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    ContractsDesign and Installation of Alternative Active Effluent Discharge Lines at Hunterston B Nuclear Site
    Awarded contract

    Design and Installation of Alternative Active Effluent Discharge Lines at Hunterston B Nuclear Site

    Awarded
    £9.5m
    Published 5 Nov 2026

    Design and install alternative effluent discharge lines to the sea at Hunterston B Nuclear site following cooling water system decommissioning.

    🇬🇧United KingdomPublished 5 Nov 2026· TodayviaContracts Finder
    Awarded
    £9.5m
    Published 5 Nov 2026

    Decision brief

    4 fields
    • Contract value
      £9,458,845
      Pounds sterling
    • Tender closed
      18 Aug 2026
      2 months ago
    • Sector
      Construction
      Browse related listings
    • Location
      🇬🇧United Kingdom

    Suppliers

    1 supplier
    • CO
      COSTAIN LIMITED
    Lead contractor

    Lifecycle

    Awarded

    Contract awarded. Originally published today.

    5 Nov 202618 Aug 2026

    Brief

    The Cooling Water system at NRS Hunterston B nuclear site is being decommissioned and cooling water pumps will be removed. This contract covers final concept design services and marine installation of alternative active effluent discharge lines (AAEDL) to replace the existing sea discharge point. Work scope includes: end-of-line isolation and backflow protection systems, culvert fixings, pipe fitting, valve repair/replacement/installation, pressure testing, maintenance strategy development, and all required pre-works activities. The contract is for the seaward side installation at the Hunterston B Nuclear site and has been awarded via mini-competition under the NRS Decommissioning and Asbestos Removal (DAR) Framework Lot 1 covering conventional deplanting, asbestos removal, and demolition services.

    Track record

    24 awards · 20 winners
    Open field

    No single supplier dominates the field.

    In construction, NUCLEAR RESTORATION SERVICES has awarded 24 contracts to 20 suppliers.

    Who wins here
    1. AJ Engineering & Construction Services Ltd2× · 8%
    2. Altrad Support Services Limited2× · 8%
    3. Central Roofing and Building Services Limited2× · 8%
    4. Penny Engineering Ltd2× · 8%
    5. AECOM LTD1× · 4%
    6. Igne (T/A Raeburn Drilling & Geotechnical Ltd)1× · 4%

    +14 more suppliers

    Across construction, the most active winners are HOLCIM UK LIMITED, TARMAC TRADING LIMITED, LINDUM GROUP LIMITED — the field to beat, or your route in as a partner.

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    Take action
    View on sourceContracts Finder

    Award notice and full record on the publisher's site

    Publisher
    UK Cabinet Office
    Licence
    OGL v3.0
    Source
    contractsfinder.service.gov.uk
    Record ID
    21f8629d-c739-4679-bc17-65fd0dbaf55e-920742

    Your fit

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    This went to COSTAIN LIMITED. Sonar reads NUCLEAR RESTORATION SERVICES's work like this against your business — who holds it, and whether you could compete or partner next time.

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    Buyer
    NUCLEAR RESTORATION SERVICES
    Sector
    Construction