Ontario Power Generation
🇨🇦 CA · Active
Also known as OPG
Ontario Power Generation (OPG) is a Crown corporation wholly owned by the government of Ontario, Canada, created in 1999 as one of the successor companies to Ontario Hydro. It produces roughly half of Ontario's electricity from nuclear, hydroelectric and other plants. It operates the Pickering and Darlington nuclear stations and owns the Bruce station, which Bruce Power operates under a long-term lease. In December 2021 OPG partnered with GE Hitachi to deploy a small modular reactor at its Darlington new nuclear site, and on 4 April 2025 the Canadian Nuclear Safety Commission issued it a licence to construct one BWRX-300 there. The licence does not authorise operation, which needs a separate Commission decision.
- Sector
- Fission
- Technology
- Pressurised heavy-water reactor
- Role
- Utility, Operator
It is the operator of record for Darlington New Nuclear Project Unit 1 (under construction).
1 regulatory milestone is tracked here, anchored to a docket reference in the regulator's own record.
Terms
- Pressurised heavy-water reactor
- Heavy water (deuterium oxide) kept under pressure as both coolant and moderator, which absorbs far fewer neutrons than ordinary water and so lets the reactor run on natural, unenriched uranium. That is the CANDU design's defining trade: heavy water is expensive to produce, but the fuel needs no enrichment plant. Fuel is natural or slightly enriched uranium oxide, usually in horizontal pressure tubes, refuelled online without shutting the reactor down.
Devices
Licensing
- 2025-04-04achievedConstruction permit issuedCNSC licence to construct one BWRX-300 at the Darlington New Nuclear Project · Canadian Nuclear Safety CommissionCNSC licence PRCL 32.00/2035