Contract award notice
Results of the procurement procedure
Section I: Contracting
entity
I.1) Name and addresses
Sellafield Limited
01002607
Hinton House, Birchwood Park Avenue
Warrington
WA3 6GR
UK
Contact person: Michelle Edmondson
E-mail: michelle.a.edmondson@sellafieldsites.com
NUTS: UKD1
Internet address(es)
Main address: https://www.gov.uk/government/organisations/sellafield-ltd
Address of the buyer profile: https://www.gov.uk/government/organisations/sellafield-ltd
I.4) Type of the contracting authority
Body governed by public law
I.5) Main activity
Other: Nuclear Decommissioning
Section II: Object
II.1) Scope of the procurement
II.1.1) Title
Decommissioning Nuclear Waste Partnership (DNWP)
II.1.2) Main CPV code
45000000
II.1.3) Type of contract
Works
II.1.4) Short 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
II.1.6) Information about lots
This contract is divided into lots:
Yes
II.1.7) Total value of the procurement
Value excluding VAT:
4 600 000 000.00
GBP
II.2) Description
Lot No: 1
II.2.1) Title
Lot 1 - Remediation
II.2.2) Additional CPV code(s)
45000000
79410000
42000000
45315100
71322000
71320000
45210000
98391000
71321000
79400000
45100000
45111200
79723000
79415200
45220000
44421722
45111000
45111213
45000000
45351000
71530000
43320000
22314000
79933000
45222110
II.2.3) Place of performance
NUTS code:
UKD11
Main site or place of performance:
Sellafield Site
II.2.4) Description of the procurement
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.
II.2.5) Award criteria
Quality criterion: Technical
/ Weighting: 70
Price
/ Weighting:
30
II.2.11) Information about options
Options:
No
II.2.13) Information about European Union funds
The procurement is related to a project and/or programme financed by European Union funds:
No
Lot No: 2
II.2.1) Title
Lot 2 - Retrievals Ponds
II.2.2) Additional CPV code(s)
45000000
45220000
45351000
79400000
45222110
45100000
45111000
45111200
79723000
79415200
71320000
45315100
71322000
44421722
43320000
71530000
98391000
45000000
42000000
45111213
22314000
71321000
79933000
79410000
45210000
II.2.3) Place of performance
NUTS code:
UKD11
Main site or place of performance:
Sellafield Site
II.2.4) Description of the procurement
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.<br/><br/>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.
II.2.5) Award criteria
Quality criterion: Technical
/ Weighting: 70
Price
/ Weighting:
30
II.2.11) Information about options
Options:
No
II.2.13) Information about European Union funds
The procurement is related to a project and/or programme financed by European Union funds:
No
Lot No: 3
II.2.1) Title
Lot 3 - Retrievals Silos
II.2.2) Additional CPV code(s)
45000000
45210000
45315100
71530000
79410000
71320000
98391000
71321000
79723000
79933000
45222110
45351000
45111213
43320000
44421722
79400000
45220000
45000000
79415200
22314000
45100000
45111000
42000000
45111200
71322000
II.2.3) Place of performance
NUTS code:
UKD11
Main site or place of performance:
Sellafield Site
II.2.4) Description of the procurement
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.
II.2.5) Award criteria
Quality criterion: Technical
/ Weighting: 70
Price
/ Weighting:
30
II.2.11) Information about options
Options:
No
II.2.13) Information about European Union funds
The procurement is related to a project and/or programme financed by European Union funds:
No
Lot No: 4
II.2.1) Title
Lot 4 - Integrated Nuclear Waste
II.2.2) Additional CPV code(s)
45000000
45111200
45351000
79933000
22314000
45210000
79415200
98391000
45000000
45220000
45111200
43320000
71320000
71321000
45222110
79723000
42000000
71530000
79410000
71322000
45100000
44421722
45111000
45111213
79400000
45315100
II.2.3) Place of performance
NUTS code:
UKD11
Main site or place of performance:
Sellafield Site
II.2.4) Description of the procurement
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.
II.2.5) Award criteria
Quality criterion: Technical
/ Weighting: 70
Price
/ Weighting:
30
II.2.11) Information about options
Options:
No
II.2.13) Information about European Union funds
The procurement is related to a project and/or programme financed by European Union funds:
No
Section IV: Procedure
IV.1) Description
IV.1.1) Type of procedure
Restricted procedure
IV.1.3) Information about a framework agreement or a dynamic purchasing system
The procurement involves the establishment of a framework agreement
IV.1.8) Information about Government Procurement Agreement (GPA)
The procurement is covered by the Government Procurement Agreement:
Yes
IV.2) Administrative information
IV.2.1) Previous publication concerning this procedure
Notice number in the OJ S:
2023/S 000-022241
Section V: Award of contract
Lot No: 1
Title: Lot 1 - Remediation
A contract/lot is awarded:
Yes
V.2 Award of contract
V.2.1) Date of conclusion of the contract
30/10/2025
V.2.2) Information about tenders
Number of tenders received: 5
Number of tenders received from SMEs: 0
Number of tenders received from tenderers from EU Member States: 0
Number of tenders received from tenderers from non-EU Member States: 0
Number of tenders received by electronic means: 5
The contract has been awarded to a group of economic operators:
No
V.2.3) Name and address of the contractor
Amentum Clean Energy Limited
01120437
305 Bridgewater Place Birchwood Park, Birchwood
Warrington
WA36XF
UK
NUTS: UKD6
The contractor is an SME:
No
V.2.4) Information on value of the contract/lot (excluding VAT)
Initial estimated total value of the contract/lot:
Total value of the contract/lot:
: 1 000 000 000.00
GBP
V.2.5) Information about subcontracting
The contract is likely to be subcontracted
Value or proportion likely to be subcontracted to third parties
Proportion: 41 %
Section V: Award of contract
Lot No: 1
Title: Lot 1 - Remediation
A contract/lot is awarded:
Yes
V.2 Award of contract
V.2.1) Date of conclusion of the contract
30/10/2025
V.2.2) Information about tenders
Number of tenders received: 5
Number of tenders received from SMEs: 0
Number of tenders received from tenderers from EU Member States: 0
Number of tenders received from tenderers from non-EU Member States: 0
Number of tenders received by electronic means: 5
The contract has been awarded to a group of economic operators:
No
V.2.3) Name and address of the contractor
A2R (Altrad Support Services Limited and AtkinsRéalis UK Limited)
n/a
Rutherford House, Westlakes Science Park
Whitehaven
CA24 3JZ
UK
NUTS: UKD11
The contractor is an SME:
No
V.2.4) Information on value of the contract/lot (excluding VAT)
Initial estimated total value of the contract/lot:
Total value of the contract/lot:
: 1 600 000 000.00
GBP
V.2.5) Information about subcontracting
The contract is likely to be subcontracted
Value or proportion likely to be subcontracted to third parties
Proportion: 41 %
Section V: Award of contract
Lot No: 2
Title: Lot 2 - Retrievals Ponds
A contract/lot is awarded:
Yes
V.2 Award of contract
V.2.1) Date of conclusion of the contract
30/10/2025
V.2.2) Information about tenders
Number of tenders received: 1
Number of tenders received from SMEs: 0
Number of tenders received from tenderers from EU Member States: 0
Number of tenders received from tenderers from non-EU Member States: 0
Number of tenders received by electronic means: 1
The contract has been awarded to a group of economic operators:
No
V.2.3) Name and address of the contractor
TDA (AtkinsRéalis UK, Amentum Clean Energy, Westinghouse Electric Company UK)
Rutherford House, Westlakes Science Park
Moor Row
CA24 3HY
UK
NUTS: UKD11
The contractor is an SME:
No
V.2.4) Information on value of the contract/lot (excluding VAT)
Initial estimated total value of the contract/lot:
Total value of the contract/lot:
: 1 000 000 000.00
GBP
V.2.5) Information about subcontracting
Section V: Award of contract
Lot No: 3
Title: Lot 3 - Retrievals Silos
A contract/lot is awarded:
Yes
V.2 Award of contract
V.2.1) Date of conclusion of the contract
30/10/2025
V.2.2) Information about tenders
Number of tenders received: 1
Number of tenders received from SMEs: 0
Number of tenders received from tenderers from EU Member States: 0
Number of tenders received from tenderers from non-EU Member States: 0
Number of tenders received by electronic means: 1
The contract has been awarded to a group of economic operators:
No
V.2.3) Name and address of the contractor
NDS (Altrad Support Services Ltd, Cavendish Nuclear Ltd, Shepley Engineers Ltd)
n/a
Units 6 & 7 Lyncastle Way Appleton Thorne Trading Estate Warrington
Warrington
WA4 4ST
UK
NUTS: UKD61
The contractor is an SME:
No
V.2.4) Information on value of the contract/lot (excluding VAT)
Initial estimated total value of the contract/lot:
Total value of the contract/lot:
: 1 000 000 000.00
GBP
V.2.5) Information about subcontracting
The contract is likely to be subcontracted
Value or proportion likely to be subcontracted to third parties
Proportion: 1 %
Section V: Award of contract
Lot No: 4
Title: Lot 4 - Integrated Nuclear Waste
A contract/lot is awarded:
Yes
V.2 Award of contract
V.2.1) Date of conclusion of the contract
30/10/2025
V.2.2) Information about tenders
Number of tenders received: 3
Number of tenders received from SMEs: 0
Number of tenders received from tenderers from EU Member States: 0
Number of tenders received from tenderers from non-EU Member States: 0
Number of tenders received by electronic means: 3
The contract has been awarded to a group of economic operators:
No
V.2.3) Name and address of the contractor
A2R (Altrad Support Services Limited and AtkinsRéalis UK Limited)
n/a
Rutherford House, Westlakes Science Park
Whitehaven
CA24 3JZ
UK
NUTS: UKD11
The contractor is an SME:
No
V.2.4) Information on value of the contract/lot (excluding VAT)
Initial estimated total value of the contract/lot:
Total value of the contract/lot:
: 1 600 000 000.00
GBP
V.2.5) Information about subcontracting
Section VI: Complementary information
VI.4) Procedures for review
VI.4.1) Review body
Royal Courts Of Justice
Strand
London
WC2A 2LL
UK
E-mail: rcj.dco@justice.gov.uk
Internet address(es)
URL: https://www.find-court-tribunal.service.gov.uk/courts/royal-courts-of-justice
VI.5) Date of dispatch of this notice
03/11/2025