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At a glance

Client/project partners: EDF NNB Ltd

Status: Live

Location: Somerset

Crown House Technologies (CHt) is delivering the mechanical and electrical services for this seven-storey multi-use facility comprising staff changing / decontamination / maintenance / storage areas, laboratories and general office space.

The OSC is situated on the Conventional Island between the two turbine halls and will be linked to the adjacent buildings by two new sky bridges. Construction will be carried out and inspected to demonstrate compliance with NNB’s extensive nuclear safety requirements.

Complex engineering

CHt is providing MEP input into the Stage 4B design, including technical input, design management, DE assistance, DfMA input/proposals and procurement assistance and advice to add value and provide cost surety at an early stage.

Our approach

Working collaboratively with the BYLOR and Atkins teams, CHt has been able to embed Group technical standards, integrating our DfMA approach, procurement model and DE philosophy within the design at an early stage.

This approach has allowed CHt to embed standard material selections within the services design while also allowing early coordination of items such as modular riser fixings with rebar designs in advance to ensure any clashes can be designed out.

Socio-economic benefits

CHt and other Hinkley Point C Contractors are working hard to make sure the project benefits people in the south west and beyond, from increasing local employment, to the development of a sustainable regional supply chain and the advancement of new training facilities and qualifications.

Key statistics


EPR reactors will offset 9 million tonnes of CO2 emissions a year, equivalent to almost 600 million tonnes over its 60-year lifecycle


decentralised battery systems


vertical modules


Horizontal modules


individual services