System operational · UK tenders
Awarded
ocds-h6vhtk-05230e · award

ThermoChimie Phase 4 Framework

Nuclear Waste Services Limited

Estimated Value

Up to £2,500,000

Deadline

16 December 2025

Published

21 May 2026

Type

Not specified

North WestGBopen

Overview

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.

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Award Details

Amphos 21 Consulting S.L.

3 Mar 20261 Apr 2026 – 31 Mar 2029

£2,500,000

Amentum Clean Energy Limited

3 Mar 20261 Apr 2026 – 31 Mar 2029

£2,500,000

BRGM

3 Mar 20261 Apr 2026 – 31 Mar 2029

£2,500,000

SCK CEN

3 Mar 20261 Apr 2026 – 31 Mar 2029

£2,500,000

National Nuclear Laboratory

3 Mar 20261 Apr 2026 – 31 Mar 2029

£2,500,000

Galson Sciences Limited

3 Mar 20261 Apr 2026 – 31 Mar 2029

£2,500,000

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AMENTUM CLEAN ENERGY LIMITED is the most likely incumbent based on recency and category match. To win, bidders typically need a clearly differentiated proposition or a price advantage.

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Buyer Profile

Nuclear Waste Services Limited
Typepublic body
RegionUKD1
Total tenders40
Total spend£1,881,633,555
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Key Dates

Published

21 May 2026

Submission deadline

16 December 2025

Notice type

award

Source

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