Friday, February 20, 2026
Bruce Power announced it has successfully completed the construction phase of its Unit 3 Major Component Replacement (MCR) project.
When it returns to service with all-new components, Unit 3 will provide enough clean energy to power a city the size of Brampton for the next 35 years and beyond at a time when the Independent Electricity System Operator (IESO) estimates electricity demand could grow by 75 per cent.
“Completing the construction phase of Unit 3’s Major Component Replacement is a major step forward for Ontario’s clean energy future,” said Eric Chassard, Bruce Power’s president and CEO. “Thanks to the safe, high quality and disciplined work of our people, skilled trades and partners — and the innovative tooling that’s delivering step improvements in nuclear refurbishment performance — we’re now focused on returning this renewed unit to service on budget and ahead of schedule.”
Bruce Power Operations staff will begin refueling the unit with 5,760 fuel bundles later this month, while other lead-out activities and regulatory inspections will be completed to return it to Ontario’s electricity grid.
The Bruce Power Refurbishment is No. 5 on ReNew Canada’s 2026 Top100 Projects report.
This is the second of six units that Bruce Power and its partners will refurbish between 2020 and 2033, a privately funded investment into Units 3-8 that will extend the life of the site for 40 years or more. The Unit 4 MCR outage began in February of 2025 and the Unit 5 MCR is scheduled to begin in November. The IESO will also study the possibility of a second refurbishment of Units 1 and 2 in the future.
“Delivering strong performance on a project of this scale is the result of relentless focus on safety, disciplined execution, and the ability to innovate,” said Laurent Seigle, EVP, Projects. “By applying lessons learned, investing in new tooling, and working as one team with our partners and skilled trades, we continue to raise the bar with each Major Component Replacement, improving schedule certainty, quality, and efficiency while setting the foundation for the units that follow.”
Unit 3 was removed from service March 1, 2023, and Bruce Power and its construction partners including Shoreline Power Group (SPG), Steam Generator Replacement Team (SGRT), BWXT, ES Fox, ATS, Framatome, Kinectrics, Mammoet and many suppliers have worked together safely to successfully deliver this complex Project.
The construction phase of the Unit 3 MCR, completed with execution partner SPG, a joint venture between Aecon, AtkinsRéalis and United Engineers and Constructors, and a multitude of talented and dedicated tradespeople from the Ontario Building Trades, included the removal and replacement of 480 fuel channels and 960 end fittings, as well as eight hulking steam generators.
Steam generator work was completed by SGRT, a 50/50 joint venture between Aecon and SGT (a partnership between Framatome Canada Ltd. and United Canadian Operations Ltd.)
“The successful completion of the Unit 3 construction phase is a clear demonstration of Aecon’s commitment to safety-first execution, continuous improvement, and innovation in nuclear refurbishment,” said Steven Gilroy, vice president, Bruce Power Projects, Aecon Nuclear. “By continually advancing our tooling, processes, and project delivery methods, our teams and partners continue to raise the bar.”
Bruce Power’s Life-Extension Program and MCR Project will extend the operational life of each reactor by 30 to 35 years and, as a result, help mitigate the predicted increase in greenhouse gas emissions intensity of the electricity grid. Bruce Power’s MCR and Asset Management investments are closely co-ordinated with Project 2030, a program that leverages innovation and new efficient technology to increase site capacity, targeting upwards of 7,000 megawatts net peak output in the early-2030s, once all units have completed their MCRs.
“In Huron-Bruce, skilled trades are supported on so many different levels. The progress on Unit 3 is a reminder that it’s not just an energy project, it’s a lasting investment in people, communities, and the economy,” said Lisa Thompson, MPP for Huron-Bruce. “The Clean Energy Frontier Region sees first-hand the benefits of nuclear refurbishment through well-paying skilled jobs, local business opportunities, and long-term confidence that Ontario will have the reliable electricity it needs as demand grows.”
Featured image: (Bruce Power)
