In April, three of the four finalists in GBN’s SMR competition—Rolls-Royce SMR, GE Hitachi (GEH), and Westinghouse Electric—submitted their final tenders, following invitations issued in February. GEH, part of GE Vernova, proposed its BWRX-300 boiling water reactor. Holtec offered its SMR-300, a 300 MWe pressurized water reactor (PWR). Rolls-Royce presented a 470 MWe PWR, and Westinghouse submitted the AP300, a 300 MWe/900 MWt PWR. GBN aims to select up to three technologies for deployment.
The Prior Information Notice on the Gov.UK “Find a Tender” site outlines that the OEs will serve as expert advisors to the Intelligent Customer and Client, providing technical expertise, oversight, and assurance on design, budget, risk, and contract compliance. The notice stated: “In particular, the OE will act as a ‘client friend’ to the Intelligent Customer and Intelligent Client and provide competent resource to undertake specification, oversight, audit, review and advice for decisions relating to design, scope, budget, risk, delivery and contract compliance.”
The contract, valued at up to £600 million ($799 million) for two potential awards of £300 million each, will depend on various factors. Tender submissions are due by September 19, with a decision expected on March 12, 2026. The contract term is projected at 14 years, though GBN will confirm the duration after selecting the SMR Technology Partner. OEs must provide 36 technical capabilities, including safety case analysis, civil engineering, and radiological protection, and six program capabilities, such as risk and cost management.
The procurement process involves two stages. Initially, tenderers must complete a Procurement Specific Questionnaire (PSQ) to meet participation conditions. Successful candidates will then submit detailed proposals evaluated on technical, commercial, and social value criteria. GBN noted: “GBN reserves the right to refine its award criteria during the procurement process.”
This initiative supports the UK’s efforts to expand clean energy through advanced nuclear technology. The selected OEs will play a critical role in ensuring the successful delivery of the SMR projects, contributing to sustainable energy development and operational excellence.
