Nuclear power plant in Rio de Janeiro, Brazil. Approximate location -23.0072, -44.4588.
NuclearRio de JaneiroBrazil
Almirante Álvaro Alberto - Unidade II (Antiga Angra II) is a 1,350 MW nuclear power station in Rio de Janeiro, Brazil. Based on its capacity (estimated), it can supply roughly 3,040,971 homes (estimated). It ranks #20 of 2,549 Brazil power plants by installed capacity. Commissioned in 2000, it is around 26 years old — long-established. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, nuclear supplies about 2.1% of Brazil's electricity; the national grid averages 110 gCO₂/kWh (88.7% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id BRA0000101.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
This nuclear plant uses heat from nuclear fission to raise steam for a turbine-generator. It sits in a humid subtropical climate (Köppen Cfa) — Southern Hemisphere, latitude 23.0°S — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 100% 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: 13/100 — this site sits in the bottom 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 Brazil by capacity.
Brazil has 2 nuclear power plants in this dataset, together about 1,990 MW of capacity.
Coordinates -23.0072, -44.4588 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
