Nuclear power
How much of Great Britain's electricity is coming from nuclear now, and the stations that produce it.
Nuclear now
Nuclear generation now
–
Live data unavailable
Share of generation
–
Same snapshot, named sources
Operating stations
5
9 reactors, all run by EDF
Combined capacity
about 6 GW
Approximate net, when all are running
National nuclear output from Elexon's generation feed. It is one total for Great Britain, not a reading from each station.
Nuclear output today
Half-hourly averages of the national figure.
Operating stations
Each unit's current status on EDF's site → (updated on weekdays)
Refuelling and outages
Nuclear stations run steadily rather than following demand, so the national figure usually changes in steps: when a reactor is taken offline for refuelling, inspection or repair, and when it returns. The four AGR stations each have two reactors, so one can be offline while the other runs; Sizewell B has a single reactor feeding two turbines.
Why we don't show each station's output
The live figure above is Elexon's national total. Metered output for each generating unit is published days later, after settlement, and forecasts of available capacity are not the same as output. Rather than mix those, or guess that a station is offline because a reading is missing, we link to EDF's own status page.
New nuclear
Hinkley Point C
Two EPR reactors in Somerset, about 3.2 GW, built by EDF.
Under construction. EDF expects the first unit to start generating around the end of this decade; dates have moved before.
Official page →Sizewell C
Two EPR reactors next to Sizewell B in Suffolk, about 3.2 GW.
Final investment decision taken in July 2025; construction under way.
Official page →Small modular reactors
Great British Energy – Nuclear chose Rolls-Royce SMR in June 2025, with Wylfa on Anglesey named as the first site.
In development; no reactor is yet under construction.
Official page →
Dates for new reactors and station closures are the operators' expectations and can change. Nuclear is low-carbon over its lifetime, including construction and fuel.
Related
Live generation →Every source powering Great Britain now.Offshore wind →Projects operating, under construction and planned.How the grid works →Who balances the system and how power reaches homes.Sources
- Live and today's output: Elexon BMRS FUELINST, as on the live dashboard.
- Stations: EDF nuclear power stations, EDF daily statuses, and EDF's July 2026 life extensions.