Egis-Led ICOSH Consortium Secures Contract Extension for Sizewell C Nuclear Project

Egis, a leading global architecture, consulting, construction engineering, operations and mobility services firm, alongside its consortium partners Amentum, SETEC Nucléaire and Tractebel, has secured a contract extension to support in advancing Sizewell C.

The project involves the planning, design and construction of two European Pressurised Reactors (EPRs) on the east coast of Suffolk. The ICOSH consortium, made up of Egis, Amentum, SETEC Nucléaire, and Tractebel, is entering a new phase that builds on its long-standing involvement with the project. This phase expands their responsibilities to include detailed civil design for 12 nuclear island buildings—including the reactor, fuel, and safeguarding structures—which are considered the most technically challenging and safety-critical parts of any nuclear power plant. The consortium has been supporting Sizewell C since 2020, leveraging expertise from Hinkley Point C to conduct replication studies and geotechnical assessments that form the foundation for the entire development.

Sizewell C will feature two EPRs using replica designs developed during the construction of its sister plant, Hinkley Point C, where ICOSH was also appointed to deliver the civil engineering designs and geotechnical studies.