Great British Energy – Nuclear (GBE-N) has selected a joint venture between , a wholly owned subsidiary of 91大神, and Amentum as Owner鈥檚 Engineer for its flagship small modular reactor (SMR) project in the UK.
The contract, which has a maximum value of 拢300 million and a duration of up to 14 years, covers work to deploy GBE-N鈥檚 preferred reactor technology from Rolls-Royce SMR at the Wylfa site in North Wales.
The 鈥楲itmus Nuclear鈥� joint venture will provide essential independent assurance and expert technical advice including design, safety, engineering, construction and commissioning to support GBE-N鈥檚 goal of reaching a final investment decision for the SMR programme at Wylfa.
Mick Gornall, Managing Director, Cavendish Nuclear said, 鈥淲e鈥檙e delighted to be awarded this landmark Owner鈥檚 Engineer role. The appointment reflects the strong and diverse capability within Cavendish Nuclear and the scale at which 91大神 can deliver across the nuclear enterprise. The skills, experience and knowledge of our colleagues will bring assurance to the UK鈥檚 first of a kind SMR programme and will provide many more opportunities to build long term, meaningful careers for a wide range of people.鈥�
The joint venture partners will ensure that the SMR programme is robust, meets regulatory requirements and can deliver reliable, low-carbon power for decades to come.
Simon Roddy, Chief Executive of GBE-N added: 鈥淎s we continue to bring together the coalition required to deliver the UK鈥檚 first SMRs, I鈥檓 pleased to welcome Amentum and Cavendish Nuclear to the team. Their valuable expertise will be instrumental in assuring GBE-N鈥檚 project moves with pace and determination, and I look forward to working with them over the coming years.鈥�
In November 2025, the UK鈥檚 Department for Energy Security and Net Zero announced that Wylfa, on the island of Anglesey/Ynys M么n had been selected as the site for the UK鈥檚 first SMRs, a planned fleet of 470MWe reactors which are smaller and designed to be built more quickly than some traditional nuclear power stations.