---
title: "Decommissioning Nuclear Waste Partnership (DNWP)"
ocid: "ocds-h6vhtk-03ebdd"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-03ebdd"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-03ebdd.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-03ebdd.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "SELLAFIELD LIMITED"
published: "2025-11-03"
---

# Decommissioning Nuclear Waste Partnership (DNWP)

Buyer: SELLAFIELD LIMITED  
Current stage: Award  
OCID: ocds-h6vhtk-03ebdd

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## Summary

The Decommissioning Nuclear Waste Partnership (DNWP), led by Sellafield Ltd, focuses on the safe decommissioning of Europe's largest and most complex nuclear site. This comprehensive framework involves multiple partners working across four distinct lots, located at the Sellafield licenced site in the UK (region UKD11). The initiative is structured within the construction industry category, specifically targeting decommissioning activities. The current procurement stage has progressed to the award phase as of 3 November 2025, following a tender and selection process under a restricted procedure. Key contracts were signed on 30 October 2025, with significant value allocated to the various lots, such as Lot 1 (Remediation) with a total award value of £2.6 billion. The DNWP framework is set to operate over 15 years, aligning with the legal basis outlined under directive 32014L0024.

This tender offers significant business growth opportunities, particularly for companies with expertise in construction, engineering, and decommissioning services. Ideal candidates include large-scale enterprises capable of providing interdisciplinary services, such as safety case design, engineering consultancy, and site preparation. Selected partners, such as Amentum Clean Energy Limited and the consortium TDA (AtkinsRéalis UK, Amentum Clean Energy, Westinghouse Electric Company UK), illustrate the level of collaboration and technical capability required. Additionally, the framework's long-term vision through to 2040 allows firms to invest and innovate in technologies supporting nuclear waste management and remediation, thereby contributing to UK nuclear strategy and broader economic objectives.

## 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 Information

Lot 1 - Remediation

Lot 1 will consist of two Remediation Partners. The Remediation value stream will have a growing scope as more and more of the Sellafield site moves from operations into remediation and decommissioning. This will be reflected in a growing investment over the lifetime of the DNWP framework, subject to annual public sector funding constraints. 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. The focus of waste informed nuclear decommissioning up to 2040 includes clearing redundant buildings to make land available for beneficial re-use and preparing to decommission the UK's oldest nuclear reactor complexes and nuclear fuel handling facilities.

Options: Optional break at year 9

Lot 2 - Retrievals Ponds

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.

Options: Optional Break at Year 9

Lot 3 - Retrievals Silos

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. These buildings have traditionally presented some of the greatest challenges on the Sellafield site, but major progress is now being made on retrieving waste from the two ponds and the MSSS, with final preparations being made to retrieve waste from the PFCS.

Options: Optional break at Year 9

Lot 4 - Integrated Nuclear Waste

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.

Options: Optional Break at Year 9

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/070297-2025 |
| Notice type | Tender Notice |
| Procurement type | Framework |
| Procurement category | Works |
| Procurement method | Selective |
| Procurement method details | Restricted procedure |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Tender, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 3 Nov 2025 |
| Submission deadline | 9 Oct 2023 |
| Future notice date | Not specified |
| Award date | 30 Oct 2025 |
| Contract period | 5 Oct 2025 - 5 Nov 2040 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £4,600,000,000 |
| Lots value | £4,600,000,000 |
| Awards value | Not specified |
| Contracts value | £2,600,000,000 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Cancelled |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | SELLAFIELD LIMITED |
| Additional buyers | SELLAFIELD LTD |
| Locality | WARRINGTON |
| Post town | Warrington |
| Postcode | WA3 6GR |
| Country | England |
| ITL 1 | TLD North West (England) |
| ITL 2 | TLD6 Cheshire |
| ITL 3 | TLD61 Warrington |
| Local authority | Warrington |
| Electoral ward | Birchwood |
| Westminster constituency | Warrington North |
| Delivery location | TLD11 West Cumbria |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 4 |
| Supplier names | A2R (ALTRAD SUPPORT SERVICES LIMITED AND ATKINSRÉALIS; AMENTUM CLEAN ENERGY; NDS (ALTRAD SUPPORT SERVICES LTD, CAVENDISH NUCLEAR LTD, SHEPLEY ENGINEERS; TDA (ATKINSRÉALIS UK, AMENTUM CLEAN ENERGY, WESTINGHOUSE ELECTRIC |

## 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

- 3 Nov 2025 at 09:20 - Award - Award Notice - https://www.find-tender.service.gov.uk/Notice/070297-2025
- 14 Aug 2023 at 13:21 - TenderUpdate - Tender Notice - https://www.find-tender.service.gov.uk/Notice/023727-2023
- 31 Jul 2023 at 16:39 - Tender - Tender Notice - https://www.find-tender.service.gov.uk/Notice/022241-2023

## Notice URLs

- http://one-nda.force.com/s/Welcome
- https://www.find-court-tribunal.service.gov.uk/courts/royal-courts-of-justice
- https://www.gov.uk/government/organisations/sellafield-ltd

## 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-h6vhtk-03ebdd. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-03ebdd.json.