Nuclear power plant in Jihocesky, Czech Republic. Approximate location 49.1796, 14.3795.
NuclearJihoceskyCzech Republic
Temelín is a 2,133 MW nuclear power station in Jihocesky, Czech Republic. It is operated by CEZ Group. Based on reported annual generation of 15,655 GWh, it can supply roughly 4,472,885 homes. It ranks #1 of 472 Czech Republic power plants by installed capacity. Commissioned in 2002, it is around 24 years old — relatively modern. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, nuclear supplies about 42.3% of Czech Republic's electricity; the national grid averages 401 gCO₂/kWh (59.2% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1019174.
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Operated by CEZ Group. All plants by this company →
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 49.2°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 41% 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: 75/100 — 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.
The #1 largest nuclear power plant of 2 in Czech Republic by capacity.
Czech Republic has 2 nuclear power plants in this dataset, together about 4,173 MW of capacity.
Coordinates 49.1796, 14.3795 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
