Our mission, vision & values

As Ontario’s largest clean electricity generator, see how our focus is on generating safe, efficient, and reliable energy.

About

Our partnerships & subsidiaries
Our subsidiaries & partnerships are helping us improve electricity generation, storage, and distribution technology to electrify life in one generation.
Who we are
Powering Ontario
Ontario’s need for power never takes a rest and neither does OPG — we’re on the job 24 hours a day, seven days a week, powering Ontario.
What we do
Public safety
We maintain a long-term commitment to the health, safety and energy needs of Ontarians, and it shows in everything we do.
Our commitments in action
Code of Business Conduct
We operate according to a Code of Business Conduct that ensures safety, integrity and efficiency for Ontario.
Governance & regulation

Workers in hard hats look out from the top of an open stairway before a huge Canadian flag in a nuclear plant.

Our role in the system

Our role is to help build a stronger Ontario by investing in clean, affordable power and energy solutions that help grow Ontario's economy.

Power generation

Nuclear power
Nuclear power plays an important role in Ontario and OPG’s energy mix, and its critical to helping us achieving our net-zero goals.
Our power
Educational resources
We support students and educators by providing learning resources developed specifically for teachers, young people and schools.
Our role in the system
Nuclear safety and emergency preparedness
We build safety into every step of our energy production and about our comprehensive emergency preparedness plans for Ontarians.
Our commitment to safety
- Nuclear safety and emergency preparedness
- Water safety

The pristine turbine hall at Darlington Nuclear Generating Station.

Darlington refurbishment project

Once complete, this project will enable production of clean, safe, low-cost, and emission-free electricity from Darlington for 30 more years.

Projects & services

Darlington SMR
The Darlington site is the only location in Canada licenced for new nuclear with a completed and accepted Environmental Assessment.
Our projects
Clean energy credits
With an extensive portfolio of clean energy generation across North America, OPG can offer environmental credits in both Canada and the US.
Our services
- Electrification services
- Clean energy credits

Ouimet Canyon Provincial Park, Thunder Bay, Ontario

Territorial acknowledgement

We respectfully acknowledge that our facilities are located within the traditional and treaty territory of Indigenous Nations and communities.

Community investment

The Power for Change Project was designed to give back to Ontario and to the communities where we operate, to help build a cleaner, more sustainable future for generations to come.

Communities

Territorial Acknowledgement
- Territorial Acknowledgement
  OPG respectfully acknowledges that the lands on which its generating stations and other assets are located are within the traditional and treaty territory of many Indigenous communities. Click to read more.
Central Ontario
- Central Ontario
  Central Ontario is home to 20 of our hydroelectric facilities, some of which, like our Sills Island Generating Station, have been part of their community for more than one hundred years.
Eastern Ontario
- Eastern Ontario
  Eastern Ontario is host to one gas-fired generating station and 15 of our hydroelectric generating stations on the St. Lawrence, Ottawa and Madawaska Rivers.
Northeastern Ontario
- Northeastern Ontario
  Northeastern Ontario contains 14 of our hydroelectric stations, including several we built or redeveloped through key partnerships with local Indigenous communities.
Northwestern Ontario
- Northwestern Ontario
  Northwestern Ontario hosts 11 of our hydroelectric stations as well as a former coal generating station that we converted to use biomass as fuel.
Southern Ontario - Durham Region
- Southern Ontario - Durham Region
  The golden horseshoe of Southern Ontario is home to key operations including our Darlington and Pickering nuclear stations in Clarington and Pickering.
Southern Ontario - Niagara Region
- Southern Ontario - Niagara Region
  The golden horseshoe of Southern Ontario is home to key operations including our iconic Sir Adam Beck hydroelectric stations in Niagara Falls.
Southwestern Ontario
- Southwestern Ontario
  Southwestern Ontario is host to our NSS - Western Waste Management Facility in Bruce County, our Eugenia hydroelectric station near Meaford, and our Nanticoke Solar Facility on the site of the former Nanticoke coal station.

Low water conditions at the tailrace of Lower Sturgeon hydroelectric generating station.

Hydroelectric Data Portal (water.opg.com)

Find water level and flow information from gauges on rivers where OPG operates hydroelectric stations in Ontario.

News & resources

Net-Zero News
A quarterly round-up of stories, news and profiles that highlight our best. See how we’re electrifying life in one generation.
Newsroom
Visitor centres
At our visitor centres, the public is welcomed to see how their power is made and learn about Ontario's low-carbon electricity system.
Educational resources
Hydroelectric Water Portal (water.opg.com)

Careers
Investors
Reports
OPG Websites

Our nuclear operating licences

In Canada, nuclear power is highly regulated to ensure it’s used safely and responsibly. A licence is required to construct and operate a nuclear power plant or waste management facility in Canada. For Ontario Power Generation (OPG) to maintain our licences, we must demonstrate that we continue to meet and exceed national safety standards.

CNSC licensing

All nuclear activities in Canada are strictly regulated by the Canadian Nuclear Safety Commission (CNSC); an independent federal regulator.

All OPG nuclear facilities, including the Darlington and Pickering power plants and our three waste management sites, must maintain an operating licence from the CNSC by demonstrating we continuously meet the requirements of the Nuclear Safety and Control Act, applicable regulations and the licence.

How do you become licenced?

Obtaining a licence from the CNSC is a challenging process. A licence is only issued when an applicant:

Is deemed qualified, after an extensive review, to carry out the operations as set out in the licence application.
Has clearly demonstrated that they will protect the health and safety of the public and the environment.
Has clearly demonstrated that they will maintain national security.
Has confirmed that they will adhere to all international obligations which Canada has agreed to.

CNSC staff work onsite doing daily field inspections, attending OPG meetings and are embedded in station operations to monitor ongoing activities, and ensure we are meeting licence requirements. We maintain open and transparent communication with the CNSC in order to demonstrate our continued commitment to public safety.

With over 50 years of experience operating nuclear stations in Ontario, we have built a reputation of safe operations and gained the trust of our communities.

Our licences

Learn more about our current operating licences across all of our facilities.

Darlington Nuclear Generating Station

Status: The Darlington Nuclear Generating Station (DNGS) is undergoing a multi-year refurbishment to safely extend operations for another 30 years. Learn more about the Darlington Refurbishment project.

Licence valid from: Jan. 1, 2016 to Nov. 30, 2025

Updates:

Darlington licence renewal

The Canadian Nuclear Safety Commission (CNSC) will hold a 2-part public hearing to consider an application from OPG  to renew its Power Reactor Operating Licence for the DNGS for a 30-year term (Dec. 1, 2025 to Nov. 30, 2055).

Hearing details:

March 26, 2025: To be determined (Nation Capital Region and/or virtually via Zoom)
June 24 to 26, 2025: To be determined (in the community in the vicinity of the DNGS and/or virtually via Zoom)

For more information on the licence renewal process, visit the CNSC webpage at www.cnsc-ccsn.gc.ca.

Nuclear isotopes

Lutetium-177 (Lu-177) and Yttrium (Y-90)

OPG has requested a licence amendment from the Canadian Nuclear Safety Commission that would authorize the production of Lutetium-177 (Lu-177) and Yttrium (Y-90) at the Darlington Nuclear generating station.

The CNSC will conduct a hearing in writing on OPG’s application to amend Darlington Nuclear Generating Station power reactor operating licence to allow production of additional medical isotopes in March 2025.

For more information on the licence amendment, visit the CNSC webpage.

Cobalt-60 (Co-60)

OPG has received a licence amendment from the Canadian Nuclear Safety Commission that authorizes the production of Cobalt-60 (Co-60) at the Darlington Nuclear generating station. Cobalt-60 is a radioisotope that has a range of beneficial industrial, medical and food processing applications and is harvested during planned outages from the irradiated reactor components.

Molybdenum-99 (Mo-99)

OPG has received a licence amendment from the Canadian Nuclear Safety Commission that authorizes the production of Molybdenum-99 (Mo-99) at the Darlington Nuclear generating station. Mo-99 is a much-needed medical isotope used in over 30 million procedures a year to detect illnesses like cancer and heart disease.

To read more about our current Darlington licences, visit the OPG Document Archive.

Pickering Nuclear Generating Station

Status: The current operating licence is valid until Aug. 31, 2028. Units 5 to 8 are now licensed to operate to Dec. 31, 2026, up to a maximum of 305,000 equivalent full power hours. Unit 1 was removed from service in October 2024. Unit 4 was removed from service in December 2024. Units 2 and 3 remain in safe storage.

Licence valid from: Sept. 1, 2018 to Aug. 31, 2028

Update: OPG has notified the Canadian Nuclear Safety Commission (CNSC) of its intention to apply for early renewal of the Pickering Nuclear Generating Station (NGS) Power Reactor Operating Licence (PROL), and the Pickering Waste Facility Operating Licence (WFOL), no later than September 2025. This application will include the planned refurbishment of Units 5 to 8, as well as the consolidation of the licensed activities authorized under the current Pickering WFOL with the Pickering NGS PROL.

Previous updates and more information:

OPG submitted a Licence Amendment Application and supplementary Commission Member Document to the Canadian Nuclear Safety Commission (CNSC). Following a two-day public hearing in June 2024, OPG was granted authorization to operate Pickering NGS Units 5 to 8 to the end of December 2026.
As directed by the CNSC, OPG presented a mid-term update on its licenced activities around the mid-point of its 10-year licence period.
OPG completed Periodic Safety Review PSR2-B; a reassessment of the results of the PSR2, which was completed in support of the 2018 re-licencing of Pickering NGS.
Recorded webcasts of public hearings are available on the CNSC website.
Learn more about Pickering’s operations or read our Environmental and Performance reports.
To read more about our Pickering licences, visit the OPG Document Archive.

NSS Western Waste Management Facility

Status: The Nuclear Sustainability Services - Western Waste Management Facility (NSS-WWMF) currently holds a ten-year operating licence.

Licenced valid from: June 1, 2017 to May 31, 2027

To read more about our current NSS Western Facility licence, visit the OPG Document Archive.

NSS Darlington Waste Management Facility

Status: The Nuclear Sustainability Services - Darlington Waste Management Facility (NSS-DWMF) currently holds a ten-year operating licence.

Licence valid from: May 1, 2023 to April 30, 2033

NSS Pickering Waste Management Facility

Status: The Nuclear Sustainability Services - Pickering Waste Management Facility (NSS-PWMF) currently holds a ten-year operating licence.

Licence valid from: April 1, 2018 to August 31, 2028

Updates:

OPG has submitted a licence amendment application to the Canadian Nuclear Safety Commission (CNSC) to construct and operate a new facility called the Pickering Component Storage Structure (PCSS). The PCSS would store Low and Intermediate Level Waste (L&ILW) generated by Pickering Nuclear Generating Station (NGS). This additional interim storage capacity, intended for radioactive component waste/material, will be required to support the refurbishment of Pickering NGS Units 5 through 8 and future Pickering NGS decommissioning activities. The CNSC will hold a Hearing in Writing in May 2025 to consider OPG’s application and written submissions from CNSC staff and intervenors. More information can be found on the CNSC website.

CNSC offers participant funding

Through its Participant Funding Program, the CNSC is offering funding to assist members of the public, Indigenous Nations and communities, and other stakeholders in participating in the CNSC hearing process by providing topic-specific interventions in writing to the Commission. The deadline for submitting a completed participant funding application form to the CNSC is Nov. 15, 2024.

Previous updates:

Following OPG's submission of a licence amendment application, the CNSC has authorized OPG to process and store a maximum of 100 dry storage containers containing used fuel that has been cooled in wet storage at the Pickering NGS for a minimum of six years. OPG was previously authorized to process and store dry storage containers containing used fuel that had been cooled in wet storage for at least 10 years. This decision follows a public hearing in writing with interventions in June 2024. In making its decision, the CNSC considered written submissions from OPG, CNSC staff and five intervenors. 

To read more about our NSS-PWMF licence, visit the OPG Document Archive.

Keeping the Public Informed

Nuclear Public Info. Disclosure & Transparency Protocol

Looking down on a worker in coveralls and a hard hat as they climb stairs.

Publication Date: March 01, 2024

Number of Pages: 2

Publisher: OPG

Nuclear Public Info. Disclosure & Transparency Protocol

Report Highlights:

Contact: Jennifer Knox
Director - Nuclear Stakeholder Relations
Questions? Use the form below

Publication Date: March 01, 2024

Number of Pages: 2

Publisher: OPG

Download PDF (106KB) - English

Report Highlights:

Contact: Jennifer Knox
Director - Nuclear Stakeholder Relations
Questions? Use the form below

Your safety is our #1 priority

Learn about how OPG is helping keep communities safe.

Territorial Acknowledgement

Central Ontario

Eastern Ontario

Northeastern Ontario

Northwestern Ontario

Southern Ontario - Durham Region

Southern Ontario - Niagara Region

Southwestern Ontario

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