US-based nuclear energy firm Holtec has chosen Doncaster’s GatewayEast as the site for its new UK manufacturing facility, following a national search across 13 regions. The location, adjacent to Doncaster-Sheffield Airport, secured the investment over two other shortlisted sites in South Yorkshire.
The facility will produce two small modular reactor (SMR) units annually, with half of its output intended for export. Holtec’s SMRs utilise pressurised water reactor (PWR) technology, the same type deployed at Hinkley Point C, which supports supply chain standardisation and workforce development.
The project is expected to generate significant economic value. Independent analysis by Bradshaw Advisory estimates £1.8bn in gross value added over 20 years, £1.5bn from the factory itself, and £300m from engineering services linked to SMR deployment. It is also forecast to support 3,600 construction roles, over 16,000 supply chain jobs, and 3,000 unionised engineering positions.
The site selection aligns with Holtec’s strategy to localise production and increase UK content in its energy and defence programmes, targeting 70% domestic sourcing. The company has signed MOUs with regional and national partners, including South Yorkshire Combined Authority, Sheffield Forgemasters, and major manufacturing research centres. Holtec is also in ongoing discussions with major UK trade unions to align with industrial workforce priorities.
This development follows the UK government’s £30m commitment to reopening Doncaster-Sheffield Airport, further positioning GatewayEast as a strategic hub for industrial investment and global export. Holtec is currently finalising the business plan ahead of its final investment decision.
