Sellafield Ltd., a nuclear waste and decommissioning site, has put out a tender pre-notification for a data center manager and hosted infrastructure service in the UK.

In a "Preliminary Market Engagement Notice," Sellafield has detailed potential contracts valued at £107.69 million ($145.64m) that could be on offer as soon as early 2026.

The contract will be split into two lots. Applicants can only win one of the two.

The first lot is for hosted infrastructure management services, with a value of £48.23m ($65m) excluding VAT. This will include supporting all on-premises servers and private cloud infrastructure, as well as the support of five data centers, including the Sellafield Main site (x3), Risley in Warrington, and Crown Hosting in Corsham. It will also cover IaaS and PaaS management, among others.

The second lot, covering ICT application management services, including application support, managing the on-premises application portfolio, 118 applications, including SAP and applications within Sellafield's Microsoft Azure environment.

The notice said that, within the contract period, which will span at least April 2027 to April 2032, Sellafield will "modernize and simplify" its IT infrastructure to reduce technical debt and consolidate its data centers from five to three. Additionally, they are expecting a "gradual reduction in on-premises infrastructure" through this rationalization, and as the company "further exploit[s] cloud technologies."

The contract has the possibility of being extended by an additional two years, to 2034.

Sellafield, formerly known as Windscale, is a multifunction nuclear site near Seascale on the coast of Cumbria in the UK. The site was previously used for nuclear power generation and fuel reprocessing, but today it is primarily used for waste processing, storage, and decommissioning.

In 1957, a major nuclear incident known as the "Windscale fire" took place at the site. Uranium metal fuel caught fire inside the Windscale Pile no.1, releasing radioactive contamination into the environment. The incident is estimated to have caused 240 cases of cancer, 100 of those being fatal.

As stated in the engagement notice, Sellafield is a customer of Crown Hosting. Crown Hosting is a joint venture between Ark Data Centres and the Cabinet Office, and provides colocation services to public sector bodies and government departments.

Reports emerged this month that Ark's owner, Elliott Investment, was looking to sell its stake in the company for as much as £3bn ($4bn).