The Sellafield nuclear site is located on the coast of Cumbria in west England. It is one of the most complex and historically significant nuclear facilities in the world. Originally established in the 1940s for the UK’s atomic energy program, Sellafield has also evolved into the country’s central hub for nuclear decommissioning, waste management, and fuel reprocessing. The west Cumbria nuclear site is managed by Sellafield Ltd under the Nuclear Decommissioning Authority (NDA). Additionally, the site spans more than 6 square kilometers and employs around 11,000 people. Today, its focus lies indismantling legacy facilities, managing radioactive waste, and supporting efforts to ensure the UK’s long-term energy security.
Most recently, Sellafield Ltd also awarded contracts to HOCHTIEF, Costain, and Morgan Sindall at a value of 2.9 billion euros. These are to support operations and decommissioning at Sellafield’s nuclear site in west Cumbria.

Reported November 11, 2021 – Sellafield Ltd has awarded the remaining term of the Infrastructure Strategic Alliance (ISA) to Morgan Sindall Infrastructure and Arup. The ISA is composed of Sellafield Ltd, Morgan Sindall Infrastructure and Arup. It offers program of infrastructure schemes for Sellafield LTD’s aging asset portfolio.
The Infrastructure Strategic Alliance is also part of a number of long-term strategic supply agreements placed to the Sellafield Ltd acquisition strategy. It is in-charge of a £1.1 billion contract for essential infrastructure assets to Sellafield’s west Cumbria nuclear site. This was awarded in 2012. Through the previous nine years, the contract has also played an important role in supporting Sellafield’s goals. It also catered for socio-economic welfare across Cumbria.
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Key Quotes on the West Cumbria Nuclear Site Contracts
“Securing the term and extension to the Infrastructure Strategic Alliance contract, is another amazing opportunity for us”, said Morgan Sindall’s MD, Simon Smith. “Alongside the duty on the partnership of Program and Project Partners, we will also work with local organizations and the community. This will help develop sustainable local economic growth. It will also create greater opportunities for the coming generations as part of the commitment to being a caring business.”
Jim Johnson, Arup’s digital leader for UK, India, Africa and Middle East, also added. “We are committed to conserving a positive presence wherever we work. And as such, we look forward to continuing to play a significant role in supporting the local economy in the coming years.”
The Infrastructure Strategic Alliance work is primarily set for utility assets like electricity, water supply and compressed air. Civil infrastructure, bulk chemical storage and distribution are also covered. West Cumbria’s nuclear site drainage network, roads, car parks and general buildings also fall under it. Also included are some non-utility assets like analytical services facilities, flask maintenance plant, transport systems and emergency management systems.