Sizewell C nuclear power station
| Sizewell C nuclear power station (SZC) | |
|---|---|
3D Image of how Sizewell C (middle) will appear in relation to Sizewell B (top right) | |
| Country | England |
| Location | Suffolk |
| Coordinates | 52°13′09″N 1°37′13″E / 52.2193°N 1.6203°E |
| Status | Preliminary works underway |
| Construction began | 2023 (site preparation) |
| Construction cost | £38 billion |
| Owners | UK Government (44.9%) La Caisse (20%) Centrica (15%), EDF (12.5%) Amber Infrastructure (7.6%) |
| Operator | NNB Generation Company |
| Nuclear power station | |
| Reactor type | PWR |
| Reactor supplier | Framatome |
| Cooling source | Sea water from North Sea |
| Thermal capacity | 2 × 4,524 MWth (planned) |
| Power generation | |
| Make and model | EPR |
| Units planned | 2 × 1,630 MWe |
| Nameplate capacity | 3,260 MWe (planned) |
| External links | |
| Website | www |
| Commons | Related media on Commons |
The Sizewell C nuclear power station is a project to construct a 3,200 MWe nuclear power station with two EPR reactors near the village of Sizewell in Suffolk, England. The project was proposed by a consortium of EDF Energy and China General Nuclear Power Group, who at the time owned 80% and 20% of the project respectively.
In 2022, the UK Government announced a buy-out to allow for the exit of CGN from the project and forming a 50% stake with EDF, though EDF expected this to fall below 20% following anticipated external investment. The final investment decision was made on 22 July 2025, with the UK government taking an initial shareholding of 44.9% (specifically the Secretary of State for Energy Security and Net Zero), with the remainder consisting of La Caisse, Centrica, EDF, and Amber Infrastructure. The power station is expected to meet up to 7% of the UK's electricity demand.
The project commenced in 2024, with construction taking between nine and twelve years, depending on developments at the Hinkley Point C nuclear power station, which is also being developed by EDF Energy and which shares major similarities with the Sizewell plant. The reactors are expected to have a service lifetime of 60 years.
On 10 June 2025, the government announced that Sizewell C had been allocated government capital investment of £14.2 billion. As of July 2025, construction is estimated to cost £38 billion, equivalent to £11,600 per kW net electric capacity.