Nuclear power plant in Ulsan, South Korea. Approximate location 35.7221, 129.4786.
NuclearUlsanSouth Korea
Shin-Wolsong is a 2,000 MW nuclear power station in Ulsan, South Korea. It is operated by Korea Hydro and Nuclear. Based on its capacity (estimated), it can supply roughly 4,505,142 homes (estimated). It ranks #19 of 204 South Korea power plants by installed capacity. Commissioned in 2012, it is around 14 years old — relatively modern. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, nuclear supplies about 29.6% of South Korea's electricity; the national grid averages 417 gCO₂/kWh (40.0% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1000216.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Korea Hydro and Nuclear. All plants by this company →
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 35.7°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 3% 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: 49/100 — 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 6 in South Korea by capacity.
South Korea has 6 nuclear power plants in this dataset, together about 23,076 MW of capacity.
Coordinates 35.7221, 129.4786 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
