Sizewell C Ltd

Twin EPR, 3,200 MW, UK nuclear, PPP

GB$51B deal valueest. 2014sizewellc.com (opens sizewellc.com)Checked 11 Oct

The brief

Analyst view
  • UK government largest clean energy project with financial close November 4, 2025.
  • Twin EPR: 3,200 MW supplying 6 million homes for 60+ years.
  • Over 2,000 workers on site January 2026; construction targets mid-to-late 2030s operation.

Technical approach

As reported
EPR Reactors

Twin third-generation pressurised water reactors

Two independent safety systems, passive cooling without active pumps, double containment structure.

Grid integration

Large base-load capacity

3,200 MW supplies 7-8% UK demand as reliable dispatchable power, replacing retiring coal and gas.

Supply chain

UK and international manufacturing

Major components from specialized suppliers globally, transported to Suffolk coast for assembly.

Primer