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Trawsfynydd Reactor Buildings Height Reduction

Nuclear Restoration Services Limited

This public procurement record has 2 releases in its history.

Award

07 Oct 2025 at 15:41

Award Notice
Planning

01 Dec 2022 at 08:02

Planning Notice
Summary of the contracting process

The procurement process titled "Trawsfynydd Reactor Buildings Height Reduction" is managed by Nuclear Restoration Services Limited, focusing on demolition work within the works industry category. The location for this procurement is the Trawsfynydd Site in Blaenau Ffestiniog, Gwynedd, North Wales. As of the latest update on 7th October 2025, the process has reached the award stage, with Costain Limited being the awarded supplier for a contract value of £71,813,292. This was a competitive procedure with negotiation under the selective procurement method, compliant with the Public Procurement Contracts Regulations 2015. This project involves significant partial demolition, civil new build, and remedial works for decommissioning the nuclear reactor buildings, initially built in the early 1960s.

This tender presents substantial opportunities for businesses specialising in demolition, concrete repair, and decommissioning services. Companies skilled in scaffolding erection and dismantling, as well as the hiring of construction machinery, are particularly well-suited to compete in such a project. Additionally, with procurement focusing on quality and social value aspects, firms with strong technical capabilities and effective project management processes stand to benefit. The project's scale hints at a potential for long-term engagement, as ongoing decommissioning and site management create recurrent opportunities for expert service providers in nuclear decommissioning, civil engineering, and associated construction disciplines.

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Notice Information

Notice Title

Trawsfynydd Reactor Buildings Height Reduction

Notice Description

Partial demolition of the two reactor buildings, reducing their overall height , together with an extensive package of civil new build and remedial works.

Lot Information

Lot 1

NRS Ltd. is responsible for the safe and compliant decommissioning of Trawsfynydd Nuclear Power Station in Gwynedd, North Wales. Built in the early 1960's, the Site ceased generating electricity in 1991 and has been undertaking decommissioning works since.
The next phase of the decommissioning programme will principally feature modification of the two former civil nuclear Reactor Buildings which, in current state, offer safe and secure storage of housed plant. The project will involve the systematic deconstruction and partial demolition of each Reactor Building, delivering a reduced height configuration compliant with existing planning commitments and lessening the visual impact on the landscape. In addition, a package of civil new build and remedial works will be delivered to prolong the durability of the retained structures and reduce disproportionate asset management liability. The end product will offer compliant protection of the stored inventory, ready for successor phases of decommissioning activity on the Site.

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-0389bb
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/062969-2025
Current Stage
Award
All Stages
Planning, Award

Procurement Classification

Notice Type
Planning Notice
Procurement Type
Standard
Procurement Category
Works
Procurement Method
Selective
Procurement Method Details
Competitive procedure with negotiation
Tender Suitability
Not specified
Awardee Scale
Large

Common Procurement Vocabulary (CPV)

CPV Divisions

45 - Construction work

CPV Codes

45000000 - Construction work

45110000 - Building demolition and wrecking work and earthmoving work

45111000 - Demolition, site preparation and clearance work

45111100 - Demolition work

45111200 - Site preparation and clearance work

45111300 - Dismantling works

45113000 - Siteworks

45200000 - Works for complete or part construction and civil engineering work

45210000 - Building construction work

45262100 - Scaffolding work

45262110 - Scaffolding dismantling work

45262120 - Scaffolding erection work

45262300 - Concrete work

45262310 - Reinforced-concrete work

45262330 - Concrete repair work

45262660 - Asbestos-removal work

45500000 - Hire of construction and civil engineering machinery and equipment with operator

45510000 - Hire of cranes with operator

Notice Value(s)

Tender Value
£53,000,000 £10M-£100M
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
£71,813,292 £10M-£100M

Notice Dates

Publication Date
7 Oct 202510 months ago
Submission Deadline
Not specified
Future Notice Date
23 Mar 2023Expired
Award Date
2 Oct 202510 months ago
Contract Period
Not specified - Not specified
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Cancelled
Awards Status
Active
Contracts Status
Active

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
Nuclear Restoration Services Limited
Additional Buyers

Magnox Limited

Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
BRISTOL
Postcode
WA3 6GR
Postcode Area
Warrington
Country
England
Major Region (ITL 1)
TLD North West (England)
Basic Region (ITL 2)
TLD6 Cheshire
Small Region (ITL 3)
TLD61 Warrington
Delivery Location
TLL12 Gwynedd
Local Authority
Warrington
Electoral Ward
Birchwood
Westminster Constituency
Warrington North

Supplier Information

Number of Suppliers
1
Supplier Name

Costain Limited

Further Information

Open Contracting Data Standard (OCDS)

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

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