GE Vernova-Hitachi Reactor Wins Backing for 14-Unit UK Fleet in Largest SMR Proposal Yet
Polish-backed SGE has submitted plans for 4.2 GW of BWRX-300 capacity across three British sites, putting American and Japanese reactor technology at the centre of a new competition for UK nuclear contracts.
SGE, a Warsaw-based firm founded by Poland's richest man, submitted plans on Wednesday (2026-07-01) to build 14 GE Vernova Hitachi BWRX-300 small modular reactors across three British sites under the UK's advanced nuclear framework — the largest single SMR commitment proposed in Britain to date.5
The 4.2-gigawatt fleet would meet roughly 11% of UK electricity demand and supply around eight million homes for at least 60 years, SGE said.5
The BWRX-300 is a tenth-generation boiling water reactor, developed through the US-Japanese GE Vernova and Hitachi partnership, rated at 300 megawatts per unit. That capacity sits at the upper end of the small modular reactor class — which the EIA defines as designs producing 300 MW or less — compared with 550 MW to 1,500 MW for conventional large-scale plants. The smaller footprint is designed to make siting easier and construction faster than light-water reactors that took decades and billions in cost overruns in Western markets.5,1
The application puts the GE Vernova-Hitachi technology in direct competition with Rolls-Royce SMR, which the UK government selected for a £2.5 billion programme targeting up to three reactors. At 14 units, the SGE proposal carries nearly six times more generating capacity — though it faces the same financing and regulatory hurdles that have blocked every large nuclear project in Britain since Hinkley Point C first secured approval.5
No small modular reactor has yet entered commercial operation anywhere in the world. The UK's advanced nuclear framework is meant to compress the planning timeline, but the distance between a submission and a final investment decision remains wide. Several European utility-backed projects have cleared that gap on paper without reaching a construction contract. Financing is the binding constraint, not the engineering.
Goldman Sachs captured the broader market rationale in a note published in May (2026-05-19), when it added SMR deployments to its uranium supply and demand model for the first time. Analyst Brian Lee projected cumulative SMR capacity of nearly 46 gigawatts by 2045, lifting Goldman's nuclear generation forecast for that year by about 6% and adding an estimated 62 million pounds of uranium demand — a 17% increase on the bank's prior long-term demand estimate.3,4
Uranium spot prices were holding in the mid-to-high $80s per pound with term pricing near $90 per pound at the time of that note. The uranium ETF URA fell 1.3% on Wednesday (2026-07-01) to $43.18, a move that reflected broader market moves rather than anything specific to SMR fundamentals.4
Lee also projected a cumulative uranium supply deficit of 2.3 billion pounds between 2025 and 2045, as reactor demand builds faster than mines can be expanded.3 The US currently operates about 98 gigawatts of nuclear capacity, and the federal government has pushed through accelerated licence renewals — the NRC in April (2026-04-16) extended Robinson Unit 2 in South Carolina through 2050 under new timelines, adding 759 MW of operational life.1,2
For GE Vernova and Hitachi, SGE's UK submission marks the BWRX-300's most visible European commercial test. The US company and its Japanese partner are competing against European and domestic designs for procurement decisions that governments from Britain to Poland to Canada are expected to make over the next two to three years. Whether SGE's application advances to a bankable contract will be watched closely: the first BWRX-300 project to secure financing in Europe is likely to set the reference point for the wave of SMR orders that follows.5