Published date: 10 November 2025
Awarded contract - This means that the contract has been awarded to a supplier.
Contract summary
Industry
Designs - 22314000
Industrial machinery - 42000000
Construction equipment - 43320000
Safety cases - 44421722
Construction work - 45000000
Site preparation work - 45100000
Demolition, site preparation and clearance work - 45111000
Site preparation and clearance work - 45111200
Site-clearance work - 45111213
Building construction work - 45210000
Engineering works and construction works - 45220000
Waste disposal site construction work - 45222110
Electrical engineering installation works - 45315100
Mechanical engineering installation works - 45351000
Engineering design services - 71320000
Engineering design services for mechanical and electrical installations for buildings - 71321000
Engineering design services for the construction of civil engineering works - 71322000
Construction consultancy services - 71530000
Business and management consultancy and related services - 79400000
Business and management consultancy services - 79410000
Design consultancy services - 79415200
Waste analysis services - 79723000
Design support services - 79933000
Decommissioning services - 98391000
Location of contract
CA20 1PG
Value of contract
£4,600,000,000
Procurement reference
CF-0261000D4L000000iAvzUAE
Published date
10 November 2025
Closing date
27 June 2024
Closing time
4pm
Contract start date
30 October 2025
Contract end date
30 October 2040
Contract type
Works
Procedure type
Restricted procedure (above threshold)
A two-stage procedure, where the first stage is used to select suppliers, who are then invited to bid in the second stage.
This procedure can be used for procurements above the relevant contract value threshold.
Contract is suitable for SMEs?
No
Contract is suitable for VCSEs?
No
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:
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.
Award information
Awarded date
30 October 2025
Contract start date
30 October 2025
Contract end date
30 October 2040
Total value of contract
£4,600,000,000
This contract was awarded to 4 suppliers.
TDA (AtkinsRéalis UK, Amentum Clean Energy, Westinghouse El
Address
Rutherford House, Westlakes Science Park, Moor Row, CA24 3HY
Reference
None
Supplier is SME?
No
Amentum Clean Energy Limited
Address
305 Bridgewater Place Birchwood Park, Birchwood, Warrington, WA36XF
Reference
None
Supplier is SME?
No
NDS (Altrad Support Services Ltd, Cavendish Nuclear Ltd, Shepley
Address
Units 6 & 7 Lyncastle Way Appleton Thorne Trading Estate Warrington, Warrington, WA4 4ST
Reference
None
Supplier is SME?
No
A2R (Altrad Support Services Limited and AtkinsRéalis UK Li
Address
Rutherford House, Westlakes Science Park, Whitehaven, CA24 3JZ
Reference
None
Supplier is SME?
No
About the buyer
Contact name
Michelle Edmondson
Address
Sellafield
Seascale
CA20 1PG
GB
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Closing: 27 June 2024, 4pm
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