Small Modular Reactors: technology selection process

In July 2023, GBN issuedwe issued a Contract Notice setting out an intention to enter into a two2 Stage contract for design, development and construction contract with those successful bidders.  

Procurement Progressprogress To-Date to-date 

1. 1. In July 2023, interested parties were required to respond to a selection questionnaire. This concluded in August 2023. 

2. 2. In October 2023, GBNwe down-selected six6 technologies, who would be eligible to bid into the next phase of the procurement.

3. 3. In March 2024, these six6 vendors were invited to submit initial tenders. GBNWe received five5 bids by the July 2024 submission deadline.

4. 4. In September 2024, GBNwe concluded the initial tender phase of the technology selection process. The down-selected companies are:

• GE-Hitachi Nuclear Energy International LLC 

• Holtec Britain Ltd 

• Rolls Royce SMR Ltd 

• Westinghouse Electric Company UK Ltd 

5.In5. In October 2024, GBNwe issued an Invitation to Negotiate to the four4 companies.

6.In6. In February 2025, GBNwe issued an Invitation to Submit Final Tenders. Once final tenders are received, GBNwe will evaluate these, with final decisions on which technologies to select to be taken in the spring.

7. In June 2025, Rolls-Royce SMR Ltd was selected as preferred bidder.

Contact details 

If you have any questions about  SMRs  or  GBN, GBE-N, email  enquiries@gbnuclear.gov.ukenquiries@greatbritishnuclear.uk.