---
title: "CSSF-001 - Support to international post closure criticality safety projects."
ocid: "ocds-b5fd17-38999145-f93d-4ec1-91b4-0de364e8e95e"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-38999145-f93d-4ec1-91b4-0de364e8e95e"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-38999145-f93d-4ec1-91b4-0de364e8e95e.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-38999145-f93d-4ec1-91b4-0de364e8e95e.json"
source: "Contracts Finder"
current_stage: "Award"
buyer: "NUCLEAR WASTE SERVICES"
published: "2026-06-18"
---

# CSSF-001 - Support to international post closure criticality safety projects.

Buyer: NUCLEAR WASTE SERVICES  
Current stage: Award  
OCID: ocds-b5fd17-38999145-f93d-4ec1-91b4-0de364e8e95e

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## Summary

The procurement process for "CSSF-001 - Support to international post closure criticality safety projects" was conducted by Nuclear Waste Services, a British organisation located in Harwell. This contract falls under the research services category in the CPV scheme, with a project budget of £60,000. The procurement followed a selective method as a call-off from a framework agreement. The process has progressed to the award stage, with the contract being awarded on 3rd June 2026. The contract period extends from 11th June 2026 to 31st March 2027, with various delivery locations including the UK, Channel Islands, and Europe.

This tender presents growth opportunities for businesses engaged in the field of research services, particularly those focusing on nuclear safety and radioactive waste management. Companies like Amentum Clean Energy Limited and Galson Sciences Limited have already successfully been awarded this contract, indicating that firms with expertise in criticality safety and related research fields are well-suited to compete in such tenders. Businesses aiming to join similar framework agreements could benefit from monitoring future opportunities in this sector to expand their portfolio and enhance credibility in international safety projects.

## Notice

NWS are heavily involved in two international projects on post-closure criticality safety. These are: - Implementing Geological Disposal of radioactive waste Technology Platform (IGD-TP) Post-Closure Criticality Safety (PCCS) project, and work Package 1

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/ad8ac747-1f9d-4be7-ad13-5492215110b5 |
| Notice type | Award Notice |
| Procurement type | Framework |
| Procurement category | Services |
| Procurement method | Selective |
| Procurement method details | Call-off from a framework agreement |
| Tender suitability | Not specified |
| Awardee scale | Not specified |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 18 Jun 2026 |
| Submission deadline | 1 Jun 2026 |
| Future notice date | Not specified |
| Award date | 2 Jun 2026 |
| Contract period | 10 Jun 2026 - 31 Mar 2027 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £60,000 |
| Lots value | Not specified |
| Awards value | £20,000 |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Not specified |
| Awards status | Active |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NUCLEAR WASTE SERVICES |
| Locality | HARWELL |
| Post town | Not specified |
| Postcode | OX14 0GD |
| Country | Not specified |
| ITL 1 | Not specified |
| ITL 2 | Not specified |
| ITL 3 | Not specified |
| Local authority | Not specified |
| Electoral ward | Not specified |
| Westminster constituency | Not specified |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 2 |
| Supplier names | AMENTUM CLEAN ENERGY; GALSON SCIENCES |

## CPV Codes

### Divisions

- 73 - Research and development services and related consultancy services

### Codes

- 73110000 - Research services

## Release History

- 18 Jun 2026 at 15:49 - Award - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/ad8ac747-1f9d-4be7-ad13-5492215110b5

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/ad8ac747-1f9d-4be7-ad13-5492215110b5
  18th June 2026 - Awarded contract notice on Contracts Finder

## 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-b5fd17-38999145-f93d-4ec1-91b4-0de364e8e95e. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-38999145-f93d-4ec1-91b4-0de364e8e95e.json.