Decommissioning Nuclear Waste Partnership

Sellafield LimitedcontractContracts FinderRef CF-0261000D4L000000iAvzUAEcomplete
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Estimated value

£4.6bn

Awarded value

£4.6bn

Awarded 30 Oct 2025

Suppliers

1

Lots

1

1 awarded

Published

10 Nov 2025

Deadline 27 Jun 2024

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.

Scope

Reference
CF-0261000D4L000000iAvzUAE
Total value
£4,600,000,000 excluding VAT
Commercial tool
Standalone contract
Contract dates
30 Oct 2025 to 30 Oct 2040
CPV classifications
45220000 71530000 71321000 79400000 45000000 79410000 42000000 45315100 71322000 71320000 45210000 98391000 45100000 79723000 45111200 79415200 44421722 45111000 45111213 45000000 45351000 43320000 22314000 79933000 45222110

Submission & procedure

Submission deadline
27 Jun 2024, 3:00 pm

Award details

Awarded supplier(s), contract period and value as published in the award notice.

Awarded value

£4.6bn

Award date

30 Oct 2025

Contract start

30 Oct 2025

Contract end

30 Oct 2040