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Ontario Darlington BWRX-300 — Mark Carney Federal Government Backing

Canada
Under Construction
Developer
Ontario Power Generation / GE Vernova Hitachi / Federal Government
Capacity
300 MWe
Last updated
5/16/2026

Project overview

Reactor type
BWR
Announced
5/8/2025
Projected operational
12/31/2029

Notes

Both Prime Minister Mark Carney's federal government and Ontario Premier Doug Ford's provincial government have financially backed the Darlington BWRX-300 SMRs. Carney's government confirmed continued federal support following the April 2025 election, maintaining the $2 billion federal commitment. Ontario Energy Minister Stephen Lecce stated that communities across the province have been "petitioning us for a small modular reactor." The project is described as a scaled-down version of an existing nuclear reactor model (GE's tenth generation BWR design). Narwhal reporting confirms nuclear concrete is now being poured.

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