BLAYAIS is a 3,640 MW nuclear power station in Aquitaine, France. It is operated by Électricité de France (EDF). Based on reported annual generation of 26,114 GWh, it can supply roughly 7,461,257 homes. It ranks #6 of 2,188 France power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, nuclear supplies about 68.8% of France's electricity; the national grid averages 41 gCO₂/kWh (94.9% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1002694.
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Operated by Électricité de France (EDF).
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 45.3°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 18% below 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: 43/100 — this site sits in the mid 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.
The #6 largest nuclear power plant of 19 in France by capacity.
France has 19 nuclear power plants in this dataset, together about 63,130 MW of capacity.
Coordinates 45.256, -0.6932 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
