What is Sizewell C?

The proposed Sizewell C site is on the Suffolk coast, alongside an operating nuclear power station and one being decommissioned. Should we receive the necessary consents it will be the second of a new generation of nuclear stations using the EPR technology to be built in the UK, following on from Hinkley Point C which is now under construction in Somerset.

It would include two reactors (known as the UK EPR) and be capable of generating 3,260MW of low carbon electricity, enough to power around six million homes.

The case for building Sizewell C is strong and the development of the station is necessary for the UK’s energy future:

  • Sizewell C would replicate the design of Hinkley Point C
  • Sizewell C would be cost competitive with other low-carbon technologies
  • With four EPR reactors expected to be in operation by the time Sizewell C reaches its final investment decision, technology risk, and hence the cost of finance, will be reduced significantly
  • The cost of building Sizewell C would be reduced by replicating and learning from Hinkley Point C, and benefiting from a mature UK supply chain
  • There would be a high percentage of UK companies in the Sizewell C supply chain – much higher than other low carbon technologies
  • Sizewell C would create huge economic opportunities in the East of England, providing highly skilled and well paid employment and contracts for local businesses
  • Sizewell C would have very low grid connection costs, thanks to existing grid infrastructure already being in place


Find out more about our proposals

The reactor

Sizewell C will have two UK EPR reactor units, the same technology as Hinkley Point C.

The UK EPR was the first new power station reactor to successfully complete a thorough examination process in the UK, known as the Generic Design Assessment (GDA), by the UK’s independent nuclear regulators – the Office for Nuclear Regulation (ONR) and the Environment Agency.

850,000 hours

of engineering studies were part of the rigorous four-year design approval process

17% less

The EPR's large core means it uses 17% less uranium than older technology


separate safety systems in the EPR protect against all hazards, including earthquakes and flooding

Project timeline

  1. Statement of community consultation

  2. Stage 1 consultation

  3. Updated statement of community consultation

  4. Stage 2 consultation

  5. Stage 2 formal feedback

  6. Stage 3 consultation (CURRENT STAGE)

  7. Application submission

  8. Decision

  9. Construction

  10. Operation

Contact us

You can contact the Sizewell C project team by any of the following methods:

Call us on FREEPHONE 0800 197 6102 (Open 9.30am - 5.00pm on weekdays and 9am - 12pm on Saturdays)

Write to us at FREEPOST SZC CONSULTATION (no stamp or further address required).

Visit us at the Sizewell C Information Office, 48-50 High Street, Leiston IP16 4EW.

Email us at info@sizewellc.co.uk

For media enquiries, email media@edfenergy.com.