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Stack Characterisation & Evaluation & DOP Filter Testing Lots 1 & 2 2027 onwards

Nuclear Restoration Services Limited

This public procurement record has 4 releases in its history.

Tender

27 Jul 2026 at 15:31

UK4 - Tender Notice
Planning

21 Jul 2026 at 08:57

UK3 - Planned Procurement Notice
Planning

21 May 2026 at 08:31

UK1 - Pipeline Notice
Planning

18 May 2026 at 14:10

UK2 - Preliminary Market Engagement Notice
Summary of the contracting process

Nuclear Restoration Services Limited is procuring engineering services for stack characterisation and evaluation, together with DOP filter testing, across two lots. The requirement covers NRS sites, including Dounreay and advanced gas-cooled reactor sites transferring to NRS. Lot 1 covers work at Harwell and Winfrith. Lot 2 covers all other NRS sites, including AGRs. The services are associated with the assessment and testing of nuclear-site ventilation or exhaust systems, as described by the procurement title and scope. Delivery is across the United Kingdom, with the buyer based in Warrington. This opportunity is relevant to engineering businesses that provide specialist stack assessment, characterisation, evaluation or DOP filter testing services for nuclear or similarly controlled operational environments.

The process has reached tender: the buyer invited offers through an open procedure. Bids may be submitted electronically in English through the Atamis supplier portal by 18 September 2026 at 12:00. The intended award decision date is 25 January 2027. Both lots are planned to start on 1 April 2027 and run to 31 March 2032, with an optional three-year extension to 31 March 2035. The total estimated value is £2,752,000 excluding VAT, or £3,302,400 including VAT. Lot 1 is valued at £495,000 excluding VAT (£594,000 including VAT); Lot 2 at £2,257,000 excluding VAT (£2,708,400 including VAT). Each lot is scored on technical quality (55%), price (25%), social value (10%) and commercial considerations (10%).

The opportunity suits small and medium-sized enterprises, with both lots identified as suitable for SMEs. Suppliers are likely to be best placed where they can combine engineering expertise in stack characterisation and evaluation with DOP filter testing, and organise reliable delivery across multiple NRS locations. The work will require businesses able to operate in nuclear-site settings, including Dounreay, Harwell, Winfrith and AGR sites, and to manage the technical, commercial and social-value aspects of their offer. The larger second lot may suit providers with wider geographic coverage and greater delivery capacity, while the Harwell and Winfrith lot offers a more focused site-based opportunity. Businesses should be prepared to demonstrate a technically strong, commercially credible service.

How relevant is this notice?

Notice Information

Notice Title

Stack Characterisation & Evaluation & DOP Filter Testing Lots 1 & 2 2027 onwards

Notice Description

Stack Characterisation & Evaluation & DOP Filter Testing Lots 1 & 2 2027 onwards - covers NRS Sites, NRS Dounreay and AGRs transferring to NRS.

Lot Information

Harwell/Winfrith

Lot 1 is to be performed at Harwell/Winfrith

Options: Lot 1 - Harwell/Winfrith Lot 2 - All other NRS sites including AGRs

Renewal: An optional 3 year extension is allowed for within the contract

All other NRS Sites including AGRs

Lot 2 is to be performed at all other NRS sites including AGRs

Options: Lot 1 - Harwell/Winfrith Lot 2 - All other NRS sites including AGRs

Renewal: An optional 3 year extension is allowed for within the contract

Planning Information

To obtain further information, including all documentation, please follow these steps: 1. Log in to the supplier portal at: https://atamis-2464.my.site.com/s/Welcome. 2. Locate the opportunity using 'Find Opportunities' or use ref C31320

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-069b07
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/070875-2026
Current Stage
Tender
All Stages
Planning, Tender

Procurement Classification

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

Common Procurement Vocabulary (CPV)

CPV Divisions

71 - Architectural, construction, engineering and inspection services

CPV Codes

71300000 - Engineering services

Notice Value(s)

Tender Value
£2,752,000 £1M-£10M
Lots Value
£2,752,000 £1M-£10M
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
27 Jul 20261 months ago
Submission Deadline
18 Sep 20261 day to go
Future Notice Date
28 Jul 2026Expired
Award Date
Not specified
Contract Period
1 Apr 2027 - 31 Mar 2032 Over 5 years
Recurrence
2033-04-01

Notice Status

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

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
Nuclear Restoration Services Limited
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
WARRINGTON
Postcode
WA3 6GR
Postcode Area
Warrington
Country
England
Major Region (ITL 1)
TLD North West (England)
Basic Region (ITL 2)
TLD6 Cheshire
Small Region (ITL 3)
TLD61 Warrington
Delivery Location
Not specified
Local Authority
Warrington
Electoral Ward
Birchwood
Westminster Constituency
Warrington North

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

View full OCDS Record for this contracting process

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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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