Darlington New Nuclear Project
Ontario Power Generation · Clarington, ON
Overview
Four GE Vernova Hitachi BWRX-300 small modular reactors on the Darlington site, the first grid-scale SMR construction licence issued in Canada. The first unit is intended to be the first commercial SMR operating in North America, which makes its schedule and cost the reference case every other Canadian SMR programme is measured against.
- Owner
- Ontario Power Generation
- Province
- Ontario
- Location
- Clarington, ON
- Category
- Nuclear
- Phase
- Construction
- Estimated cost
- $20.9 billion
- Expected completion
- 2030
Cost figure covers four BWRX-300 units, as stated Jan 15, 2026.
Latest update
Reactor building foundation hold point released by the regulator.
The CNSC verified that commitments for the reactor building foundation installation hold point were met.
Mar 30, 2026
Project timeline
- Mar 30, 2026
Reactor building foundation hold point released by the regulator.
The CNSC verified that commitments for the reactor building foundation installation hold point were met.
Source ↗
Recent news
- Ontario’s $149/MWh Darlington SMR Estimate May Be Much, Much HigherEnergi.Media · Oct 5, 2026
Sources
- OPG — Darlington SMROfficial
- CNSC — Darlington New Nuclear ProjectRegulatory
Also reported as: Darlington SMR · DNNP · BWRX-300 Darlington · OPG SMR Project · Darlington Small Modular Reactor
Tracked since Sep 21, 2026
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