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UKRI-6064 ISP-1157 Replacement of Large ISIS Power Supply System

UK RESEARCH & INNOVATION

This public procurement record has 2 releases in its history.

Tender

10 Sep 2026 at 15:09

UK4 - Tender Notice
Planning

16 Jun 2026 at 13:44

UK2 - Preliminary Market Engagement Notice
Summary of the contracting process

UK Research & Innovation (UKRI), through its Science and Technology Facilities Council, is procuring a replacement large magnet power supply system for the ISIS Neutron and Muon Source Facility. The requirement is for a modular 1,200 kVA three-phase alternating-current voltage source, with a control system that regulates the designated magnet load current to a stable setpoint. The facility will provide a DCCT measurement signal of -10/+10 V representing the load-circuit current. The system must provide variable three-phase output from 0 V to 250 V line-neutral, with output voltage accuracy of ±50 mV, using a nominal 400 Vrms, 50 Hz three-phase supply. This is a goods procurement for electricity supply equipment, delivered for use at the ISIS facility.

The procurement reached tender: UKRI invited offers through an open procedure. Enquiries had to be submitted by 9 November 2026 at 14:00, and tenders by 23 November 2026 at 14:00. The planned award decision date was 22 January 2027. The contract is scheduled to run from 12 March 2027 to 12 February 2029. Its estimated value is £3,000,000 excluding VAT, or £3,600,000 including VAT. There is one lot. Evaluation is based on technical and quality criteria weighted at 70% and price weighted at 30%. Suppliers submit electronically through UKRI’s Atamis eSourcing platform, in English, after registering an interest and accessing the tender documents there.

This opportunity suits electrical power-system manufacturers, integrators and specialist engineering firms able to design, supply and support high-power three-phase AC magnet power equipment. Bidders need capability in closed-loop control of a magnet load using an externally provided DCCT signal, rather than simply regulating the power supply output current. The required system must deliver precise variable voltage, high stability and ±50 mV output accuracy, while operating from a 400 Vrms, 50 Hz three-phase input. Relevant strengths include modular power-conversion design, control-system engineering, commissioning and maintainability of critical scientific or industrial equipment. The specification also calls for intrinsic safety by design, high efficiency, high reliability and compliance with, and marking to, relevant standards. The single lot is identified as suitable for SMEs.

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Notice Information

Notice Title

UKRI-6064 ISP-1157 Replacement of Large ISIS Power Supply System

Notice Description

The ISIS Neutron and Muon Source Facility, part of UKRI's Science and Technology Facilities Council, are looking to procure a replacement three-phase Alternating Current (AC) Magnet Power Supply System to make up the losses in a resonant magnet circuit. The requirement is for a modular 1200 kVA three-phase AC voltage source power supply that includes a control system capable of regulating the designated magnet load current to a given setpoint and to a high level of stability. It is important to emphasise that the magnet load current to be regulated is not the same as the AC power supply output current and the measurement signal for the load current will be provided by the facility in the form of a DCCT with a -10/+10 V signal representative of the load circuit current. The three-phase output shall have a variable voltage output from 0 V to 250 V line-neutral and an output voltage accuracy of +-50 mV. The system shall be fed from a nominal 400 Vrms AC, 3-phase 50 Hz sinusoidal supply, intrinsically safe by design, with high efficiency, high reliability, high maintainability and fully compliant and marked with relevant standards.

Planning Information

UKRI will be holding a virtual Market Engagement Event on Thursday 9 July 2026 at 13:30 BST, providing an overview of the requirement. There will be an opportunity for suppliers to ask questions. If you are interested in attending, please email the below details to STFCprocurement@ukri.org, quoting the UKRI reference number (UKRI-6064) by Monday 6th July 2026. Company name: Attendee name: Email address:

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-06b5f2
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/085988-2026
Current Stage
Tender
All Stages
Planning, Tender

Procurement Classification

Notice Type
UK4 - Tender Notice
Procurement Type
Standard
Procurement Category
Goods
Procurement Method
Open
Procurement Method Details
Open procedure
Tender Suitability
SME
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

31 - Electrical machinery, apparatus, equipment and consumables; lighting

CPV Codes

31682000 - Electricity supplies

Notice Value(s)

Tender Value
£3,000,000 £1M-£10M
Lots Value
£3,000,000 £1M-£10M
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
10 Sep 20261 months ago
Submission Deadline
23 Nov 20264 weeks to go
Future Notice Date
31 Jul 2026Expired
Award Date
Not specified
Contract Period
12 Mar 2027 - 12 Feb 2029 1-2 years
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
UK RESEARCH & INNOVATION
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
SWINDON, WILTSHIRE
Postcode
SN2 1FL
Postcode Area
Swindon
Country
England
Major Region (ITL 1)
TLK South West (England)
Basic Region (ITL 2)
TLK7 Gloucestershire and Wiltshire
Small Region (ITL 3)
TLK71 Swindon
Delivery Location
TLJ14 Oxfordshire CC
Local Authority
Swindon
Electoral Ward
Rodbourne Cheney
Westminster Constituency
Swindon North

Further Information

Notice Documents

Notice URLs

Open Contracting Data Standard (OCDS)

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