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PROCUREMENT OPPORTUNITY

Extra High Voltage (EHV) switchgear, transformers and electrical protection inspection and Maintenance

Nuclear Restoration Services Limited · compiled

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

Opportunity overview

The provision of emergency call-out services, routine inspection and maintenance of Obsolete and aged (50+ years) Extra High Voltage (EHV) switchgear, transformers and electrical protection only (and not replacement of the same) at Dungeness A, Maentwrog, Trawsfynydd, Wylfa and potentially Hinkley point B.

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.

National Grid Electricity Transmission

Matched by normalised name
Published award value
Value not stated
Awarded
Not supplied
Contract signed
11 Feb 2025
Award ID
004809-2025-1
Status
active
Identifier
2366977
Location
London, UK, WC2N 5EH, United Kingdom

Classification

  • CPV50532400 — Repair and maintenance services of electrical distribution equipment

Lots

  • The provision of emergency call-out services, routine inspection and maintenance of Obsolete and aged (50+ years) Extra High Voltage (EHV) switchgear, transformers and electrical protection only at Dungeness A, Maentwrog, Trawsfynydd, Wylfa and potentially Hinkley point B.<br/><br/>The expertise and experience requirements for each site are as follows:<br/><br/>Dungeness A, Trawsfynydd & Wylfa<br/><br/>Maintenance of 275 kV and 132 kV Air Blast Circuit Breakers including ability to source, refurbish, remanufacture or replace existing components / equipment. A particular requirement is knowledge and experience of 275 kV Reyrolle OBR60 Air Blast Circuit Breakers.<br/>Maintenance of 275 kV / 11 kV and 132 kV / 11 kV oil filled transformers with in-tank or externally mounted on-load tap-changers.<br/><br/>Maintenance and testing of transformer differential protection systems.<br/><br/>Working under NGET Safety Rules.<br/><br/>Note: The equipment at Wylfa is planned to be decommissioned in 2026 so minimal work is expected to be carried out at Wylfa beyond March 2026.<br/><br/>Due to the agedness and obsolescence of the equipment NRS are currently exploring options to enable the decommissioning of equipment at Trawsfynydd & Wylfa in favour of moving to Distribution Network Operators (DNO’s) during the life of the proposed contract (full replacement of existing and commissioning of new equipment is not a requirement that will be covered by this contract).<br/><br/>Maentwrog<br/><br/>Maintenance of 33 kV SF6 insulated switchgear.<br/>Maintenance of 33 kV / 11 kV generator transformers.<br/>Maintenance and testing of transformer differential protection systems and generator protection systems.<br/><br/>Working under Scottish Power MANWEB Safety Rules.<br/><br/>Hinkley point B<br/><br/>During the life of this contract the responsibility for managing and decommissioning Hinkley point B power station will pass from EDF to NRS and it is possible that similar services may be required at these locations.<br/><br/>However, it is not currently known what arrangements are in place or if existing contractual arrangements will extend beyond the handover dates and therefore require novating to NRS.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
C5823
Status
complete
Procurement Method
limited
Main Procurement Category
services
Procurement Method Details
Award procedure without prior publication of a call for competition
Why this procedure was chosen
NRS consider competition is absent for technical reasons as no reasonable alternative or substitute exists for the following reasons:<br/><br/>The equipment is aged (circa 50-60 years old) and National Grid Electricity Generation (NGET) hold a significant amount of experience and knowledge through their dedicated in-house historic asset specialists with regards to maintenance of the equipment which also includes inspection and maintenance logs. <br/><br/>NRS consider that this knowledge and capability built up over many years maintaining this equipment is invaluable to the safe and effective maintenance and execution of the work and that it is unlikely that another provider would possess or be able to acquire the level of expertise required to maintain the type and age of the equipment mentioned. <br/><br/>NRS also do not consider it is possible that another supplier would embark on an extensive training program for a requirement of this size, frequency, age or duration (noting that NRS are also exploring options to decommission the equipment and further reduce the level of work required).<br/><br/>NGET are also authors and owners of the current inspection and maintenance regimes which were based on the Original Equipment Manufacturers (OEM) specifications written circa 50-60 years ago. However, over the years NGET have amended these to reflect the operational learning based on experience and development of best practice routines during execution of the work. NRS do not hold copies of these regimes and they will not be made available to a new supplier by NGET therefore any new supplier will need to develop a new regime based on the OEM specification. <br/><br/>NRS copies of the OEM specifications are incomplete with many OEM’s either no longer trading or having been taken over so it may not be possible to obtain new copies. Any new inspection and maintenance regime would require NRS approval, however NRS feel there is limited inhouse knowledge on this equipment to do this.<br/><br/>NGET hold, have access to, and have the expertise to refurbish critical obsolete spares which NRS believe other economic operators would find difficult and cost prohibitive to replicate.<br/><br/>The equipment is housed at locations where NRS are not the leaseholder, and any other commercial operators will need to engage with NGET and Scottish Power MANWEB to gain access to Sub-stations and then require full supervision during visits for emergency call-out services, routine inspection and maintenance. NRS have been informed that any work would need to be carried out under NGET and Scottish Power MANWEB Safety Rules respectively which will lead to additional third-party cost, delays and significant sub-station access/escorting issues with regards to coordination of the additional contractors engaged in delivering the work.

Covered By

GPA

Legal basis

Id
32014L0025
Scheme
CELEX

Communication

Future Notice Date
5 Dec 2022, 00:00

Classification

Id
50532400
Scheme
CPV
Description
Repair and maintenance services of electrical distribution equipment

Procedure reasons

Entry 1
Id
D_OUTSIDE_SCOPE
Scheme
TED_PT_AWARD_CONTRACT_WITHOUT_CALL
Description
The procurement falls outside the scope of application of the directive

Lots and requirements

Entry 1
Id
1
Status
planned
Has Options
No
Description
The provision of emergency call-out services, routine inspection and maintenance of Obsolete and aged (50+ years) Extra High Voltage (EHV) switchgear, transformers and electrical protection only at Dungeness A, Maentwrog, Trawsfynydd, Wylfa and potentially Hinkley point B.<br/><br/>The expertise and experience requirements for each site are as follows:<br/><br/>Dungeness A, Trawsfynydd & Wylfa<br/><br/>Maintenance of 275 kV and 132 kV Air Blast Circuit Breakers including ability to source, refurbish, remanufacture or replace existing components / equipment. A particular requirement is knowledge and experience of 275 kV Reyrolle OBR60 Air Blast Circuit Breakers.<br/>Maintenance of 275 kV / 11 kV and 132 kV / 11 kV oil filled transformers with in-tank or externally mounted on-load tap-changers.<br/><br/>Maintenance and testing of transformer differential protection systems.<br/><br/>Working under NGET Safety Rules.<br/><br/>Note: The equipment at Wylfa is planned to be decommissioned in 2026 so minimal work is expected to be carried out at Wylfa beyond March 2026.<br/><br/>Due to the agedness and obsolescence of the equipment NRS are currently exploring options to enable the decommissioning of equipment at Trawsfynydd & Wylfa in favour of moving to Distribution Network Operators (DNO’s) during the life of the proposed contract (full replacement of existing and commissioning of new equipment is not a requirement that will be covered by this contract).<br/><br/>Maentwrog<br/><br/>Maintenance of 33 kV SF6 insulated switchgear.<br/>Maintenance of 33 kV / 11 kV generator transformers.<br/>Maintenance and testing of transformer differential protection systems and generator protection systems.<br/><br/>Working under Scottish Power MANWEB Safety Rules.<br/><br/>Hinkley point B<br/><br/>During the life of this contract the responsibility for managing and decommissioning Hinkley point B power station will pass from EDF to NRS and it is possible that similar services may be required at these locations.<br/><br/>However, it is not currently known what arrangements are in place or if existing contractual arrangements will extend beyond the handover dates and therefore require novating to NRS.

Award criteria

Criteria

Criterion 1
Type
price

Items and delivery

Item 1
Id
1
Related Lot
1

Delivery Location

Description
Dungeness A, Maentwrog, Trawsfynydd, Wylfa and potentially Hinkley point B.

Delivery locations

Entry 1
Region
UK
Entry 2
Region
UK

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
Decommissioning

Identifier

Id
2264251
Legal Name
Magnox Limited

Contact

Name
Edward Andrew Dobson
Telephone
+44 7517499325
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
Scheme
TED_CE_ACTIVITY
Description
Nuclear Decommissioning

Identifier

Id
02264251
Legal Name
Nuclear Restoration Services Limited

Contact

Name
Andrew Dobson
Organisation 3
Id
GB-FTS-137747
Name
National Grid Electricity Transmission

Roles

supplier

Address

Region
UK
Locality
London
Postal Code
WC2N 5EH
Country Name
United Kingdom
Street Address
1-3 Strand

Details

Scale
large

Identifier

Id
2366977
Legal Name
National Grid Electricity Transmission
Organisation 4
Id
GB-FTS-94035
Name
London Court of International Arbitration

Roles

reviewBody
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
Organisation 5
Id
GB-FTS-109712
Name
Nuclear Restoration Services Limited

Roles

reviewContactPoint

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

Award information

Award 1
Id
004809-2025-1
Status
active

Suppliers

Supplier 1
Id
GB-FTS-137747
Name
National Grid Electricity Transmission

Related lots

1

Contracts and changes

Entry 1
Id
004809-2025-1
Status
active
Award ID
004809-2025-1
Date Signed
11 Feb 2025, 00:00

Recorded locations

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

Notice and amendment history

1 published notice version reviewed by ProcuraAxis.

1 VERSION
  1. ocds-h6vhtk-037ce4-2025-02-12T16:45:48Zcompiled ·