Amarinth to Replace Obsolete Submersible Pumps at EDF’s Sizewell B Nuclear Power Station

15.01.2026
Amarinth has been commissioned to supply bespoke electro-submersible pumps to EDF Energy for installation at the Sizewell B nuclear power station in Suffolk, UK. The new pumps will perform a range of duties including the removal of effluent from drainage tanks.
Amarinth to Replace Obsolete Submersible Pumps at EDF’s Sizewell B Nuclear Power Station

Amarinth submersible pump undergoing test for EDF (Image source: Amarinth Ltd.)

They replace existing units that had reached the end of their operational life but for which direct replacements were no longer available due to the original manufacturer ceasing operations.

EDF Energy sought a modern replacement solution rather than refurbishment and turned to Amarinth due to its proven track record in supplying like-for-like replacements for obsolete equipment and its previous successful collaborations with EDF.

Engineers from Amarinth visited Sizewell B to assess the site’s hydraulic performance requirements, space constraints, pipework and electrical connections. Using this information, Amarinth proposed a bespoke submersible pump design that delivers the required hydraulic performance while minimising modifications to existing infrastructure.

EDF’s installation schedules require equipment to be supplied to site within defined windows. Amarinth’s base in Suffolk, close to Sizewell, enables the company to offer a rapid response and flexibility in delivery. Each pump will undergo rigorous testing at Amarinth’s test facility, including special adaptations to replicate site conditions and verify performance against EDF’s specifications.

Amarinth is an existing verified Fit for Nuclear (F4N) supplier, demonstrating compliance with the high operational and business excellence standards demanded by the UK nuclear sector and providing confidence to operators such as EDF that Amarinth’s processes, quality systems, and continuous improvement programmes align with the stringent requirements of the nuclear supply chain.

Oliver Brigginshaw, Managing Director of Amarinth, commented: "We are delighted to have received another order from EDF. Our relationship with EDF across its sites continues to strengthen, and this project highlights Amarinth’s ability to provide technically advanced, fully compliant pump solutions for the UK’s nuclear facilities. Being located close to Sizewell enables us to offer rapid response and on-site support, which is invaluable when working to the demanding operational schedules of a nuclear power station. We look forward to continuing our support for EDF as the Sizewell C development progresses."

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