PERMANENT AWARD EVIDENCE

Decommissioning Nuclear Waste Partnership

Sellafield Limited · published 10 Nov 2025. This page preserves the identifiers and current held fields for one Contracts Finder release; it is not an invoice, performance assessment or complete contract history.

Contracts Finder release ID6d4229ba-fc62-49f3-a066-5a41982c23bf-871403
Open Contracting ID (OCID)ocds-b5fd17-a4d8dd6b-a51d-430d-89f1-8a04c1fac9fb
Buyer identifierGB-CFS-279061
Release typeaward
PUBLISHED COMMERCIAL FIELDS

Values stay separate.

A tender estimate and an award value answer different questions. Neither is treated as cash paid.

Award value
£4,600,000,000
award field
Tender value
£4,600,000,000
tender field
Procurement method
Restricted procedure (above threshold)
Category
works
CPV
45220000
Engineering works and construction works
Delivery
Not stated
CA20 1PG
PUBLISHED DESCRIPTION

What the notice says

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.

Tender statuscomplete
STAGE-DATE LEDGER

Reported dates, without an invented lifecycle.

The current projection contains one award release, not a verified chain of planning, tender, award, contract and modification records. Dates are shown in source-field order and are not silently repaired.

  1. 01Notice publishedPublication timestamp on the held release10 Nov 2025
  2. 02Tender period endsTender-period field as published27 Jun 2024
  3. 03Contract startsContract-period field as published30 Oct 2025
  4. 04Contract endsContract-period field as published30 Oct 2040
SUPPLIER EVIDENCE

Published names and exact identifiers

A company profile appears only when this release carries a usable company number. Name-only suppliers remain name-only.

Published name only

A2R (Altrad Support Services Limited and AtkinsRéalis UK Li

No legal entity is inferred from this supplier name.

Published name only

Amentum Clean Energy Limited

No legal entity is inferred from this supplier name.

Published name only

NDS (Altrad Support Services Ltd, Cavendish Nuclear Ltd, Shepley

No legal entity is inferred from this supplier name.

Published name only

TDA (AtkinsRéalis UK, Amentum Clean Energy, Westinghouse El

No legal entity is inferred from this supplier name.

SOURCE

Contracts Finder release

Published 10 Nov 2025 · held through the daily award projection · Open Government Licence v3.0.

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