---
title: "CSSF-002 - GDF Criticality Safety Methodology and Assessments"
ocid: "ocds-b5fd17-80416bbd-3d0a-4a38-95ac-cd18934853e8"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-80416bbd-3d0a-4a38-95ac-cd18934853e8"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-80416bbd-3d0a-4a38-95ac-cd18934853e8.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-80416bbd-3d0a-4a38-95ac-cd18934853e8.json"
source: "Contracts Finder"
current_stage: "Award"
buyer: "NUCLEAR WASTE SERVICES"
published: "2026-06-18"
---

# CSSF-002 - GDF Criticality Safety Methodology and Assessments

Buyer: NUCLEAR WASTE SERVICES  
Current stage: Award  
OCID: ocds-b5fd17-80416bbd-3d0a-4a38-95ac-cd18934853e8

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## Summary

The procurement process for the "CSSF-002 - GDF Criticality Safety Methodology and Assessments" has been completed by Nuclear Waste Services, based in Harwell, UK. This tender falls under the industry category of research services, classified with CPV code 73110000, and involves criticality safety assessments for 500-litre drums and Pressurised Water Reactor (PWR) spent fuel. The procurement method used was selective, as a call-off from a framework agreement. The contracting phase included a contract period from 29th May 2026 to 31st May 2026, with the award date being 20th May 2026. While the main delivery location is detailed as OX11 0GD in the UK, it encompasses other regions, including British Overseas Territories, Channel Islands, Europe, Isle of Man, and the Rest of the World.

This tender creates growth opportunities within the research services sector, specifically for businesses specialised in nuclear safety and criticality assessments. Companies like AMENTUM CLEAN ENERGY LIMITED and Galson Sciences Limited, which have been awarded contracts, are examples of organisations suited for such projects. Business growth can be achieved by offering innovative solutions and expertise in safety assessments for nuclear materials. This contract presents opportunities primarily to medium to large enterprises capable of adhering to the rigorous safety standards and technical requirements associated with nuclear waste management projects.

## Notice

The scope of Phase 1 includes the delivery of: * Sub-task 1A: Criticality Safety Assessments for 500 litre drums * Sub-task 2A: Criticality Safety Assessments for Pressurised Water Reactor (PWR) Spent Fuel

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/24f4be72-81eb-40ab-abf6-f70306009398 |
| 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 | 18 May 2026 |
| Future notice date | Not specified |
| Award date | 19 May 2026 |
| Contract period | 28 May 2026 - 31 May 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £80,000 |
| Lots value | Not specified |
| Awards value | £40,000 |
| 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 | Oxford |
| Postcode | OX11 0GD |
| Country | England |
| ITL 1 | TLJ South East (England) |
| ITL 2 | TLJ1 Berkshire, Buckinghamshire and Oxfordshire |
| ITL 3 | TLJ14 Oxfordshire CC |
| Local authority | Vale of White Horse |
| Electoral ward | Hendreds |
| Westminster constituency | Didcot and Wantage |
| 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 15:50 - Award - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/24f4be72-81eb-40ab-abf6-f70306009398

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/24f4be72-81eb-40ab-abf6-f70306009398
  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-b5fd17-80416bbd-3d0a-4a38-95ac-cd18934853e8. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-80416bbd-3d0a-4a38-95ac-cd18934853e8.json.