PERMANENT AWARD EVIDENCE

Reactor Buildings Height Reduction (EXECUTION phase)

Nuclear Restoration Services Ltd · published 7 Oct 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 ID64653164-9879-4b04-8195-949ce6ff8677-867208
Open Contracting ID (OCID)ocds-b5fd17-b2d6aadb-d278-4c55-b3a4-a286427e08d5
Buyer identifierGB-CFS-325874
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
£71,813,292
award field
Tender value
£71,813,292
tender field
Procurement method
Competitive procedure with negotiation (above threshold)
Category
works
CPV
45510000
Hire of cranes with operator
Delivery
Not stated
LL41 4DT
PUBLISHED DESCRIPTION

What the notice says

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.

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 release7 Oct 2025
  2. 02Tender period endsTender-period field as published19 Dec 2024
  3. 03Contract startsContract-period field as published5 Oct 2025
  4. 04Contract endsContract-period field as published29 Mar 2029
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

Costain Limited

No legal entity is inferred from this supplier name.

SOURCE

Contracts Finder release

Published 7 Oct 2025 · held through the daily award projection · Open Government Licence v3.0.

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