---
title: "Decommissioning Nuclear Waste Partnership"
ocid: "ocds-b5fd17-a4d8dd6b-a51d-430d-89f1-8a04c1fac9fb"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-a4d8dd6b-a51d-430d-89f1-8a04c1fac9fb"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-a4d8dd6b-a51d-430d-89f1-8a04c1fac9fb.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-a4d8dd6b-a51d-430d-89f1-8a04c1fac9fb.json"
source: "Contracts Finder"
current_stage: "Award"
buyer: "SELLAFIELD LIMITED"
published: "2025-11-10"
---

# Decommissioning Nuclear Waste Partnership

Buyer: SELLAFIELD LIMITED  
Current stage: Award  
OCID: ocds-b5fd17-a4d8dd6b-a51d-430d-89f1-8a04c1fac9fb

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## Summary

Sellafield Ltd, a prominent player in nuclear site management, has awarded a significant contract titled "Decommissioning Nuclear Waste Partnership" under the selective procurement method using a restricted procedure above threshold. This initiative is part of the Decommissioning and Nuclear Waste Partners (DNWP) Framework aimed at tackling the challenges presented by Europe's largest nuclear site. The framework has brought together four partners under different Lots, covering diverse aspects of nuclear site management, including remediation, pond and silos retrievals, and integrated nuclear waste management. Based in Seascale, the contract period spans from 30th October 2025 to 30th October 2040, with a massive contract value of £4.6 billion. The award date was 30th October 2025, with a prior tender completion date set for 27th June 2024, highlighting a thorough procurement process by Sellafield Ltd.

This contract presents a vast arena of opportunities for large enterprises involved in engineering works, construction, consultancy, and waste management. With the comprehensive work scope covering engineering and construction activities, safety case designs, and waste management, businesses with expertise in these areas have the potential for significant growth through partnership and subcontracting opportunities. The opportunity is particularly suitable for those with a capacity to handle large-scale projects and a history of successful engagements in high-risk infrastructure environments. Although the opportunity may not suit SMEs, it provides a growth avenue for large enterprises looking to make a substantial impact in the nuclear decommissioning sector. The collaboration across various stages of the nuclear waste lifecycle also indicates extensive networking and partnership possibilities within the industry.

## Notice

Sellafield Ltd is responsible for safely operating and decommissioning Europe's largest, most complex nuclear site, which is home to legacy nuclear facilities that are some of the most hazardous buildings in Western Europe. Sellafield Ltd, through the Decommissioning and Nuclear Waste Partners (DNWP) Framework opportunity, has brought together four partners across four Lots to provide a full suite of expertise and support to deliver decommissioning activities and projects, including asset care. Delivery will be across nuclear facilities on the Sellafield licenced site that are in mix of states including operational, post operation clean out (POCO), decommissioning and demolition. Consequently, the scope of work for the DNWP Framework will include construction delivery, demolition related works, associated technical services (including safety case and design) and waste management with the scope aligned across the following four Lots: Lot 1 Remediation Partners Lot 2 Pond Retrievals Partner Lot 3 Silos Retrievals Partner Lot 4 Integrated Nuclear Waste Partner Lot 1 will consist of two Remediation Partners. Remediation is about cleaning up the Sellafield site over the next century as safely and cost-effectively as possible. As an asset reaches the end of its operational life, remediation addresses the nuclear, radiological and conventional risks through post-operation clean-out, decommissioning, demolition and land remediation. Lot 2 will consist of a Ponds Partner, encompassing both the First Generation Magnox Storage Pond ("FGMSP") , associated buildings and the Pile Fuel Storage Pond ("PFSP"). and associated buildings. Legacy Ponds is the Operating Unit (OU) organisation within the Retrievals value stream of Sellafield that is charged with managing the programmes of work for the FGMSP and the PFSP. These are two legacy nuclear storage ponds that retain significant radiological materials and hazards that require timely mitigation, principally by retrieving the materials to downstream treatment and storage/disposal facilities while maintaining a safe and secure environment. Lot 3 will consist of a Silos Partner, encompassing both the Magnox Swarf Storage Silo ("MSSS") and Pile Fuel Cladding Silo ("PFCS"). The Retrievals value stream is responsible for managing the site's major hazard and risk reduction programme: retrieving the waste from Sellafield's four highest risk legacy storage facilities. Lot 4 will consist of a single enterprise-wide Integrated Nuclear Waste Partner. This Nuclear Waste Partner will work through the Waste Operating Unit ("Waste OU"). The Waste OU is part of the Remediation Portfolio, it includes a dedicated programme providing enabling activities across the Sellafield enterprise with major customers being the DNWP Remediation & Retrievals Partners.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/6d4229ba-fc62-49f3-a066-5a41982c23bf |
| Notice type | Award Notice |
| Procurement type | Standard |
| Procurement category | Works |
| Procurement method | Selective |
| Procurement method details | Restricted procedure (above threshold) |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 10 Nov 2025 |
| Submission deadline | 27 Jun 2024 |
| Future notice date | Not specified |
| Award date | 30 Oct 2025 |
| Contract period | 30 Oct 2025 - 30 Oct 2040 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £4,600,000,000 |
| Lots value | Not specified |
| Awards value | £4,600,000,000 |
| 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 | SELLAFIELD LIMITED |
| Locality | SEASCALE |
| Post town | Carlisle |
| Postcode | CA20 1PG |
| 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 | 4 |
| Supplier names | A2R (ALTRAD SUPPORT SERVICES LIMITED AND ATKINSRÉALIS UK LI; AMENTUM CLEAN ENERGY; NDS (ALTRAD SUPPORT SERVICES LTD, CAVENDISH NUCLEAR LTD, SHEPLEY; TDA (ATKINSRÉALIS UK, AMENTUM CLEAN ENERGY, WESTINGHOUSE EL |

## CPV Codes

### Divisions

- 22 - Printed matter and related products
- 42 - Industrial machinery
- 43 - Machinery for mining, quarrying, construction equipment
- 44 - Construction structures and materials; auxiliary products to construction (except electric apparatus)
- 45 - Construction work
- 71 - Architectural, construction, engineering and inspection services
- 79 - Business services: law, marketing, consulting, recruitment, printing and security
- 98 - Other community, social and personal services

### Codes

- 22314000 - Designs
- 42000000 - Industrial machinery
- 43320000 - Construction equipment
- 44421722 - Safety cases
- 45000000 - Construction work
- 45100000 - Site preparation work
- 45111000 - Demolition, site preparation and clearance work
- 45111200 - Site preparation and clearance work
- 45111213 - Site-clearance work
- 45210000 - Building construction work
- 45220000 - Engineering works and construction works
- 45222110 - Waste disposal site construction work
- 45315100 - Electrical engineering installation works
- 45351000 - Mechanical engineering installation works
- 71320000 - Engineering design services
- 71321000 - Engineering design services for mechanical and electrical installations for buildings
- 71322000 - Engineering design services for the construction of civil engineering works
- 71530000 - Construction consultancy services
- 79400000 - Business and management consultancy and related services
- 79410000 - Business and management consultancy services
- 79415200 - Design consultancy services
- 79723000 - Waste analysis services
- 79933000 - Design support services
- 98391000 - Decommissioning services

## Release History

- 10 Nov 2025 at 09:02 - Award - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/6d4229ba-fc62-49f3-a066-5a41982c23bf

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/6d4229ba-fc62-49f3-a066-5a41982c23bf
  10th November 2025 - 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-a4d8dd6b-a51d-430d-89f1-8a04c1fac9fb. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-a4d8dd6b-a51d-430d-89f1-8a04c1fac9fb.json.