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J5 Super Grid Transformer Refurbishment

United Kingdom Atomic Energy Authority

This public procurement record has 2 releases in its history.

Tender

07 Oct 2026 at 17:07

UK4 - Tender Notice
Planning

13 Aug 2026 at 14:01

UK2 - Preliminary Market Engagement Notice
Summary of the contracting process

The UK Atomic Energy Authority is seeking refurbishment of three super grid transformers at its Culham Campus in Oxfordshire. The work forms part of an asset life extension programme for the transformers and is classified as works. The requirement covers transformer repair and maintenance, refurbishment, and associated mechanical and electrical engineering services. The delivery location is Culham Campus. This is a specialist electrical infrastructure project focused on extending the service life of existing high-voltage grid equipment, rather than supplying new transformers.

The buyer invited offers through an open competition. The tender was published with one lot, and the buyer set both the enquiry deadline and the bid submission deadline as 5 November 2026 at 12:30. The contract period is scheduled to run from 2 December 2026 to 31 May 2027. The estimated value is £2,000,000 excluding VAT (£2,400,000 including VAT). The award criteria are those set out in the Invitation to Tender documentation. The procurement is below the relevant threshold, and electronic submission is allowed. The lot is identified as suitable for small and medium-sized enterprises.

The opportunity suits contractors experienced in refurbishing super grid transformers and delivering electrical and mechanical engineering work on operational energy infrastructure. Suppliers will need the technical capability to assess, repair and refurbish three transformers, and to plan and carry out work within the asset life extension programme. The scale and specialist nature of the assignment are likely to favour businesses with suitable engineering teams, equipment and project management capacity for complex transformer refurbishment. The buyer identifies the lot as suitable for small and medium-sized enterprises, making it relevant to capable specialist firms as well as larger engineering contractors. The work is located at the UK Atomic Energy Authority’s Culham Campus in Oxfordshire.

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Notice Information

Notice Title

J5 Super Grid Transformer Refurbishment

Notice Description

Provision of the refurbishment of three super grid transformers on the Culham Campus, as part of an Asset Life Extension Programme to the SGTs.

Planning Information

https://uk.eu-supply.com/app/rfq/rwlentrance_s.asp?PID=108182&TID=100113249&B=

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-06e3ab
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/094949-2026
Current Stage
Tender
All Stages
Planning, Tender

Procurement Classification

Notice Type
UK4 - Tender Notice
Procurement Type
Standard
Procurement Category
Works
Procurement Method
Open
Procurement Method Details
Below threshold - open competition
Tender Suitability
SME
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

45 - Construction work

50 - Repair and maintenance services

71 - Architectural, construction, engineering and inspection services

CPV Codes

45453100 - Refurbishment work

50532200 - Repair and maintenance services of transformers

71334000 - Mechanical and electrical engineering services

Notice Value(s)

Tender Value
£2,000,000 £1M-£10M
Lots Value
£2,000,000 £1M-£10M
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
7 Oct 20265 days ago
Submission Deadline
5 Nov 20264 weeks to go
Future Notice Date
4 Sep 2026Expired
Award Date
Not specified
Contract Period
2 Dec 2026 - 31 May 2027 6-12 months
Recurrence
Not specified

Notice Status

Tender Status
Active
Lots Status
Active
Awards Status
Not Specified
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
United Kingdom Atomic Energy Authority
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
OXFORDSHIRE
Postcode
OX14 3DB
Postcode Area
Oxford
Country
England
Major Region (ITL 1)
TLJ South East (England)
Basic Region (ITL 2)
TLJ1 Berkshire, Buckinghamshire and Oxfordshire
Small Region (ITL 3)
TLJ14 Oxfordshire CC
Delivery Location
Not specified
Local Authority
South Oxfordshire
Electoral Ward
Sandford & the Wittenhams
Westminster Constituency
Didcot and Wantage

Further Information

Notice Documents

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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