Stawy Monowskie nuclear power plant is a 1,200 MW nuclear power station in Lesser Poland Voivodeship, Poland. It is operated by Orlen Synthos Green Energy [100%]. Based on its capacity (estimated), it can supply roughly 2.7 million homes (estimated). It ranks #21 of 246 Poland 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 Poland's electricity; the national grid averages 589 gCO₂/kWh (31.5% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id GEM_nuc_stawymonowskie_polan.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and fuel fields on this page are source-record values from the upstream open dataset. They are useful for identification and ranking, but they have not been upgraded to a 2026 registry/GEM-location verified value.
capacity: GEM GNPT; fuel: GEM GNPT
At 1,200 MW, Stawy Monowskie nuclear power plant is around the median nuclear plant in Poland (1,200 MW). Technically it is described as small modular reactor. Its current lifecycle status is “Announced” — so it is not yet, or no longer, generating at full output. 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.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Orlen Synthos Green Energy [100%].
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 50.0°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 43% 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: 76/100 — this site sits in the top third of the power plants we cover by heating degree-days.
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.
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.
The #7 largest nuclear power plant of 10 in Poland by capacity.
Poland has 10 nuclear power plants in this dataset, together about 15,072 MW of capacity.
Coordinates 50.024621, 19.3339713 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Stawy Monowskie nuclear power plant is a 1,200 MW nuclear power plant in Lesser Poland Voivodeship, Poland.
Its output is enough to supply roughly 2,703,085 homes (estimated).
Stawy Monowskie nuclear power plant is operated by Orlen Synthos Green Energy [100%].
