--- title: "ThermoChimie Phase 4 Framework" ocid: "ocds-h6vhtk-05230e" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05230e" markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-05230e.md" json_url: "https://d3tenders.com/contract/ocds-h6vhtk-05230e.json" source: "Find A Tender Service" current_stage: "Award" buyer: "NUCLEAR WASTE SERVICES LIMITED" published: "2026-05-21" --- # ThermoChimie Phase 4 Framework Buyer: NUCLEAR WASTE SERVICES LIMITED Current stage: Award OCID: ocds-h6vhtk-05230e [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05230e) [Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-05230e.json) ## Summary Nuclear Waste Services Limited, based in Calderbridge, Seascale, United Kingdom, is the contracting authority for the ThermoChimie Phase 4 Framework procurement process, aimed at developing a thermodynamic database vital for the disposal of radioactive waste. The process, which has moved through various stages including planning, tender, and now to award, involves multiple phases, with key dates highlighting a start in February 2026 and completion by 2030. The procurement method used is open, with the framework agreement featuring mini competitions under the framework. Contracts have been awarded across four lots, each set to extend over approximately four years and subject to renewal options. The main industry category is research and development services, and the procurement is valued at £2,500,000, distributed across services related to database and consultancy services. This extensive framework offers significant business growth opportunities, particularly for large research and consulting firms skilled in thermodynamic data generation and analysis. It's well-suited for organisations capable of providing experimental studies, database management, and collaborative work within a consortium. By participating, businesses can establish a foothold in the nuclear research sector, leveraging the repeat engagements possible under framework agreements. The open procurement process used ensures broad competition, permitting large and experienced international organisations like Galson Sciences Limited, Amphos 21 Consulting S.L., and others to emerge as key suppliers, reinforcing their presence in the European R&D landscape in nuclear technology. ## Notice The ThermoChimie project (Thermo-Chimie (version applicative 4.4.0)) is a thermodynamic database development project, co-funded by Nuclear Waste Services, NIRAS-ONDRAF, and Andra. A robust, traceable, exhaustive, and dependable thermodynamic database is essential for underpinning a future Environmental Safety Case for the surface, near-surface or deep geological disposal of radioactive waste, as well as to perform a range of sensitivity and scoping calculations in support of ongoing research activities. Phase 4 of the ThermoChimie project is planned to start in February 2026. The ThermoChimie Phase 4 Framework has the overall objective of providing both specialist and non-technical support resource to the consortium, in the form of a range of desk-based and experimental data generation/selection activities. Outlined activities are in support of the four key project success factors: (i) database traceability, (ii) consistency, (iii) east of use, and (iv) exhaustivity. ### Lot Information Lot 1 Secretariat (One Supplier - Direct Award) Options: Two optional yearly extensions following the original three year durations. These options are at NWS discretion. Renewal: +1 +1 Lot 2 Lot 2 - Database and Website Management / Maintenance (One Supplier - Direct Award) Options: Two optional yearly extensions following the original three year durations. These options are at NWS discretion. Renewal: +1 +1 Lot 3 Lot 3 - Desk Studies: Data Generation, Selection, Assessment and Verification (Multiple Suppliers, Mini Competition) Options: Two optional yearly extensions following the original three year durations. These options are at NWS discretion. Renewal: +1 +1 Lot 4 Lot 4 - Experimental Studies: Data Generation, Model Verification (Multiple Suppliers, Mini Competition) Options: Two optional yearly extensions following the original three year durations. These options are at NWS discretion. Renewal: +1 +1 ### Planning Information Please visit https://atamis-2464.my.site.com/s/Welcome for information on this procurement search for reference C26852. More information is available via the documentation on Atamis. ## Key Details | Field | Value | | --- | --- | | Publication source | Find A Tender Service | | Latest notice | https://www.find-tender.service.gov.uk/Notice/047310-2026 | | Notice type | UK7 - Contract Details Notice | | Procurement type | Framework | | Procurement category | Services | | Procurement method | Open | | Procurement method details | Open procedure | | Tender suitability | SME | | Awardee scale | Large | | All stages | Planning, Tender, Award | ## Dates | Field | Value | | --- | --- | | Publication date | 21 May 2026 | | Submission deadline | 16 Dec 2025 | | Future notice date | 14 Nov 2025 | | Award date | 3 Mar 2026 | | Contract period | 7 May 2026 - 31 Mar 2030 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | £2,500,000 | | Lots value | £2,000,000 | | Awards value | £625,000 | | Contracts value | £625,000 | ## Status | Field | Value | | --- | --- | | Tender status | Complete | | Lots status | Complete | | Awards status | Active | | Contracts status | Active | ## Buyer | Field | Value | | --- | --- | | Main buyer | NUCLEAR WASTE SERVICES LIMITED | | Locality | CALDERBRIDGE, SEASCALE | | Post town | Carlisle | | Postcode | CA20 1DB | | Country | England | | ITL 1 | TLD North West (England) | | ITL 2 | TLD1 Cumbria | | ITL 3 | TLD13 Cumberland | | Local authority | Cumberland | | Electoral ward | Gosforth | | Westminster constituency | Whitehaven and Workington | | Delivery location | Not specified | ## Supplier | Field | Value | | --- | --- | | Number of suppliers | 6 | | Supplier names | AMENTUM CLEAN ENERGY; AMPHOS 21 CONSULTING; BRGM; GALSON SCIENCES; NATIONAL NUCLEAR LABORATORY; SCK CEN | ## CPV Codes ### Divisions - 73 - Research and development services and related consultancy services ### Codes - 73000000 - Research and development services and related consultancy services ## Release History - 21 May 2026 at 15:04 - Award - UK7 - Contract Details Notice - https://www.find-tender.service.gov.uk/Notice/047310-2026 - 5 Mar 2026 at 16:25 - Award - UK6 - Contract Award Notice - https://www.find-tender.service.gov.uk/Notice/020104-2026 - 19 Nov 2025 at 15:59 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/075362-2025 - 13 Nov 2025 at 10:18 - Planning - UK3 - Planned Procurement Notice - https://www.find-tender.service.gov.uk/Notice/073423-2025 - 17 Jul 2025 at 12:07 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/040930-2025 - 23 May 2025 at 13:21 - Planning - UK1 - Pipeline Notice - https://www.find-tender.service.gov.uk/Notice/026491-2025 ## Documents - https://www.find-tender.service.gov.uk/Notice/047310-2026 21st May 2026 - Contract details notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/020104-2026 5th March 2026 - Contract award notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/075362-2025 19th November 2025 - Tender notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/073423-2025 13th November 2025 - Planned procurement notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/040930-2025 17th July 2025 - Preliminary market engagement notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/026491-2025 23rd May 2025 - Pipeline notice on Find a Tender ## Notice URLs - https://atamis-2464.my.site.com/s/Welcome - https://www.gov.uk/government/organisations/nuclear-waste-services/about - https://www.legislation.gov.uk/ukpga/2023/54/contents ## Provenance This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05230e. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-05230e.json.