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PROCUREMENT OPPORTUNITY

Trawsfynydd Reactor Buildings Height Reduction

Nuclear Restoration Services Limited · compiled

Tender information last checkedLast checked 29 Sept 2026, 18:46.

Opportunity overview

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

Awarded to

Amounts belong to published awards or contracts. Where several suppliers share one value, it is labelled as shared and is not a supplier-specific allocation.

Costain Limited

Matched by exact name
Contract value
£71.8m
Awarded
Not supplied
Contract signed
1 Oct 2025
Award ID
062969-2025-1
Status
active
Identifier
00610201
Location
London, UK, EC3A 8BE, United Kingdom

Classification

  • CPV45000000 — Construction work
  • CPV45110000 — Building demolition and wrecking work and earthmoving work
  • CPV45111000 — Demolition, site preparation and clearance work
  • CPV45111100 — Demolition work
  • CPV45111200 — Site preparation and clearance work
  • CPV45111300 — Dismantling works
  • CPV45113000 — Siteworks
  • CPV45200000 — Works for complete or part construction and civil engineering work
  • CPV45210000 — Building construction work
  • CPV45262100 — Scaffolding work
  • CPV45262110 — Scaffolding dismantling work
  • CPV45262120 — Scaffolding erection work
  • CPV45262300 — Concrete work
  • CPV45262310 — Reinforced-concrete work
  • CPV45262330 — Concrete repair work
  • CPV45262660 — Asbestos-removal work
  • CPV45500000 — Hire of construction and civil engineering machinery and equipment with operator
  • CPV45510000 — Hire of cranes with operator

Lots

  • 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. <br/>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.Value not stated

Published notice details

Additional information from the published procurement release. Fields appear only when supplied by the source; check the original notice and tender documents before acting.

Scope, procedure and submissions

Id
ocds-h6vhtk-0389bb
Status
complete
Review Details
In accordance with Chapter 6 of the Public Procurement Contracts Regulations 2015 (as amended).
Procurement Method
selective
Main Procurement Category
works
Procurement Method Details
Competitive procedure with negotiation

Covered By

GPA

Legal basis

Id
32014L0024
Scheme
CELEX

Communication

Future Notice Date
23 Mar 2023, 00:00

Classification

Id
45111100
Scheme
CPV
Description
Demolition work

Lots and requirements

Entry 1
Id
1
Status
cancelled
Has Options
No
Description
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. <br/>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.

Award criteria

Criteria

Criterion 1
Name
Social Value
Type
quality
Description
10%
Criterion 2
Name
Technical
Type
quality
Description
40%
Criterion 3
Name
Project Management
Type
quality
Description
23%
Criterion 4
Type
price
Description
27%

Items and delivery

Item 1
Id
1
Related Lot
1

Delivery Location

Description
Trawsfynydd Site<br/>Blaenau Ffestiniog<br/>Gwynedd<br/>LL41 6NT

Delivery locations

Entry 1
Region
UKL12
Entry 2
Region
UKL12

Additional Classifications

Entry 1
Id
45262330
Scheme
CPV
Description
Concrete repair work
Entry 2
Id
45111000
Scheme
CPV
Description
Demolition, site preparation and clearance work
Entry 3
Id
45262110
Scheme
CPV
Description
Scaffolding dismantling work
Entry 4
Id
45262120
Scheme
CPV
Description
Scaffolding erection work
Entry 5
Id
45500000
Scheme
CPV
Description
Hire of construction and civil engineering machinery and equipment with operator
Entry 6
Id
45111200
Scheme
CPV
Description
Site preparation and clearance work
Entry 7
Id
45200000
Scheme
CPV
Description
Works for complete or part construction and civil engineering work
Entry 8
Id
45113000
Scheme
CPV
Description
Siteworks
Entry 9
Id
45262660
Scheme
CPV
Description
Asbestos-removal work
Entry 10
Id
45510000
Scheme
CPV
Description
Hire of cranes with operator
Entry 11
Id
45262100
Scheme
CPV
Description
Scaffolding work
Entry 12
Id
45262310
Scheme
CPV
Description
Reinforced-concrete work
Entry 13
Id
45262300
Scheme
CPV
Description
Concrete work
Entry 14
Id
45111300
Scheme
CPV
Description
Dismantling works
Entry 15
Id
45111100
Scheme
CPV
Description
Demolition work
Entry 16
Id
45110000
Scheme
CPV
Description
Building demolition and wrecking work and earthmoving work
Entry 17
Id
45000000
Scheme
CPV
Description
Construction work
Entry 18
Id
45210000
Scheme
CPV
Description
Building construction work

Buyer, suppliers and contacts

Organisation 1
Id
GB-FTS-66893
Name
Magnox Limited

Roles

buyer

Address

Region
UK
Locality
Bristol
Postal Code
BS35 1RQ
Country Name
United Kingdom
Street Address
Oldbury Naite, Oldbury

Details

Classifications

Entry 1
Id
BODY_PUBLIC
Scheme
TED_CA_TYPE
Description
Body governed by public law
Entry 2
Scheme
COFOG
Description
Nuclear Decommissioning

Identifier

Id
2264251
Legal Name
Magnox Limited

Contact

Name
Ruth Cox
Organisation 2
Id
GB-FTS-109710
Name
Nuclear Restoration Services Limited

Roles

buyer

Address

Region
UK
Locality
Warrington
Postal Code
WA3 6GR
Country Name
United Kingdom
Street Address
Hinton House, Birchwood Park Avenue, Risley

Details

Classifications

Entry 1
Id
BODY_PUBLIC
Scheme
TED_CA_TYPE
Description
Body governed by public law
Entry 2
Scheme
COFOG
Description
Nuclear Decommissioning

Identifier

Id
02264251
Legal Name
Nuclear Restoration Services Limited

Contact

Name
Fiona Pearse
Organisation 3
Id
GB-FTS-163220
Name
Costain Limited

Roles

supplier

Address

Region
UK
Locality
London
Postal Code
EC3A 8BE
Country Name
United Kingdom
Street Address
Seventh Floor, 70 St Mary Axe, London, United Kingdom, EC3A 8BE

Details

Scale
large

Identifier

Id
00610201
Legal Name
Costain Limited
Organisation 4
Id
GB-FTS-109712
Name
Nuclear Restoration Services Limited

Roles

reviewBody

Address

Locality
Warrington
Postal Code
WA3 6GR
Country Name
United Kingdom
Street Address
Hinton House, Birchwood Park Avenue, Risley

Details

Identifier

Legal Name
Nuclear Restoration Services Limited

Contact

Organisation 5
Id
GB-FTS-94035
Name
London Court of International Arbitration

Roles

mediationBody

Address

Locality
London
Postal Code
EC4M 7BQ
Country Name
United Kingdom
Street Address
1 Paternoster Lane

Details

Identifier

Legal Name
London Court of International Arbitration

Award information

Award 1
Id
062969-2025-1
Status
active

Suppliers

Supplier 1
Id
GB-FTS-163220
Name
Costain Limited

Related lots

1

Contracts and changes

Entry 1
Id
062969-2025-1
Status
active
Award ID
062969-2025-1
Date Signed
2 Oct 2025, 00:00

Value

Amount
71,813,292
Currency
GBP

Recorded locations

  • Buyer location · Warrington · UK · WA3 6GR · United Kingdom
  • Delivery location · UKL12

Notice and amendment history

1 published notice version reviewed by ProcuraAxis.

1 VERSION
  1. ocds-h6vhtk-0389bb-2025-10-07T15:41:33+01:00compiled ·