AwardedAwarded 8 May 2026

ThermoChimie Phase 4 Framework

Nuclear Waste Services Limited · Local or regional public body

In brief

Nuclear Waste Services Limited awarded research work to Amentum Clean Energy Limited, United Kingdom National Nuclear Laboratory and Amphos 21 Consulting S.L. and 3 others on 8 May 2026.

It is a framework worth up to £2,500,000 excluding VAT: the most the buyer expects to spend across all suppliers, not one contract.

The contract runs for 3 years, up to 5 years with extensions, starting 1 February 2026.

It is split into 4 lots, so a supplier can bid for part of the work.

Built from the notice's own fields. Always check the official notice before you bid.

What the notice says

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.

Lots

LotTradeValue
Lot 1
1 February 2026 to 31 January 2029
What this lot covers

Secretariat (One Supplier - Direct Award)

Research and development£500,000
Lot 2
1 February 2026 to 31 January 2029
What this lot covers

Lot 2 - Database and Website Management / Maintenance (One Supplier - Direct Award)

Research and development£500,000
Lot 3
1 February 2026 to 31 January 2029
What this lot covers

Lot 3 - Desk Studies: Data Generation, Selection, Assessment and Verification (Multiple Suppliers, Mini Competition)

Research and development£500,000
Lot 4
1 February 2026 to 31 January 2029
What this lot covers

Lot 4 - Experimental Studies: Data Generation, Model Verification (Multiple Suppliers, Mini Competition)

Research and development£500,000

Who won

WinnerLotValueDates
Amentum Clean Energy Limited
United Kingdom National Nuclear Laboratory
Amphos 21 Consulting S.L.
BRGM
SCK Cen
Galson Sciences Limited
3 bids received
Lot 1£625,000
Awarded 3 March 2026
8 May 2026 to 31 March 2030
Amphos 21 Consulting S.L.
Galson Sciences Limited
2 bids received
Lot 2£625,000
Awarded 3 March 2026
8 May 2026 to 31 March 2030
Amentum Clean Energy Limited
United Kingdom National Nuclear Laboratory
Amphos 21 Consulting S.L.
BRGM
SCK Cen
5 bids received
Lot 3£625,000
Awarded 3 March 2026
8 May 2026 to 31 March 2030
Amentum Clean Energy Limited
United Kingdom National Nuclear Laboratory
Amphos 21 Consulting S.L.
BRGM
5 bids received
Lot 4£625,000
Awarded 3 March 2026
8 May 2026 to 31 March 2030

Values as the award notice gives them, excluding VAT where stated.

Timeline

  1. Planned procurement notice · UK3, notice 073423-2025
  2. Tender notice · UK4, notice 075362-2025
  3. Contract award notice · UK6, notice 020104-2026
  4. Contract details notice · UK7, notice 047310-2026

About the buyer

Procurements

24

Awards

11

Suppliers it has used most for research

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From notice 073423-2025 on Find a Tender, first published 13 November 2025, last updated 21 May 2026. We last checked for changes on 28 September 2026.