Webinar: Darlington New Nuclear Project: Construction of reactor and application for power reactor operation licence

Join us on December 4 for a webinar on the Darlington New Nuclear Project

In April 2025, the Commission issued Ontario Power Generation (OPG) a licence to construct 1 BWRX‑300 reactor at the Darlington New Nuclear Project (DNNP) site.

The licence includes site-specific licence conditions and regulatory hold points established by the Commission, which enable effective regulatory oversight of the licensed activities. The first regulatory hold point, which focused on the installation of the reactor building foundation, was removed on March 30, 2026.

In March 2026, OPG applied for a 20-year licence to operate 1 BWRX-300 reactor and associated supporting infrastructure. The application is subject to a decision by the Commission following a public hearing, which will be announced at a later date. CNSC staff are currently conducting a regulatory review of OPG’s application for a licence to operate. OPG is continuing to submit supporting documentation for this application in multiple packages.

This interactive live session will provide the following with respect to the DNNP:

• an overview of the project
• an update on the status of regulatory hold points for the licence to construct
• an overview of OPG’s application strategy for its licence to operate
• information on the CNSC’s approach to Indigenous engagement and consultation
• information on upcoming opportunities to participate and next steps in the licensing process

Webinar details

English webinar

Date: December 4, 2026
Time: 10 am to 11:30 am EST
Registration link: Webinar: Darlington New Nuclear Project: Construction of reactor and application for power reactor operation licence

French webinar

Date: December 4, 2026
Time: 2 pm to 3:30 pm EST
Registration link: Webinaire : Projet de nouvelle centrale nucléaire de Darlington : Construction d’un réacteur et demande de permis d’exploitation d’un réacteur de puissance

Ask a question

We welcome questions at any time. These may be submitted to info@cnsc-ccsn.gc.ca.

Background

The Darlington New Nuclear Project (DNNP) is a proposed nuclear facility at the existing Darlington site in the Municipality of Clarington. The Darlington site lies within the traditional lands and waters of the Michi Saagiig Anishinaabeg through the Gunshot Treaty (1787–88), the Williams Treaties (1923), and the Williams Treaties Settlement Agreement (2018).

The site is owned by Ontario Power Generation (OPG). OPG announced its selection of the GE Vernova Hitachi BWRX-300 reactor for deployment at the DNNP site in December 2021. The BWRX-300 is a 300 MWe water-cooled, natural circulation small modular reactor. The licence to construct includes 3 regulatory hold points established by the Commission. The commitments OPG has made in relation to each hold point must be completed and verified by CNSC staff prior to obtaining the approval of the Commission, or a person authorized by the Commission, to remove the regulatory hold points and to continue with construction activities.

Related links

• Previous webinars on the DNNP:
  • July 8, 2024: Update on OPG’s application for a licence to construct for the Darlington New Nuclear Project
    • Watch a recording of the webinar (video)
  • October 31, 2023: DNNP – Regulatory review and public hearing update
    • Watch a recording of the webinar (video)
  • June 22, 2023: DNNP – Licensing review
    • Watch a recording of the webinar (video)
  • November 15, 2022: DNNP – Licensing review
    • Watch a recording of the webinar (video)
  • February 2, 2022: The CNSC’s role in the regulation of small modular reactors
    • Watch a recording of the webinar (video)
• Darlington New Nuclear Project
• Darlington New Nuclear (source: OPG)
• Commission hearing information – Darlington New Nuclear Project