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A aerial view of the Pickering Nuclear Generating Station.

Pickering Nuclear Generating Station

Located in Pickering, Ontario (just east of Toronto), Ontario Power Generation’s Pickering Nuclear Generating Station (GS) is one of the largest nuclear stations in the world and has been safely and reliably providing Ontario with power for decades.

Learn more about this world-class facility, which features six operating CANDU® reactors (CANadian Deuterium Uranium), and accounts for approximately 14% of Ontario’s electricity needs, while generating power that is virtually emissions-free.

In this section

Pickering nuclear operations

3,100 Megawatts

Total output at Pickering

4,500 Jobs

Protected until 2024

$600 Million

In savings for Ontarians until 2024

14% Of

Ontario’s electricity is produced at Pickering

Pickering nuclear continued operations

A powerhouse of efficient energy generation, Pickering can be safely operated until 2024.

Doing so will create savings of $600 million for Ontarians and avoid 17 million tonnes of carbon emissions.

Further positive economic impacts can be reviewed in this April 2018 report from the Ontario Chamber of Commerce.

Continued operation of the Pickering Plant during refurbishments of other OPG facilities allows for a steady supply of power to Ontario.

The Canadian Nuclear Safety Commission (CNSC) renewed the operating licence for Pickering Nuclear in August, 2018 after extensive public review and consideration.

In a separate license, the CNSC renewed the operating licence for the Pickering Waste Management Facility until Aug. 31, 2028.

Our generating station

Pickering then and now

The first four Pickering Nuclear reactors went into service in 1971. In 1997, these reactors were placed in voluntary lay-up as part of our predecessor company Ontario Hydro's nuclear improvement program. In September 2003 and November 2005, Units 4 and 1 (respectively) were returned to commercial operation, with Units 2 and 3 staying in a safe shutdown state.

Units 5, 6, 7 and 8 at Pickering Nuclear continue to operate safely since 1983 when they first entered operations. They have a combined capacity of approximately 2,100 megawatts.

Recognized as safe and reliable

  • The nuclear industry uses every opportunity to learn and align with industry best practices, and we continually challenge ourselves to move the bar higher. In 2016, Pickering Nuclear welcomed an International Atomic Energy Agency (IAEA) Operational Safety Review Team (OSART) to assess safety performance and make recommendations and suggestions for improvement.

    In 2018, the OSART team returned for a follow-up review on Pickering’s progress. They concluded the plant has shown a strong commitment and made a tremendous effort to address the findings from the initial visit, and made further recommendations for areas that would further improve performance. See the IAEA news release here.

    These results have helped us continue to improve our record of safe operations and ensure we deliver on our commitment to secure Ontario’s clean power future. See the full OSART report.

  • In 2017, the CNSC awarded OPG's Pickering and Darlington stations its highest safety rating
  • Learn more about our commitment to safety at the Pickering Nuclear GS

Nuclear safety systems

Learn about the safety systems designed to keep you safe.