# Sellafield nuclear site maintenance contracts

> Live situation record from CLSTR: https://clstr.news/situations/sellafield-nuclear-site-maintenance-contracts
> Updated: 2026-09-30T09:04:58.000Z. Sources: 8. Developments: 2.

Sellafield Ltd has initiated a major framework for maintenance, modification, and development at its United Kingdom nuclear site through the Projects and Asset Care Execution (PACE) program. This framework is intended to replace previous engineering and asset maintenance service programs.

Under this framework, multiple partners have been selected for specific roles. OneAxIoM, a joint venture between Amentum and Mitie Plc, was awarded a contract valued at up to £2.1 billion to support plant modification, procurement, and spent fuel management and retrievals. 

Additionally, the German construction group Hochtief, through its subsidiary Hochtief Infrastructure, secured a contract for Lot 2 valued at up to £1.5 billion. This portion focuses on decommissioning activities and specialized nuclear facilities related to special nuclear materials. Both major contracts include an initial nine-year term with a potential six-year extension.

## Claims

- Hochtief has secured a long-term framework contract for the Sellafield nuclear site. (corroborated by 3 sources)
- The contract is valued at up to 1.5 billion British pounds (approximately 1.75 billion euros). (corroborated by 3 sources)
- The contract duration is up to 15 years, consisting of a nine-year base term and a six-year extension option. (corroborated by 2 sources)
- Hochtief Infrastructure will provide services including installation, plant maintenance, and project management. (corroborated by 2 sources)
- The Sellafield site is owned by the UK's Nuclear Decommissioning Authority (NDA). (corroborated by 2 sources)
- No electricity has been produced at the Sellafield site since 2003. (corroborated by 2 sources)

## Timeline

### 2026-09-30: Sellafield Ltd awards major nuclear maintenance contracts

Sellafield Ltd has awarded major contracts under its PACE framework to Amentum/Mitie joint venture and Hochtief for nuclear asset management and decommissioning in the UK.

3 sources. https://clstr.news/cluster/sellafield-ltd-awards-major-nuclear-maintenance-contracts

### 2026-09-30: Hochtief secures £1.5 billion contract for UK's Sellafield nuclear site

Hochtief has secured a contract worth up to 1.5 billion British pounds to provide maintenance and operational services at the Sellafield nuclear site in the UK for up to 15 years.

5 sources. https://clstr.news/cluster/hochtief-secures-15-billion-contract-for-uks-sellafield-nuclear-site

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Cite as: Sellafield nuclear site maintenance contracts. CLSTR, https://clstr.news/situations/sellafield-nuclear-site-maintenance-contracts