Basemat is set at Darlington for the first BWRX-300 in the Western Hemisphere

GE Vernova Hitachi/BWRX-300

The concrete basemat was poured at Ontario Power Generation's Darlington New Nuclear Project, marking the start of actual reactor structure construction for the first BWRX-300 to be built in the Western Hemisphere. This followed official approval to begin construction in May 2025.

• Basemat set marks transition from site preparation to structural construction.
• First BWRX-300 is expected to be operational by end of 2029.
• Four units planned at Darlington will deliver 1.2 GW total (enough for over a million homes).
• Key components including the reactor pressure vessel are in manufacturing at Canadian facilities.