{"docs":"https://nuclearnewsnetwork.com/tracker","unit":{"slug":"darlington-bwrx-300-1","name":"Darlington New Nuclear — BWRX-300 Unit 1","plant":"Darlington","unit":1,"country":"CA","region":"north-america","reactor_type":"BWR","design":"BWRX-300","capacity_mw_net":300,"is_smr":true,"vendor":"GE Hitachi (GE Vernova)","owner_operator":"Ontario Power Generation","status":"under_construction","construction_start":2025,"original_cod_target":2030,"current_cod_estimate":2030,"milestones":[{"date":"2025-04-04","event":"CNSC licence to construct granted; OPG/Ontario approved ~C$20.9bn for four units","source":"https://world-nuclear-news.org/"},{"date":"2026-06-24","event":"OPG applied to CNSC for 20-year operating licence — would be first operating SMR in a G7 country","source":"https://www.world-nuclear-news.org/"},{"date":"2026-07-01","event":"Unit 1 reactor building shaft excavation past 80%; reactor pressure vessel in manufacturing","source":"https://www.renewcanada.net/the-projects/darlington-new-nuclear-project/"}],"sources":["https://www.gevernova.com/nuclear/carbon-free-power/bwrx-300-small-modular-reactor/bwrx-300-darlington-ontario","https://www.opg.com/"],"last_verified":"2026-07-10","verified":true,"confidence":"high","notes":"First grid-scale SMR construction in the West; the FOAK cost/schedule benchmark for the entire BWRX-300 order book (Poland, TVA, SK).","tags":["canada","smr","bwrx-300","opg","western-foak"],"updated_at":"2026-07-10","slippage_years":0}}