Costain, the infrastructure solutions company, has been selected by Sellafield for a significant role on its long-term Infrastructure Delivery Partnership (IDP).
The total value of Sellafield’s IDP is worth up to £2.9bn, split into three lots. Costain has been confirmed as Utilities Delivery Partner (Lot 3), worth up to £1bn to the company. The contract consists of an initial term of nine years with an option to extend by a further six years, either in a single extension or multiple smaller extensions.
As Utilities Delivery Partner, Costain’s role will include the completion of detailed design and all procurement, installation, construction, commissioning and handover activities that form part of the contract delivery.
Costain’s responsibilities will involve refurbishing and replacing a variety of on-site and off-site utility distribution systems and services, including steam, water supply, water treatment, compressed gas and other essential utilities serving Sellafield.
Alex Vaughan, chief executive officer of Costain, commented: “This long-term award further demonstrates our integral position in the UK’s civil nuclear energy market. The Government is clear that the safe and responsible decommissioning of the UK’s nuclear legacy is a critical part of creating a sustainable future and delivering local and national economic prosperity. As one of Sellafield’s trusted partners we will deliver safe, high-quality utilities upgrades in a complex working environment.”
James Riddick, Sellafield Ltd chief supply chain officer, said: “Our job at Sellafield is to create a clean and safe environment for future generations. That means safely, securely, and cost effectively dealing with the legacy of historic operations on our site. To deliver this we need robust and reliable infrastructure to support our nuclear decommissioning and waste management activities.
“IDP is a long-term strategic partnership designed to provide that support while unlocking investment and opportunities for our local community and delivering sustainable value for money to the taxpayer. We’re excited to welcome our new partners, and we look forward to working together to progress our mission while creating transformational and enduring social value.”
The contract award builds on Costain’s decades of experience delivering infrastructure solutions in the highly regulated nuclear energy sector. Costain has worked with Sellafield since 2005, including on the Evaporator D project and as part of the Decommissioning Delivery Partnership.



