Canadian Manufacturing

OPG’s Darlington refurbishment project achieves milestone

The Darlington refurbishment project is scheduled for completion by the end of 2026

September 4, 2020  by CM Staff

Example of a nuclear fuel bundle at OPG’s Darlington Nuclear Generating Station (Ontario Power Generation Inc.)

TORONTO — Ontario Power Generation (OPG) has reached a milestone with work now underway on refurbishing Unit 3 of the Darlington Nuclear Generating Station following the unit’s safe shutdown on July 30.

“This enormous clean energy project will play a significant role in Ontario’s fight against climate change by providing 30-plus years of clean, low-cost and reliable power for Ontarians,” said Ken Hartwick, OPG’s President and CEO, in a prepared statement. “The start of Unit 3 refurbishment reflects the Province’s confidence in our project team’s ability to build on its success to date and complete this next phase of the project.”

“Refurbishing Darlington’s Unit 3 is crucial for securing Ontario’s long-term energy future,” said Greg Rickford, Minister of Energy, Northern Development and Mines. “This announcement brings us one step closer to extending the life of Darlington, which will enable Ontarians to benefit from reliable, emission-free and low-cost energy for decades to come.”

In 2016, OPG and its project partners began execution of the Darlington refurbishment project. Following more than three years of work on Darlington Unit 2, the project team completed the unit’s refurbishment and returned it to commercial service in June 2020, amid the unexpected challenges of the COVID-19 pandemic.


In response to COVID-19, OPG postponed the commencement of the Unit 3 refurbishment from its scheduled start in May 2020. Now that the Unit 3 reactor has been safely shut down and disconnected from Ontario’s electricity grid, workers will use remote-controlled tooling to remove 6,240 fuel bundles from the unit over the next three months and place them in water-filled fuel bays for up to 10 years of safe storage.

Since the start of the project, OPG workers have completed more than 24 million hours of work safely and with quality. The team has also completed more than 750,000 hours of training in the world-class Mock-up and Training Facility located at OPG’s Darlington Energy Complex. As well, the team has incorporated more than 4,000 lessons learned from Unit 2 refurbishment into the plans and preparations for Unit 3 and subsequent unit refurbishments, increasing efficiencies across the project.

Refurbishing the Darlington Nuclear Generating Station, one of Canada’s largest clean energy infrastructure projects, is critical in the province’s efforts to combat climate change. An independent report prepared by Intrinsik Environmental Sciences noted the continued operation of the refurbished station to 2055 will equal removing two million cars per year from Ontario’s roads by avoiding significant greenhouse gas emissions.

The Darlington refurbishment project is scheduled for completion by the end of 2026.