Major project · Ontario
Darlington New Nuclear Project
Also called DNNP
Proponent: Ontario Power Generation.
Major Projects Office pageWhy it is listed
Federal funding. Federal funding stated: equity
the Canada Growth Fund’s commitment of up to $2 billion in equity financing for the Darlington New Nuclear Project.Source, read Oct. 3, 2026
Proponentthe Commission’s decision to issue a power reactor construction licence to Ontario Power Generation Inc. (OPG)Source, read Oct. 3, 2026
Status
The MPO continues to monitor project progress and engage with Indigenous groups, partners, and proponents to support the timely delivery of this project.Source, read Oct. 3, 2026
Roadmap
- Done
CNSC licence to construct first SMRDone
April 4, 2025
On April 4, 2025, the Canadian Nuclear Safety Commission (CNSC) granted Ontario Power Generation (OPG) a license to construct the first SMR for the Darlington New Nuclear Project.
Source, read Oct. 3, 2026Referred to Major Projects OfficeDone
5 months after the previous step.
Sept. 11, 2025
On September 11, 2025, the project was referred to the Major Projects Office (MPO).
Source, read Oct. 3, 2026Canada Growth Fund equity commitment announcedDone
About 1 month after the previous step.
Oct. 2025
In October 2025, the Government of Canada announced that the Canada Growth Fund had committed up to $2 billion in equity financing for the Darlington New Nuclear Project.
Source, read Oct. 3, 2026Indigenous loan guarantee announcedDone
About 9 months after the previous step.
June 23, 2026
On June 23, 2026, the Government of Canada and the Province of Ontario announced a loan guarantee transaction that will allow seven First Nations in Ontario (the Williams Treaties First Nations) to eventually own a meaningful minority interest in DNNP
Source, read Oct. 3, 2026
Funding
- $2 billion Equity
No over-budget estimate. These are the commitments the official pages state. None is an original budget set beside a later cost for the same work.
Equitythe Canada Growth Fund’s commitment of up to $2 billion in equity financing for the Darlington New Nuclear Project.Source, read Oct. 3, 2026
Loan guaranteeOn June 23, 2026, the Government of Canada and the Province of Ontario announced a loan guarantee transaction that will allow seven First Nations in Ontario (the Williams Treaties First Nations) to eventually own a meaningful minority interest in DNNPSource, read Oct. 3, 2026
Laws named in the sources
No law is named on the official pages read for this project.
Bills
No bill in the database names this project, or an act it is listed or considered under.
The framework law for the major projects list is below. It does not name this project.
Sources
- Major Projects Office page for this project
- Government announces largest Indigenous loan guarantee in Canadian history to support Darlington New Nuclear Project - Canada.caRead Oct. 3, 2026
- Commission authorizes Ontario Power Generation Inc. to construct 1 BWRX-300 reactor at the Darlington New Nuclear Project site - Canada.caRead Oct. 3, 2026
- Prime Minister Carney announces first projects to be reviewed by the new Major Projects Office | Prime Minister of CanadaRead Oct. 3, 2026
- Major Projects OfficeThe office list this project is drawn from.