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Heysham 2

Nuclear power plant in England, United Kingdom. Approximate location 54.0285, -2.916.

NuclearEnglandUnited Kingdom

Heysham 2 is a 1,230 MW nuclear power station in England, United Kingdom. It is operated by British Energy (now part of EDF). Based on reported annual generation of 10,499 GWh, it can supply roughly 2,999,657 homes. It ranks #17 of 2,751 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).

1,230MW installed capacity
10,499GWh reported / yr
2,999,657homes powered

Plant data: WRI Global Power Plant Database (CC BY 4.0), id GBR1000055.

Capacity vs largest nuclear plants in United Kingdom

Heysham 2: 1,230 MW1kHeysham 2Sizewell B: 1,198 MW1kSizewell BTorness: 1,185 MW1kTornessHartlepool: 1,180 MW1kHartlepoolHeysham 1: 1,155 MW1kHeysham 1Dungeness B: 1,050 MW1kDungeness BHunterston B: 965 MW965Hunterston…Hinkley Point B: 955 MW955Hinkley Po…

Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by British Energy (now part of EDF). All plants by this company →

Local climate & thermal context

This nuclear plant uses heat from nuclear fission to raise steam for a turbine-generator. It sits in a temperate oceanic climate (Köppen Cfb) — Northern Hemisphere, latitude 54.0°N — which shapes how much energy it can produce and how its output varies through the year.

8.9°Cannual mean temp
3,297heating degree-days (base 18°C)
0cooling degree-days (base 18°C)
77 melevation

Monthly mean temperature

J: 4 °CJF: 4 °CFM: 5 °CMA: 7 °CAM: 10 °CMJ: 13 °CJJ: 15 °CJA: 15 °CAS: 13 °CSO: 10 °CON: 6 °CND: 4 °CD15 °C

Heating degree-days here run 34% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.

Climate heat-demand index: 71/100 — this site sits in the top third of the power plants we cover by heating degree-days.

In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.

Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.

How it compares & nearby plants

The #1 largest nuclear power plant of 8 in United Kingdom by capacity.

United Kingdom has 8 nuclear power plants in this dataset, together about 8,918 MW of capacity.

Nearby power plants

Location

Coordinates 54.0285, -2.916 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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