AtkinsRalis Group Inc. confirmed that its formal submission to the Canadian Nuclear Safety Commission (CNSC) is for a reactor with a net electrical output of 925 megawatts (MW) and not the information posted on the CNSC website. The 925MW net licensing is intentional, prioritizing replicability, regulatory confidence, and execution discipline. The Company has engaged the CNSC to update its website.
The CANDU Monark design submitted to the CNSC is aligned with the requirements and deployment objectives of the domestic nuclear utility clients, and it reflects a deliberate focus on proven performance, regulatory familiarity, and execution certainty. The CANDU Monark is engineered with the capability to be potentially uprated to approximately 1,000 MW, subject to owner decisions, site-specific conditions, and regulatory approvals. This uprate potential is enabled through well-understood design margins, turbine-generator selection, and balance-of-plant optimization, rather than unproven core design changes.
The Monark design has not been redesigned downward. The decision to license at 925 MW net is intentional and reflects a commitment to avoid first-of-a-kind (FOAK) risk, replication of an operating, regulator-trusted design and cost, schedule, and execution discipline for owners and ratepayers. As with all nuclear projects, final operating parameters are determined through detailed design development and regulatory and client engagement.
AtkinsRalis remains confident that the CANDU Monark offers a competitive, scalable, and derisked largereactor solution, particularly for jurisdictions seeking fleet deployment, domestic supply chain benefits, and proven CANDU operational experience.
