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Archived - CNSC extends OPG's operating licence until December 2015

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July 29, 2014

The Canadian Nuclear Safety Commission (CNSC) has extended for twelve months the power reactor operating licence for Ontario Power Generation's (OPG) Darlington Nuclear Generating Station (NGS) located in the municipality of Clarington, on the north shore of Lake Ontario.

As a result, the public hearing to consider the long term renewal of Darlington's operating licence, including the proposed refurbishment of all four Darlington NGS units, will take place in the summer and fall of 2015.

OPG had requested an extension to allow additional time to provide more comprehensive documentation, reflect new CNSC expectations and facilitate public engagement in the upcoming public hearing.

The Record of Proceedings, including Reasons for Decision from the hearing on the extension that was held July 23, 2014, has been published on the CNSC website.

The CNSC regulates the use of nuclear energy and materials to protect the health, safety and security of Canadians and the environment; to implement Canada's international commitments on the peaceful use of nuclear energy; and to disseminate objective scientific, technical and regulatory information to the public.

Quick facts

  • The power reactor operating licence for OPG's Darlington NGS was to expire on December 31, 2014. It is now valid until December 31, 2015.
  • The Darlington NGS counts four operating CANDU reactors, which started commercial operation between 1990 and 1993.
  • The CNSC has full-time staff at the Darlington NGS who perform inspections to evaluate operations and to verify compliance with regulatory requirements and licence conditions.


Aerial view of the Darlington Nuclear Generating Station

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Marc Drolet
Media and Community Relations
Canadian Nuclear Safety Commission

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