Canada approves its first small modular reactor

By Francisco "A.J." Camacho | 04/08/2025 07:00 AM EDT

The license paves the way for Ontario to build a commercial GE Hitachi reactor as U.S. utilities eye the same technology.

Rows of chambers hold intermediate-level radioactive waste at the Bruce Power nuclear complex in Ontario.

Rows of chambers hold intermediate-level radioactive waste at the Bruce Power nuclear complex near Kincardine, Ontario, in 2013. Ontario Power Generation plans to build the country's first commercial small nuclear reactor. John Flesher/AP

Ontario Power Generation is on track to build the first commercial small modular nuclear reactor in North America, marking a watershed moment for the advanced nuclear industry.

The Canadian Nuclear Safety Commission granted the utility a license on Friday to begin construction immediately on a single reactor at its Darlington New Nuclear Project site in Bowmanville, Ontario. The Ontario government still needs to green-light the project before construction can begin.

OPG will build GE Hitachi’s BWRX-300, a small modular version of a boiling water reactor. It plans to eventually build four of the reactors at the Darlington site.

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The license “is a significant milestone for the project and nuclear industry,” GE Hitachi said in a statement. “We now await the go-ahead from the Ontario government to proceed.”

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