Reactor Buildings Height Reduction (EXECUTION phase)

Nuclear Restoration Services Ltd

Published: Oct 7, 2025

Updated: Jun 15, 2026

Source: uk_contracts_finder

This tender has been awarded

Awarded to Costain Limited — £71,813,292

Browse open Construction & Civil Works tenders in United Kingdom

About This Opportunity

construction & civil works works contract awarded in United Kingdom: Reactor Buildings Height Reduction (EXECUTION phase). By Nuclear Restoration Services Ltd.

This is a works contract in the construction and civil works sector. Located in United Kingdom, Europe, this opportunity is open to firms and consortiums, with an estimated budget of GBP 71.8 million.

Published through UK Contracts Finder, a national government procurement portal. Public procurement tenders follow the country's national bidding regulations and may have specific eligibility and documentation requirements for civil works in the construction and civil works sector. Works contracts of this nature generally require demonstrated experience in similar infrastructure projects, adequate equipment and technical personnel, and financial capacity including bank guarantees. This contract has already been awarded. The information is published for transparency and market intelligence purposes.

Description

The existing Reactor Buildings at Trawsfynydd are now life expired and require works to mitigate against further degradation, thus ensuring they remain safe and compliant for subsequent decommissioning activities. In addition there are long term commitments through the Town and Country Planning process to reduce the visual impact the buildings currently have on the landscape within the Snowdonia National Park.

The Height Reduction project has therefore been implemented with the objective of reducing the height of both reactor buildings such that they are left in a safe and stable configuration for the next phase of works to decommission the Trawsfynydd site whilst significantly reducing ongoing asset investment demands.

The reduction in height will also satisfy the requirements to lessen the visual impact the current full height buildings have within the Snowdonia National Park.. CPV: Hire of cranes with operator (45510000). Procedure: Competitive procedure with negotiation (above threshold)

Data provenance

This notice is sourced from UK Contracts Finder and was originally published on October 7, 2025. Last refreshed 10 days ago. Reference: CF-0253700D4L000000iAvzUAE. BidsFactory mirrors official procurement notices and links back to the source for full legal text.

About Nuclear Restoration Services Ltd

Nuclear Restoration Services Ltd has issued 16 procurement notices on BidsFactory, including 0 currently open and 15 awarded contracts. Activity concentrates in Architecture & Engineering Services, Environment & Climate, and Construction & Civil Works. All notices are published for United Kingdom. Notices are distributed via UK Contracts Finder. Most recent publication: April 23, 2026.

Frequently asked questions about this tender

How much was the contract awarded for?

Costain Limited was awarded the contract for £71,813,292. The figure reflects the value disclosed by the contracting authority in the award notice.

Where will the contract be performed?

The contract is for delivery in United Kingdom. Foreign bidders should review local registration, taxation, and any in-country presence requirements before submitting.

How can I submit a bid?

Visit UK Contracts Finder to access the full notice, required documents, and submission instructions. Quote reference CF-0253700D4L000000iAvzUAE when communicating with the contracting authority.

Is this tender still open?

No — the contract has already been awarded to Costain Limited. The award notice is archived on BidsFactory for transparency and market intelligence.

Who is the contracting authority?

This notice was issued by Nuclear Restoration Services Ltd in United Kingdom. The authority is responsible for evaluating bids, awarding the contract, and managing performance.

What type of contract is this?

This is a Works contract in the Construction & Civil Works sector. The classification helps bidders match the opportunity to their qualifications and registered scope of supply.