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Awarded · ResultStage · contract

Sellafield Limited

Decommissioning Nuclear Waste Partnership

ConstructionCPV 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
Value£4600.0m
Awarded27 Jun 2024
Published10 Nov 2025
RegionUK-wide
Outcome — awarded

This is a contract result notice, not an open opportunity. Details from the official award data.

Contract value in context
£4600.0mtotal contract value
median £158k
this tender£0£4968.0m

This is a large award for Construction — above three-quarters of comparable contracts. Based on 64,002 valued Construction tenders in our corpus.

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The brief

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 requirements

What the supplier must deliver

01

Sellafield Ltd is responsible for safely operating

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.

02

Sellafield Ltd, through the Decommissioning and Nuclear

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.

03

Lot 4 Integrated Nuclear Waste Partner

Lot 4 Integrated Nuclear Waste Partner.

04

The Retrievals value stream is responsible

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.

05

Lot 4 will consist of a single

Lot 4 will consist of a single enterprise-wide Integrated Nuclear Waste Partner.

Derived from the notice text — always confirm against the original documents.

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Source & provenance
OCID
6d4229ba-fc62-49f3-a066-5a41982c23bf
Stage
contract · Contract
Source
Contracts Finder
Buyer ref
CF-0261000D4L000000iAvzUAE
View the original notice on Contracts Finder

Contains public sector information licensed under the Open Government Licence v3.0. Source data © Crown copyright.

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