AtkinsRéalis 5‑year Sizewell C role: civil and nuclear design notes for engineers
Reviewed by Tom Sullivan
First reported on New Civil Engineer
30 Second Briefing
AtkinsRéalis has secured a five‑year framework to continue as design partner for the civil works on the Sizewell C nuclear power station in Suffolk, extending its role on one of the UK’s largest current nuclear infrastructure schemes. The contract covers detailed civil and structural design for major nuclear island and balance‑of‑plant works, including heavy reinforced concrete structures, deep foundations and complex temporary works. For geotechnical and civil teams, this signals sustained demand for high‑spec nuclear‑grade design, long‑term resourcing and close integration with EDF’s delivery schedule.
Technical Brief
- Five‑year framework duration locks in design resource continuity through multiple Sizewell C construction phases.
- Long horizon allows progressive refinement of constructability, temporary works and sequencing as site data improves.
- Nuclear‑grade civil design implies intensive QA, independent checking and configuration control across the five‑year term.
- Design partner role typically covers design support during construction, responding to RFIs and non‑conformance resolutions.
Our Take
In our infrastructure database, AtkinsRéalis features repeatedly in UK public-sector frameworks, from the Environment Agency’s £1.2bn coastal protection JV to Hampshire’s Gen5 transport consultancy lot, signalling a deliberate strategy to lock in multi‑year pipeline rather than one‑off project wins.
The continuation of AtkinsRéalis’ design role at Sizewell C comes alongside its coastal and flood work for the Environment Agency, which is likely to be relevant given the Suffolk site’s low‑lying coastal setting and long‑term resilience requirements.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
