Nuclear power plant in Texas, United States of America. Approximate location 28.5033, -96.7745.
NuclearTexasUnited States of AmericaXe-100high temperature gas reactorPre Construction
Long Mott nuclear power plant is a 320 MW nuclear power station in Texas, United States of America. It is operated by The Dow Chemical Company. Based on its capacity (estimated), it can supply roughly 721k homes (estimated). It ranks #1587 of 10,938 United States of America power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, nuclear supplies about 17.4% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id GEM_nuc_longmott_unite.
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 320 MW, Long Mott nuclear power plant is below the median nuclear plant in United States of America (1,917 MW). Technically it is described as high temperature gas reactor. Its current lifecycle status is “Pre Construction” — 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 The Dow Chemical 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 28.5°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 84% 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: 19/100 — this site sits in the bottom 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 an aggressive, high-corrosion environment (estimated ISO 9223 class C5 — Very high), with marine salt corrosion 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 #202 largest nuclear power plant of 230 in United States of America by capacity.
United States of America has 230 nuclear power plants in this dataset, together about 427,888 MW of capacity.
Coordinates 28.5033, -96.7745 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Long Mott nuclear power plant is a 320 MW nuclear power plant in Texas, United States of America, Pre Construction 2033.
Its output is enough to supply roughly 720,822 homes (estimated).
Long Mott nuclear power plant is operated by The Dow Chemical Company.
