Wylfa SMR nuclear power plant — United Kingdom

Wylfa SMR nuclear power plant is a 924 MW nuclear power station in Anglesey, United Kingdom. It ranks #56 of 2,860 United Kingdom power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, nuclear supplies about 12.4% of United Kingdom's electricity; the national grid averages 217 gCO₂/kWh (64.4% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id GEM_nuc_wylfasmr_unite.

Data provenance

Source of the capacity and fuel values:

capacity: GEM Global Nuclear Power Tracker September 2025 unit-status sum (cancelled); fuel: GEM GNPT

In context: how this plant compares

At 924 MW, Wylfa SMR nuclear power plant is around the median nuclear plant in United Kingdom (965 MW). Technically it is described as small modular reactor. Its current lifecycle status is “Cancelled” — so it is not yet, or no longer, generating at full output. Nuclear plants split uranium to raise steam with no direct CO₂; they run as steady baseload with very high capacity factors and the longest operating lifetimes of any thermal plant.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

How it compares & nearby plants

The #16 largest nuclear power plant of 25 in United Kingdom by capacity.

United Kingdom has 25 nuclear power plants in this dataset, together about 27,683 MW of capacity.

Nearby power plants

• Wylfa Newydd nuclear power plant · Nuclear · 2,760 MW · Anglesey
• Wylfa nuclear power plant · Nuclear · 1,070 MW ·
• Ystgellog Farm Wind Farm · Wind · 4.6 MW · Wales
• Llanbabo Wind Farm · Wind · 20.4 MW · Wales
• Llyn Alaw · Wind · 20.4 MW · Wales
• Trysglwyn · Wind · 5.6 MW · Wales

Location

Coordinates 53.4116929, -4.4844117 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions