Sellafield Ltd is responsible for safely operating and decommissioning Europe's largest, most complex nuclear site, which is home to legacy nuclear facilities that are some of the most hazardous buildings in Western Europe. There is a continued need for Sellafield to have access to a specialist Industrial Services and Access Supply Chain through a Framework Agreement to replace the existing Sellafield Industrial Services Framework (SIS).

The main services to be delivered by the ASI Framework are divided into two separate discreet packages of work:

- Access Services: The design, manufacture, insulation, and deployment of access systems including scaffolding, powered access systems, roped access, rigging, cranes and any other systems of providing Sellafield Ltd staff and contractors access to various locations at each of their facilities.
- Asbestos & Insulation Services: Removal and replacement of thermal insulation including asbestos containing materials (ACM) and lagging. Methods employed vary and will include traditional removal methods and complete ACM coated component removal.

Demand is expected in the near to medium term, to remain at around £18m-£20m per annum with allowances built into the Framework for possible increase in throughput, though no spending commitment is made to the supply chain. The Framework Agreement will be a single lot agreement for 4 years and an estimated value of between £73m-£95m.

NEC4 form of contracts will be utilised, employing the Engineering and Construction Contract (ECC) and Term Service Contract (TSC). The main pricing options (A, C or E) will be available to Sellafield Ltd depending upon scope, risk & complexity. The use of Option E contracts will be challenged to encourage greater use of C so that reward and risk is shared.

Sellafield has identified 5 Critical Success Factors (CSFs) in collaboration with its internal stakeholders as being integral to the successful performance of the Framework opportunity. The CSFs reflect the key lessons from the current SIS framework and alignment to the Nuclear Decommissioning Authority (NDA_ Value Framework and Delivery Model.
CSF 1: Safety, Security & Resilience
CSF 2: Capability & Capacity
CSF 3: Social Value & Sustainability
CSF 4: Collaboration & Integration
CSF 5: Delivery