KOZLODUY is a 2,000 MW nuclear power station in Vratsa, Bulgaria. It is operated by Kozloduy NPP EAD (Bulgarian Energy Holding). Based on reported annual generation of 15,381 GWh, it can supply roughly 4,394,514 homes. It ranks #1 of 43 Bulgaria power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, nuclear supplies about 39.1% of Bulgaria's electricity; the national grid averages 276 gCO₂/kWh (71.9% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1008053.
Operated by Kozloduy NPP EAD (Bulgarian Energy Holding).
This nuclear plant uses heat from nuclear fission to raise steam for a turbine-generator. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 43.7°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 10% 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: 55/100 — 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.
Bulgaria has 1 nuclear power plant in this dataset, together about 2,000 MW of capacity.
Coordinates 43.7438, 23.7723 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
