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Pickering Nuclear Generating Station

June 2023: Ontario Power Generation has submitted an application to extend commercial operation of Units 5–8 at the Pickering Nuclear Generation Station until December 31, 2026. The current licence does not allow commercial operation beyond December 31, 2024.

A public Commission hearing will be held June 19-20, 2024.

Ontario Power Generation (OPG) owns and is licensed to operate the Pickering Nuclear Generating Station (NGS), located in the city of Pickering (Municipality of Durham) on the north shore of Lake Ontario.

OPG currently holds a 10-year operating licence for the Pickering NGS, which expires on August 31, 2028. The current licence does not allow operations beyond December 31, 2024.

View of the Pickering Nuclear Generating Station located beside Lake Ontario

Photo courtesy of Ontario Power Generation

Location: Pickering, Ontario
Licensee: 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
Units 2 and 3: Safe storage
Units 5, 6, 7 and 8: Operating
Licence issued: September 1, 2018
Licence expires: August 31, 2028
Start of operation: Between 1971 and 1973 for Pickering units 1 to 4 and 1983 and 1986 for units 5 to 8
Licensing documentation: Request a copy of Pickering Nuclear Generating Station licence and licence conditions handbook by email at
Facility website: Ontario Power Generation

Latest news

Regulatory actions

The CNSC posts regulatory enforcement actions taken to protect the health, safety and security of Canadians and the environment. Use the links below to find out more about any orders or penalties that have been placed on this licensee, if any.

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Licensees must report events and incidents involving licensed activities that could impact the health, safety and security of Canadians and the environment to the CNSC. Use the links below to find any information provided by this licensee, if any, as well as other public disclosures made by licensees.

View all nuclear-related events


  • December 12, 2016: CNSC staff present to Pickering City Council on the regulatory oversight for the Pickering Nuclear Generating Station and the upcoming relicensing process
  • October and November 2016: CNSC staff make several presentations in the community on the regulatory oversight of the Pickering Nuclear Generating Station

Protecting Canadians and the environment


The CNSC uses information provided by licensees to create our own reports assessing the environmental effects of nuclear facilities or licensed activities.

Health and safety

The CNSC oversees licensee emergency planning and works with other levels of government to ensure the health and safety of Canadians. We also conduct and review health studies on various areas associated with the production, possession or use of nuclear substances.

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