ProjectElectricityGoes domestic

Darlington SMR (first unit)

Ontario Power Generation's first small modular reactor at the Darlington nuclear site in Bowmanville, Ontario, approved for construction by Ontario in May 2025 and among the first five projects referred to the federal Major Projects Office on 11 September 2025. The first unit is under construction.

Status

Under construction

Direction

Domestic: Serves Canada itself.

Where

Ontario

Owners

• Ontario Power Generation as of 1 September 2026

  Major Projects Office (Privy Council Office), “Projects referred to the MPO” (external site), 1 September 2026. source record

Events

• 11 September 2025First five projects referred to the Major Projects Office (over C$60B), including LNG Canada Phase 2DocumentRegulationCanada3 sources
• 8 May 2025Ontario approves construction of the first small modular reactor at Darlington (four-unit project, C$20.9 billion)ActionPermitOntario1 source