Source: https://tendernation.io/opportunities/01a13be4-b051-7090-9deb-8691b750848e/design-for-longevity-electrolyser-prototype-design awarded GB open procedure Suitable for SMEs # Design for Longevity- Electrolyser Prototype Design [UK Fusion Energy Ltd](https://tendernation.io/buyers/uk-fusion-energy-ltd) Estimated value £125,000 Published 15 Sept 2026 Deadline Closed 14 Aug 2026 ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Below-threshold contract Buyers cannot shortlist bidders on suitability before tenders are in, so everyone gets to submit a bid (except some larger works contracts). [Procurement Act 2023, section 85](https://www.legislation.gov.uk/ukpga/2023/54/section/85) - Open procedure Anyone can submit a full tender; there is no shortlisting stage. [More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses) ## About this tender The STEP Fuel Cycle is the subsystem responsible for recovering, purifying and supplying tritium to the STEP fusion reactor. Tritium is present in a variety of forms, phases and compositions, including tritiated water. Vapour-phase electrolysis techniques such as solid-oxide electrolysis have been identified as a suitable technique for processing small quantities of tritiated water. The scope is to deliver the conceptual design of an electrolyser system (electrochemical cell or stack). This includes, but is not limited to, components of the electrolyser: electrolytes, electrodes, interconnects, separators, electrical connections, vessels, structural components, seals, gaskets, heating elements, inlet/outlet pipes, ports, flanges and instrumentation. The scope does not include conceptual design of ‘Balance of Plant’ equipment such as power supplies, pumps, purification stages, boilers, compressors or dehumidifiers. However, the impact on balance of plant equipment must be considered in design decisions for the electrolyser itself. The scope is structured into three sequential phases with interim milestones. These phases will progressively develop technical understanding, validate assumptions, and converge on agreed technical content. ## CPV classification Engineering services Research and experimental development services Experimental development services Source Find a Tender (UK) · Notice ocds-h6vhtk-06cdb2-2026-09-15T11:35:46+01:00 [View official notice](https://www.find-tender.service.gov.uk/Notice/ocds-h6vhtk-06cdb2-2026-09-15T11:35:46+01:00) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. 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