Zwentendorf nuclear power plant is a 700 MW nuclear power station in Lower Austria, Austria. It is operated by Tullnerfeld. Based on its capacity (estimated), it can supply roughly 1.6 million homes (estimated). It ranks #6 of 131 Austria power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, nuclear supplies about 0.0% of Austria's electricity; the national grid averages 117 gCO₂/kWh (83.6% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id GEM_nuc_zwentendorf_austr.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and/or fuel fields on this page include a source-backed provenance label from GEM, an official registry, Wikidata, OSM, or a cross-source match.
capacity: Wikidata P2109; fuel: GEM GNPT
Technically it is described as boiling water reactor. Nuclear plants split uranium to raise steam with no direct CO₂; they run as steady baseload with very high capacity factors and the longest operating lifetimes of any thermal plant.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Operated by Tullnerfeld.
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 48.4°N — which shapes how much energy it can produce and how its output varies through the year.
Climate zone & typical temperatures: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid).
For a plant’s outdoor hardware — heat-recovery steam generators (HRSG), expansion joints, valves, flanges and their insulation — the local climate sets how fast unprotected steel and coatings degrade. This site sits in a mild atmospheric environment (estimated ISO 9223 class C2 — Low), with humidity / wetness the leading environmental stress.
Higher environmental severity is exactly where protective removable insulation pays back most: a sheltered micro-climate slows corrosion, UV and thermal-cycling damage and extends outdoor hardware service life. This is an indicative site-climate context — not a condition assessment of any specific plant or operator.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
Austria has 1 nuclear power plant in this dataset, together about 700 MW of capacity.
Coordinates 48.3546, 15.88501 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Zwentendorf nuclear power plant is a 700 MW nuclear power plant in Lower Austria, Austria.
Its output is enough to supply roughly 1,576,800 homes (estimated).
Zwentendorf nuclear power plant is operated by Tullnerfeld.
