steady state. CNSC inspectors are onsite and monitoring PLGS’s response to the event.

There are no safety concerns for members of the public or workers.

As per CNSC's requirements for public disclosure, NB Power has posted information about this event. Visit NB Power's website for more information.

February 12, 2016 February 15, 2016 Bruce Power Bruce B Nuclear Generating Station, Ontario The CNSC was informed by Bruce Power, in accordance with its licence conditions, that an employee was injured outside the Bruce B Nuclear Generating Station. The employee received first aid from Bruce Power emergency staff and was transported by ambulance to a local hospital for treatment for his injury. Visit Bruce Power’s website for more information on this event.
February 1, 2016 February 2, 2016 Bruce Power Bruce B Nuclear Generating Station, Ontario

The CNSC was informed by Bruce Power, in accordance with its licence conditions, that a worker was injured at the Bruce B Nuclear Generating Station. The individual was performing work as part of the Unit 8 planned maintenance outage when the injury occurred. This event occurred in the Turbine Hall, which is located in a non-radiological area of the station. There is no impact to the health and safety of the public or the environment due to this event. CNSC staff are reviewing Bruce Power’s initial reports and corrective actions taken. This event will be discussed at an upcoming public Commission meeting.

Visit Bruce Power’s website for more information on this event.

2015

Date of event Date of disclosure Licensee Facility Description
October 23, 2015 October 23, 2015 Bruce Power Bruce A Nuclear Generating Station, Ontario On Friday, October 23, 2015, Bruce Power informed the CNSC that staff access to Bruce A was limited in order to monitor and manage a small amount of moderator water on the floor within the station. Staff responded by monitoring and cleaning up the small amount of water, while appropriately minimizing access to the area. There was no impact on the safety of the public, employees or the environment. Visit Bruce Power's website for more information.
October 1 and 2, 2015 October 5, 2015 Bruce Power Bruce A and B Nuclear Generating Station, Ontario Bruce Power informed the CNSC that Units 3 and 8 were temporarily removed from service for maintenance repairs. Both shutdowns were conducted in a controlled manner, and there was no impact on the safety of the public, employees or the environment. Unit 4 is currently undergoing a planned maintenance outage. As per CNSC's requirements for public disclosure, Bruce Power has posted information regarding these events. Visit Bruce Power's website for more information.
September 28, 2015 September 30, 2015 Ontario Power Generation (OPG) Darlington Nuclear Generating Station, Ontario On Monday, September 28, 2015, the Canadian Nuclear Safety Commission (CNSC) was notified by Ontario Power Generation (OPG) that smoke, caused by an electrical short on the conventional side of the Darlington Nuclear station, activated the fire alarm system. Staff responded and resolved the electrical issue. There was no impact on the safety of the public, employees or the environment. Units 1, 2, 3 and 4 were in a planned station maintenance outage during the incident. In accordance with the CNSC's requirements for public disclosure, OPG has posted information about this event. Visit OPG’s website for more information.
September 24, 2015 September 24, 2015 New Brunswick Power (NB Power) Point Lepreau Generating Station, New Brunswick On Thursday, September 24, 2015, the Canadian Nuclear Safety Commission (CNSC) was notified by NB Power that its Point Lepreau Generating Station is temporarily offline to facilitate repairs on one of the station's stand-by safety systems. This work has no impact on nuclear safety. As per CNSC's requirements for public disclosure, NB Power has posted information about this event.  Visit NB Power's website for more information.
September 16, 2015 September 22, 2015 Ontario Power Generation (OPG) Pickering Nuclear Generating Station, Ontario

On Wednesday, September 16, 2015, the CNSC was notified by Ontario Power Generation that Unit 4 at the Pickering Nuclear Generating Station was brought off-line for a forced outage after experiencing a failure in the turbine governor valve trip circuit. There was no threat to the safety of the public, employees or the environment and no radioactive systems are located in this area of the station.  As per CNSC's requirements for public disclosure, OPG has posted information about this event.  Visit Ontario Power Generation’s  website for more information.

May 28, 2015 May 28, 2015 New Brunswick Power (NB Power) Point Lepreau Generating Station, New Brunswick On Thursday, May 28, 2015, the Canadian Nuclear Safety Commission (CNSC) was notified by NB Power that its Point Lepreau Generating Station is temporarily offline to facilitate testing and analysis of the turbine system. This work has no impact on nuclear safety. As per CNSC's requirements for public disclosure, NB Power has posted information about this event.  Visit NB Power’s website for more information.
April 14, 2015 April 15, 2015 Ontario Power Generation (OPG) Darlington Nuclear Generating Station, Ontario OPG reported a leak of heavy water during planned maintenance activities on Unit 2 at the Darlington Nuclear Generating Station. The unit was safely shut down, and the heavy water was contained and recovered. There was no impact on the environment or the public. Visit OPG’s website for more information.
April 14, 2015 April 15, 2015 Hydro-Québec Gentilly-2 Nuclear Generating Station On Monday, April 14, 2015, the Canadian Nuclear Safety Commission (CNSC) was notified by Hydro-Québec that water had accumulated on the access road leading to the Gentilly-2 nuclear generating station (NGS). This accumulation was caused by an ice dam on the Gentilly River located nearby. There is no impact to the NGS, and the water is slowly receding. Visit Hydro-Québec’s website for more information on this event.
March 18, 2015 March 18, 2015 New Brunswick Power (NB Power) Point Lepreau Generating Station, New Brunswick On Wednesday, March 18, 2015, the Canadian Nuclear Safety Commission (CNSC) was notified by NB Power that its Point Lepreau Generating Station will be shut down for approximately two weeks. The temporary shutdown is to perform repairs to a fueling machine. This maintenance work, which has no impact on nuclear safety, will be discussed at the next public Commission meeting on March 25, 2015. As per CNSC's requirements for public disclosure, NB Power has posted information about this event. Visit NB Power’s website for more information.
January 30, 2015 February 2, 2015 Ontario Power Generation (OPG) Darlington Nuclear Generating Station, Ontario OPG reported that a worker was injured at its Darlington Nuclear Generating Station. Visit OPG’s website for more information.

2014

Date of event Date of disclosure Licensee Facility Description
December 10, 2014 December 12, 2014 Ontario Power Generation (OPG) Pickering Nuclear Generating Station, Ontario On Wednesday, December 10, 2014, the Canadian Nuclear Safety Commission (CNSC) was notified of a non-radiological event at the Pickering Nuclear Generating Station, which is operated by Ontario Power Generation (OPG). The event involved oil leak into Lake Ontario. OPG notified regional and provincial authorities as per established protocols. The event, which had no impact on nuclear safety, will be reported at the next public meeting of the Commission on December 17, 2014. As per CNSC's requirements for public disclosure, OPG has posted information regarding this event. Visit OPG's website for more information on this event.
November 21, 2014 November 24, 2014 Ontario Power Generation (OPG) Pickering Nuclear Generating Station, Ontario On Friday November 21, 2014, the Canadian Nuclear Safety Commission (CNSC) was notified of an event at the Pickering Nuclear Generating Station, which is operated by Ontario Power Generation (OPG). The event, which involved a leak of heavy water within containment, occurred at Unit 7 during a planned maintenance outage while the reactor was shut down. The leak was isolated and the heavy water collected. There were no safety concerns and never any risk to the public, workers or the environment. OPG will have to obtain the CNSC's approval before restarting the reactor. The event will be discussed at the next public meeting of the Commission on December 17, 2014. As per CNSC's requirements for public disclosure, OPG has posted information regarding this event. Visit OPG's website for more information on this event.
August 29, 2014 September 5, 2014 Ontario Power Generation (OPG) Pickering Nuclear Generating Station, Ontario OPG reported that during a routine inventory inspection, OPG staff discovered materials that had not been accurately recorded on an inventory list required to be updated annually under OPG's radiation protection program. The items were mock fuel bundles for training and demonstration purposes that contained a small amount of natural uranium. They posed no health risk to staff or any member of the public and were locked in a secure area at all times. OPG is reviewing the internal inventory and reporting process, and has provided a courtesy notification to the Canadian Nuclear Safety Commission. Visit OPG's website for more information on this event.
August 15, 2014 August 18, 2014 Ontario Power Generation (OPG) Pickering Nuclear Generating Station, Ontario OPG reported that during routine equipment testing, approximately 450 litres of fire retardant fluid was spilled inside the turbine hall. Almost all of the fluid was contained and collected. However, subsequent testing showed a trace amount had made its way to a drainage sump which eventually leads to Lake Ontario. The trace amount detected through testing is much lower than allowable regulatory limits. All required notifications were made including to the Ministry of Environment. Visit OPG's website for more information on this event.
August 8, 2014 August 12, 2014 Ontario Power Generation (OPG) Pickering Nuclear Generating Station, Ontario OPG reported that that while Pickering staff were filling a tank with heavy water when approximately 500 ml was released through a valve. Staff contained the water, cleaned the area and repaired the valve. There was no impact to employees and no release to the environment. Visit OPG's website for more information on this event.
August 6, 2014 August 7, 2014 Ontario Power Generation (OPG) Darlington Nuclear Generating Station, Ontario OPG reported an unintended release of generator seal oil to Lake Ontario, from a Unit 3 heat exchanger that is part of the non-nuclear systems. The leak has since been identified and stopped. There was no radiological release to the environment. Visit OPG's website for more information on this event.
July 14-15, 2014 July 14, 2014 New Brunswick Power (NB Power) Point Lepreau Generating Station, New Brunswick NB Power reported that the Point Lepreau Nuclear Response Force team and the Canadian Armed Forces Combat Training Center's Infantry team would be participating in a training exercise in the vicinity of Point Lepreau Generating Station from the evening of July 14 to July 15, 2014. Visit NB Power's website for more information
June 17, 2014 June 17, 2014 Bruce Power Bruce A and B Nuclear Generating Station, Ontario

Bruce Power issued a news release following a thunderstorm to inform the public that it had no impacts on its operations.  Visit Bruce Power's website for more information on this event —  No impacts at Bruce Power following thunderstorm.

May 23, 2014 May 29, 2014 Hydro-Québec Gentilly-2 Nuclear Generating Station Hydro-Québec informed the CNSC that cracks were noticed on the concrete ring beam of the reactor building. These cracks are restricted to the upper (decorative) layer of the concrete. Pieces of concrete were safely removed by specialized workers on May 31 and June 1. The situation does not pose any risk to people or the environment.
May 9, 2014 May 9, 2014 Ontario Power Generation (OPG) Darlington Nuclear Generating Station, Ontario OPG informed the CNSC of a release of fire retardant fluid (oil) to Lake Ontario. The source of the release was identified and closed. There was no radiological release to the environment. Visit OPG's website for more information on this event.
April 25, 2014 April 28, 2014 New Brunswick Power (NB Power) Point Lepreau Generating Station, New Brunswick NB Power informed residents of emergency response vehicles participating in emergency drills, Monday April 28 near the Point Lepreau Generating Station.
April 12, 2014 April 12, 2014 Hydro-Quebec Gentilly-2 Nuclear Generating Station The CNSC was informed by Hydro-Quebec of higher water levels than usual near the Gentilly-2 nuclear power plant located in Becancour, Quebec. The plant has a safety flood barrier in place, however, currently the water level is nowhere near the level of the barrier. The reactor has been shut down since December 2012 and is fully defuelled. There is no threat to the public or the environment.
January 31, 2014 January 31, 2014 Bruce Power Bruce A and B Nuclear Generating Station, Ontario Bruce Power informed the CNSC that Unit 1 was proactively taken offline in order to isolate and address a mineral oil leak that was detected in a transformer's heat exchanger. The heat exchanger uses water to cool oil in the transformer. A minor amount of mineral oil mixed with water was released outside the station. Visit Bruce Power's website for more information on this event.
January 15, 2014 January 14, 2014 Ontario Power Generation (OPG) Pickering Nuclear Generating Station, Ontario OPG informed the CNSC of spill of approximately 200 kg of heavy water on the floor of the unit 4 reactor building. There was no release to the environment or impact for the safety of workers. Visit OPG's website for more information on this event.
Not applicable January 16, 2014 New Brunswick Power (NB Power) Point Lepreau Generating Station, New Brunswick NB Power informed the public that two turbine rotors, weighing about 130 tonnes each, will be transported from the Port at West Saint John to the Point Lepreau Generating Station.

2013

Date of event Date of disclosure Licensee Facility Description
November 16, 2013 November 18, 2013 Ontario Power Generation (OPG) Pickering Nuclear Generating Station, Ontario OPG reported a discharge of lubricating oil on a heat exchanger on the conventional side of the Pickering station. No radioactive systems are located in this area of the station. The equipment has been removed from service to prevent further discharge. Investigation determined that approximately 750 litres of oil may have entered the lake over a period of approximately three weeks. Visit OPG's website for more information on this event.
November 3, 2013 November 4, 2013 New Brunswick Power (NB Power) Point Lepreau Generating Station, New Brunswick NB Power informed the CNSC that a release of water containing a small quantity of hydrazine had occurred. The leak has been isolated and contained. Hydrazine is a non-radioactive product, used to prevent corrosion in the steam generators.
June 8, 2013 June 11, 2013 Bruce Power Bruce A and B Nuclear Generating Station, Ontario Bruce Power reported that during Unit 8 outage activities, a small amount (about four tablespoons) of water containing trace amounts of hydrazine, leaked into a floor drain. Hydrazine is a non-radioactive chemical used to reduce corrosion. Visit Bruce Power's website for more information on this event
February 6, 2013 February 6, 2013 New Brunswick Power (NB Power) Point Lepreau Generating Station, New Brunswick NB Power posted an update on the preliminary findings of the site-specific seismic hazard assessment. Visit NB Power’s web site for more information.
January 1, 2013 January 2, 2013 Ontario Power Generation (OPG) Pickering Nuclear Generating Station, Ontario OPG reported that a fire was extinguished on the conventional side of the plant's unit 1. Visit OPG's website for more information on this event.

Research Reactors

2016

Date of event Date of disclosure Licensee Facility Description
April 26, 2016 May 5, 2016 Canadian Nuclear Laboratories (CNL) ZED-2 Research Reactor CNL reported to the Canadian Nuclear Safety Commission (CNSC) that the overflow of a heavy water dump tank at the ZED-2 low power research reactor resulted in heavy water flowing into the ventilation ducts. The heavy water evaporated and was released through the ductwork to the environment. There was no risk to workers, the public or the environment as a result of this event.

In accordance with CNSC requirements, an investigation into this incident has been initiated by CNL.

CNSC staff will be reviewing the results of this investigation.

This event will be discussed at a public Commission meeting after review of the investigation.

For more information visit CNL’s website.

April 19, 2016 April 27, 2016 Canadian Nuclear Laboratories (CNL) Chalk River Laboratories (CRL) CNL reported to the CNSC that an incident occurred at its Chalk River Laboratories during the loading of a fuel basket containing spent fuel bundles from NRX (National Research Experimental).‎ The integrity of the load was not compromised, and there was no damage to the fuel or releases of any kind.‎ There was no risk to workers, the public or the environment as a result of this event.

An investigation into this incident has been initiated by CNL. The CNSC will be reviewing the results of this investigation.

For more information visit CNL’s website.

January 18, 2016 January 21, 2016 Canadian Nuclear Laboratories (CNL) Chalk River Laboratories (CRL)

CNL reported to the CNSC that an incident occurred during a security-related training exercise at its Chalk River Laboratories.

No workers were injured. An investigation into this incident has been initiated by CNL. The CNSC will be reviewing the results of this investigation.

This was a non-radiological event with no impact to the health and safety of the public or the environment.

For more information visit CNL’s website.

2015

Date of event Date of disclosure Licensee Facility Description
October 28, 2015 December 17, 2015 Canadian Nuclear Laboratories (CNL) Chalk River Laboratories (CRL)

In accordance with regulatory requirements, on December 17 the CNSC was informed of an occurrence at CNL’s Chalk River Laboratories involving the failure of a fuel caddy during the preparation of National Research Experimental fuel assemblies for transport of fuel to the USA (as part of the repatriation project under the Global Threat Reduction Initiative).‎ The integrity of the transport package was not compromised, and there was no damage to the fuel or releases of any kind.‎ There was no risk to the public or the environment as a result of this occurrence.

CNSC staff will discuss preliminary findings of its review of the reports submitted to the CNSC during a status report at the January 28, 2016, public Commission meeting.

June 26, 2015 June 26, 2015 Canadian Nuclear Laboratories (CNL) Canadian Nuclear Laboratories (CNL) Canada’s Minister of Natural Resources announced that the Government of Canada has selected Canadian National Energy Alliance (CNEA) as the preferred bidder to manage and operate CNL, a subsidiary of Atomic Energy of Canada Limited (AECL). Read Natural Resources Canada’s news release for more information.
April 12, 2015 April 14, 2015 Canadian Nuclear Laboratories (CNL) Chalk River Laboratories (CRL) CNL reports that the National Research Universal (NRU) reactor will enter its annual planned 30-day extended outage on April 12, 2015. For more information visit CNL’s website.

2014

Date of event Date of disclosure Licensee Facility Description
November 28, 2014 December 1, 2014 Canadian Nuclear Laboratories(CNL) Chalk River Laboratories, Ontario CNL reported a worker was injured during an industrial incident that occurred on a construction site at its Chalk River Laboratories. Visit CNL’s website for more information.
October 8, 2014 October 10, 2014 McMaster University McMaster Nuclear Research Reactor McMaster University informed the CNSC that an error occurred during a routine refuelling of its research reactor, resulting in an unscheduled shutdown of the reactor. There were no impacts to the public, or the environment, no injuries to workers, and the reactor was not impacted. The CNSC has reviewed the required safety assessment provided by McMaster in support of its request to restart the reactor. CNSC staff are satisfied with the safety case presented and with the immediate corrective actions taken by McMaster to reduce the likelihood of a similar event. Based on these assessments, the CNSC is permitting McMaster to restart its reactor. For more information visit McMaster's website.
August 11, 2014 August 12, 2014 Atomic Energy of Canada Limited (AECL) Chalk River Laboratories, Ontario AECL informed the CNSC of a safety alarm sounding at its Nuclear Fuel Fabrication Facility. After responding to the safety alarm, AECL personnel determined that the alarm conditions were false. For more information please visit the AECL web site.
June 13, 2014 July 3, 2014 Atomic Energy of Canada Limited (AECL) Chalk River Laboratories, Ontario AECL reported a loss of halocarbon refrigerant at their Thermalhydralics facility. The cause of the event is currently under investigation. For more information please visit the AECL web site.

2013

Date of event Date of disclosure Licensee Facility Description
November 22, 2013 November 23, 2013 Atomic Energy of Canada Limited (AECL) Chalk River Laboratories, Ontario AECL has completed repair activities and resumed production of the medical isotope molybdenum-99. For more information please visit the AECL websitefor 131123.
November 19, 2013 November 19, 2013 Atomic Energy of Canada Limited (AECL) Chalk River Laboratories, Ontario AECL reported an unplanned interruption to the Canadian supply of the medical isotope molybdenum-99 and will be unable to meet its planned isotope deliveries for the week ending November 23. For more information please visit the AECL websitefor 131119.
August 20, 2013 August 22, 2013 Atomic Energy of Canada Limited (AECL) Chalk River Laboratories, Ontario

AECL reported that during normal work, a spill of heavy water occurred from the Fuel Rod Flask. The Fuel Rod Flask is equipment utilized in the fuelling of the reactor.

CNSC on-site inspectors have confirmed that appropriate actions were taken, and will continue to monitor AECL's on going clean-up activities. CNSC staff provided a verbal report to the Commission at the public meeting on August 22, 2013. For more information please visit the AECL websitefor 130822.

May 16, 2013 Atomic Energy of Canada Limited (AECL) Chalk River Laboratories, Ontario AECL provides update on NRU Planned Outage Activities - NRU reactor returned to operation as planned (Source: AECL)
May 15, 2013 Atomic Energy of Canada Limited (AECL) Chalk River Laboratories, Ontario AECL reported that they had discovered that 7,000 dose records for the first quarter of 2013 had been filed 13 days late with Health Canada's National Dose Registry (NDR). AECL's licence requires that these records be filed with the NDR no later than 30 days after the end of each quarter. To prevent recurrence of this problem, AECL will train more staff to carry out the filing of dose records with the NDR and upgrade its computer systems.
April 8, 2013 Atomic Energy of Canada Limited (AECL) Chalk River Laboratories, Ontario

AECL discovered that 1,650 dose records had not been submitted to the National Dose Registry (NDR) between 2009 and 2012. Doses were estimated and manually entered into AECL's corporate dosimetry system. However, these doses were not submitted to the NDR. There is no health impact and none of the doses exceed any regulatory dose limit or any action level. AECL is investigating and is required to report to the CNSC by May 8, 2013. The report will include details of the causes and consequences of the event and any remedial actions taken or intended.

Nuclear Substance Processing Facilities

2014

Date of event Date of disclosure Licensee Facility Description
November 4, 2014 November 13, 2014 SRB Technologies (Canada) Inc. (SRB) Nuclear substance processing facility, Pembroke, Ontario SRB reported that its action level for total tritium released into the atmosphere had been exceeded. Action levels are established to provide early warning to the operator to prevent an exceedance of licence release limits. See SRB’s letter to the CNSC for more information.
August 6, 2014 August 6, 2014 Nordion Nuclear Substance Processing Facility, Ottawa, Ontario Nordion announces completion of acquisition by Sterigenics(Source: Nordion)
March 28, 2014 March 28, 2014 Shield Source Inc. (SSI) Tritium Light Source Processing Facility, Peterborough, Ontario CNSC announced its decision to issue a Licence to Abandon to Shield Source Inc. (SSI). As of April 1, 2014, SSI is no longer subject to the CNSC's regulatory requirements.
March 28, 2014 March 28, 2014 Nordion Nuclear Substance Processing Facility, Ottawa, Ontario

Sterigenics enters into definitive agreement to acquire Nordion (Source: Nordion)

2013

Date of event Date of disclosure Licensee Facility Description
December 5, 2013 Shield Source Inc. (SSI) Tritium Light Source Processing Facility, Peterborough, Ontario SSI provides update on clean-up activitiesShield Source Incorporated (Source: SSI)
March 4, 2013 Shield Source Inc. (SSI) Tritium Light Source Processing Facility, Peterborough, Ontario

SSI announced that they will not be renewing its nuclear processing licence and plan to apply for the necessary licensing to decommission the facility. The CNSC will provide regulatory guidance to the licensee throughout this process and continue its increased oversight at SSI to ensure the public and environment are protected.

SSI provides update on clean-up activitiesShield Source Incorporated elects not to renew Nuclear Processing Licence (source: SSI)

Radiation Device Licensees

2016

Date of event Date of disclosure Licensee Description
March 9, 2016 March 11,2016 West Fraser Mill Ltd CNSC licensee West Fraser Mill Ltd notified the CNSC of a fire at their Quesnel, BC mill occurring at 17:30 MST on March 9, 2016. Six nuclear gauges containing Cs–137, used for routine monitoring of industrial processes in the mill, were in the vicinity of the fire. An inspection and radiation survey of the gauges by the licensee indicates that the sources are intact and that the gauges were not damaged by the fire or heat. Pursuant to regulations, the gauges will be leak tested before being put back into service. The licensee appears to have properly implemented the emergency response provisions of the radiation safety manual referenced in its CNSC licence. CNSC staff are therefore satisfied that there is adequate protection for the environment and the health and safety of all persons.

Waste Management Facilities

2016

Date of event Date of disclosure Licensee Facility Description
March 31, 2016 April 19, 2016 Canadian Nuclear Laboratories (CNL) Port Granby Low-Level Radioactive Waste Management Facility, part of the Port Hope Area Initiative (PHAI) The CNSC was informed by the Port Hope Area Initiative Management Office of an unplanned release of untreated water into Lake Ontario during construction activities at the Port Granby Low-Level Radioactive Waste Management Facility. The impact to the environment is considered negligible, and there was no impact on workers and the public. CNSC staff will verify that all necessary corrective actions are carried out by CNL in order to prevent a similar occurrence. Visit PHAI’s website for more information.

2015

Date of event Date of disclosure Licensee Facility Description
April 29, 2015 June 5, 2015 Ontario Ministry of Environment and Climate Change Deloro closed mine site, Deloro, Ontario The CNSC was informed by the Ontario Ministry of Environment and Climate Change (MOECC), in accordance with the regulations and their licence conditions, of an event at the closed Deloro mine site. As a result of cleanup work at the site, there was an unplanned release of construction wastewater due to the collapse of a temporary aqua barrier. The released wastewater was non-radiological and no impact to the environment is anticipated as a result of this event. A CNSC inspector and staff visited the site and were not satisfied with the MOECC’s contingency plans to deal with the stability of aqua barriers. On June 5, the CNSC announced that it had issued an order to the MOECC to prevent a similar occurrence at the closed Deloro mine site. This event will be discussed at a public Commission meeting on June 17, 2015. Read the MOECC’s letter to key community stakeholders to learn more about the event and visit the MOECC website for information about the Deloro mine cleanup project.

Class II Nuclear Facilities

2016

Date of event Date of disclosure Licensee Facility Description
January 10, 2016 January 10, 2016 Winnipeg Regional Health Authority Winnipeg Cyclotron Facility The CNSC was informed that first responders were dispatched to the Winnipeg Cyclotron Facility (WCF), at 3:30 p.m. CST in response to a smoke alarm. First responders did not see either smoke or fire, and the incident was classified as a false alarm. Visit WCF’s website for more information.

2015

Date of event Date of disclosure Licensee Facility Description
January 12, 2015 January 22, 2015 Montreal Neurological Institute Isotope production facility, Montreal The CNSC has been informed that a possible overexposure of a nuclear energy worker has occurred at the Montreal Neurological Institute. The licensee has removed the individual from duties that could add to the dose, as required by section 16(b) of the Radiation Protection Regulations, and is conducting an investigation. The licensee has also filed a report with Quebec’s Commission de la santé et de la sécurité du travail. The CNSC will continue to report on the situation as further information becomes available.

Transport / In Transit events

2016

Date of event Date of disclosure Location Description
April 17, 2016 April 17, 2016 Highway 17 near Massey, ON The CNSC was informed on April 17, 2016 of a traffic accident involving a tractor trailer transporting uranium concentrate from Cameco’s Blind River refinery to its Port Hope conversion facility. The accident took place on the Trans-Canada Highway (Highway 17) near Massey, ON at around 8:30 a.m. There was no damage to the transport packages and therefore no impact to members of the public or the environment. Visit Cameco’s website for more information.
February 21, 2016 February 21, 2016 Bathurst Airport, New Brunswick The CNSC was informed on February 21, 2016 of a damaged package containing radioactive materials at the Bathurst Airport in New Brunswick. As a precaution, the aircraft was isolated and the airport was temporarily closed pending verification of the package condition.

It was confirmed that the package sustained only minor damage to the exterior box, and the container holding the nuclear substances within the package was undamaged. There was no release of radioactive material and no possibility of exposure to any workers.
January 11, 2016 January 11, 2016 Swift Current, SK Cameco notified the CNSC of a transport accident involving uranium yellowcake that took place on Highway 4 near Swift Current, SK. Cameco activated its approved Emergency Response Assistance Plan, as per procedures, and sent specialists onsite to assess the situation. CNSC inspectors were also dispatched to the accident site to oversee the licensee’s response.

The cleanup activities were completed on January 13, 2016, and the highway reopened. Cameco’s assessment revealed a minimal and contained spill of uranium yellowcake onsite. The spill was cleaned up, and a survey following the cleanup confirmed that there is no residual contamination. There was no impact to members of the public, the environment or first responders as a result of the spill.

The container that had suffered a breach was sealed and safely placed inside an overpack. It is now being transported to one of Cameco’s licensed facilities in Saskatchewan for repackaging before the shipment continues to Cameco’s Blind River Refinery in Ontario. A CNSC inspector oversaw all actions taken at the site, and the CNSC is satisfied that Cameco’s Emergency Response Assistance Plan was implemented properly and successfully. This accident will be discussed at the next Commission meeting to be held on January 28 at 9 a.m.

Closed and decommissioned mines and mills

2016

Date of event Date of disclosure Licensee Facility Description
May 24, 2016 May 25, 2016 Denison Mines Corp. Denison Mine, Quirke Lake, Ontario In accordance with the regulations and licence conditions, Denison Mines Corp. informed the CNSC that a small bush fire had occurred near its licensed area. The Elliot Lake Fire Department and Ontario Ministry of Natural Resources and Forestry responded and extinguished the fire. The fire had no radiological impact, nor did it cause any impact to the health and safety of workers or the public.