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    ContractsDesign and Construction Services for Low-Level Waste Repository Vault Optimisation and Capping
    Open tender

    Design and Construction Services for Low-Level Waste Repository Vault Optimisation and Capping

    Contract value
    £318m
    Published 17 Jun 2026

    Nuclear Waste Services seeks a contractor to design and construct vault optimisation and capping systems at the UK's national low-level radioactive waste repository in West Cumbria.

    🇬🇧United Kingdom· EnglandPublished 17 Jun 2026· 2 months agoviaFind a Tender
    Contract value
    £318m
    Published 17 Jun 2026

    Decision brief

    4 fields
    • Contract value
      £318,000,000indicative
      Pounds sterling
    • Closing date
      Rolling
      No closing date published
    • Sector
      Construction
      Browse related listings
    • Location
      🇬🇧United Kingdom
      England

    Lifecycle

    Open

    Open tender — no closing date published. Opened 2 months ago.

    17 June 2026
    Open tender · no closing date published

    Brief

    Nuclear Waste Services (NWS) is seeking an experienced contractor to deliver comprehensive design, engineering, labour, equipment, and materials for vault optimisation and capping works at the Low-Level Waste Repository (LLWR) in West Cumbria. The LLWR is the UK's national disposal facility for low-level radioactive waste from nuclear, medical, and defence industries. This project is part of a long-term programme to protect the environment and public health through closure engineering and additional disposal capacity over the next 15+ years. The contractor must demonstrate proven expertise in large-scale earthworks projects and have the necessary machinery and capabilities to complete work efficiently and on schedule. Key project deliverables include: final protective capping over trenches and vaults; design and construction of Vault 9 extension with retaining walls, leachate management system, and weather protection warehousing; design and construction of interim cap over closed Vault 9 sections; and site clearance. Works encompass excavation, backfill, piling, groundworks, drainage, demolition, aggregates supply, land remediation, and associated engineering and construction activities. Ideal candidates will have substantial experience managing complex radioactive waste facility projects.

    Track record

    1 award · 1 winner
    Thin record

    Only 1 prior award here — too little to read.

    In construction, NUCLEAR WASTE SERVICES has awarded 1 contract to 1 supplier.

    Who wins here
    1. Stobbarts Limited1× · 100%

    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 tender on sourceFind a Tender

    Full notice and submission process on the publisher's site

    Publisher
    UK Cabinet Office
    Licence
    OGL v3.0
    Source
    find-tender.service.gov.uk
    Record ID
    ocds-h6vhtk-055c45
    NW
    Buyer
    NUCLEAR WASTE SERVICES
    Sector
    Construction