Award

Decommissioning Nuclear Waste Partnership (DNWP)

SELLAFIELD LIMITED

This public procurement record has 3 releases in its history.

Award

03 Nov 2025 at 09:20

TenderUpdate

14 Aug 2023 at 13:21

Tender

31 Jul 2023 at 16:39

Summary of the contracting process

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.

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Notice Title

Decommissioning Nuclear Waste Partnership (DNWP)

Notice Description

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:<br/><br/><br/>* Lot 1 Remediation Partners<br/>* Lot 2 Pond Retrievals Partner<br/>* Lot 3 Silos Retrievals Partner<br/>* 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

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-03ebdd
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/070297-2025
Current Stage
Award
All Stages
Tender, Award

Procurement Classification

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

Common Procurement Vocabulary (CPV)

CPV 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


CPV 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

Notice Value(s)

Tender Value
£4,600,000,000 £1B-£10B
Lots Value
£4,600,000,000 £1B-£10B
Awards Value
Not specified
Contracts Value
£2,600,000,000 £1B-£10B

Notice Dates

Publication Date
3 Nov 20253 months ago
Submission Deadline
9 Oct 2023Expired
Future Notice Date
Not specified
Award Date
30 Oct 20253 months ago
Contract Period
5 Oct 2025 - 5 Nov 2040 Over 5 years
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Cancelled
Awards Status
Active
Contracts Status
Active

Contracting Authority (Buyer)

Main Buyer
SELLAFIELD LIMITED
Additional Buyers

SELLAFIELD LTD

Contact Name
DNWP Competition Team, Michelle Edmondson
Contact Email
michelle.a.edmondson@sellafieldsites.com, stephen.x.williams@sellafieldsites.com
Contact Phone
Not specified

Buyer Location

Locality
WARRINGTON
Postcode
WA3 6GR
Post Town
Warrington
Country
England

Major Region (ITL 1)
TLD North West (England)
Basic Region (ITL 2)
TLD6 Cheshire
Small Region (ITL 3)
TLD61 Warrington
Delivery Location
TLD11 West Cumbria

Local Authority
Warrington
Electoral Ward
Birchwood
Westminster Constituency
Warrington North

Supplier Information

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

Open Contracting Data Standard (OCDS)

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

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