Pickering Nuclear Generating Station

OSART mission begins at Pickering Nuclear Generating Station

On September 19, 2016, Ontario Power Generation (OPG) announced the start of an Operational Safety and Review Team (OSART) mission led by the International Atomic Energy Agency (IAEA).

The OSART mission will review the Pickering Nuclear Generating Station’s operational safety performance. The team will use the IAEA’s safety standards to find areas where OPG could make improvements and to determine best practices within the international nuclear community.

The Pickering OSART mission is being conducted at the request of the Government of Canada and the Canadian Nuclear Safety Commission (CNSC).  

As part of the CNSC Integrated Action Plan on the Lessons Learned from the Fukushima Daiichi Nuclear Accident, the CNSC called for the IAEA to conduct OSART missions at all Canadian nuclear power plants, starting in 2015. While all plants are meeting current regulatory requirements, these missions provide opportunities for the nuclear industry to learn from best practices and to broaden its experience and knowledge. This will be the sixth mission in Canada since the IAEA program began in 1982. The Bruce B Nuclear Generating Station was the first to complete an OSART mission in accordance with the CNSC Integrated Action Plan on the Lessons Learned from the Fukushima Daiichi Nuclear Accident, in December 2015.


Ontario Power Generation (OPG) owns and is licensed to operate the Pickering Nuclear Generating Station, located in the municipality of Pickering on the north shore of Lake Ontario. OPG also operates a nuclear waste management facility at the station. The CNSC has full-time staff onsite who perform inspections to evaluate operations and to verify compliance with regulatory requirements and licence conditions.

Aerial view of the Pickering Nuclear Generating Station

Plant Information

Location: Pickering, Ontario
Operator: Ontario Power Generation
Reactor type: CANDU (CANada Deuterium Uranium)
Vendor: Atomic Energy of Canada Limited
Number of units: 8 reactors
Installed capacity: 3,100 MW
Status units 1 and 4: Operating
Status units 2 and 3: Safe storage
Status units 5, 6, 7 and 8: Operating
Licence issued: September 1, 2013
Licence expires: August 31, 2018
Start of commercial operation: Between 1971 and 1973 for Pickering units 1 to 4 and 1983 and 1986 for units 5 to 8
Special containment system: Common vacuum building maintained at negative atmospheric pressure
Licensing documentation: Request a copy of the Pickering licence and licence condition handbook by email

Latest CNSC Facility-Specific Announcements

Latest Licensee Public Disclosures

As part of CNSC's regulatory requirements, major licensees must have robust public information and disclosure programs in place. These programs, for nuclear power plants, include a disclosure protocol developed in consultation with community stakeholders.

Most recent disclosure

January 6, 2014: OPG reported a spill of water mixed with oil in a storage building. Some of the contaminated water may have entered the conventional sewage system and reached the local sewage treatment plant. Visit OPG's Web site for more information on this event and older ones.

A CNSC inspector at the Pickering Nuclear Generating Station. The white tower is part of an emergency injection cooling system, one of the facility's many safety features.

Regulatory Reporting

Other Key Topics