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Darlington’s refurbished Unit 2 reactor returns to service

Reactor now successfully connected to Ontario’s electricity grid with full power

Toronto – In a significant milestone for the Darlington Nuclear refurbishment project, Ontario Power Generation (OPG), along with its project partners and vendors, have successfully completed the refurbishment of Darlington Nuclear Generating Station’s Unit 2 reactor and have reconnected it to Ontario’s electricity grid at 100 per cent full power.

“This is a truly historic moment for Ontario. I want to thank our refurbishment team, project partners, vendors and construction building trades workers for more than 24 million hours worked safely and for returning Darlington’s Unit 2 reactor to the grid at a time of unprecedented circumstances,” said Ken Hartwick, OPG’s President and CEO. “This world-class project performance demonstrates the team’s expertise and their commitment to completing the four-unit refurbishment safely, with quality and on budget by end of 2026 as planned.”

“This is a tremendous achievement for OPG and our province. The refurbishment of OPG’s Darlington Nuclear Station will provide Ontario families and businesses with reliable and affordable electricity for years to come,” said Premier Doug Ford. “Thank you to the thousands of hardworking men and women for completing this first phase of the refurbishment.”

“Congratulations to OPG on this incredible milestone. The Darlington Nuclear refurbishment project is one of the world’s largest nuclear infrastructure projects and the timely completion of the Unit 2 reactor showcases Ontario’s position as a global leader in nuclear generation,” said Greg Rickford, Minister of Energy, Northern Development and Mines, and Minister of Indigenous Affairs. “OPG’s Darlington Nuclear Station is a critical part of our electricity system, producing affordable, reliable and GHG-emissions-free electricity to over two million homes each day.”

The four-unit Darlington refurbishment project, which began with Unit 2 in 2016 after nearly a decade of planning and preparation, required the support of hundreds of companies and thousands of workers within OPG and from across the province. The integrated team undertook more than 765,000 training hours in the project’s leading-edge mock-up and training facility to safely shut down, defuel, disassemble and reconstruct the reactor. This in-depth training enabled the team to practice complex tasks before performing them in the field, resulting in improved efficiencies. The project’s success was also aided by innovative technology and precision tooling delivered by hundreds of Ontario manufacturers.

With Darlington’s refurbished Unit 2 now operating at full capacity, OPG is one unit closer to extending the operating life of the station and providing another 30-plus years of clean, low-cost and reliable energy for Ontarians.

The 10-year refurbishment project, which is expected to generate a total of nearly $90 billion in economic benefits for Ontario and increase employment by an average of 14,200 jobs annually across the province, also plays a significant role in Ontario’s fight against climate change.

In response to the COVID-19 pandemic, OPG postponed the commencement of Unit 3 refurbishment from its scheduled start in May 2020, allowing the unit to continue delivering electricity to the grid. Subject to the status of the pandemic, OPG is preparing to resume the hiring of skilled trades workers and begin prerequisite activities this month to safely start this next phase on the project, which will require the continued support of our key project partners: CanAtom Power Group, GE Power, ES Fox, Black and McDonald Limited and BWXT Canada.

Learn more about the Darlington Nuclear Refurbishment Project.

OPG is the largest electricity generator in the province, providing almost half of the power Ontarians rely on every day. It is also one of the most diverse generators in North America, with expertise in nuclear, hydroelectric, biomass, solar and natural gas technologies.

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For further information, please contact:

OPG Media Relations
416-592-4008 or 1-877-592-4008
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