COMANCHE PEAK
OperatingNuclear power plant
- Capacity
- 2,430 MW
- Primary fuel
- Nuclear
- County
- Somervell County
- Operator
- LUMINANT GENERATION COMPANY LLC
- Status
- Operating
- Commissioned
- 1990
- EIA plant ID
- 6145
- Generators
- 2
- Technology
- Nuclear
- Net generation (2024)
- 19,687 GWh
- Capacity factor (2024, EIA nameplate)
- 92%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 32.2984, -97.7855
COMANCHE PEAK, a 2,430 MW Nuclear power plant in Somervell County, Texas. Operated by LUMINANT GENERATION COMPANY LLC, commissioned 1990.
How COMANCHE PEAK compares
With 2,430 MW of capacity, COMANCHE PEAK ranks 3rd among the 307 operating power plants Bywatts maps in Texas and is the smallest of the 2 operating Nuclear plants in the state. It accounts for about 47% of Texas's operating Nuclear capacity and 2.3% of all operating capacity in the state. Nationally it is the 10th-largest of the 55 operating Nuclear plants in the database. Commissioned in 1990, it is older than 62% of the 303 operating Texas plants with a recorded commissioning year. Its operator, LUMINANT GENERATION COMPANY LLC, runs 9 operating plants in Texas totaling 9,469 MW.
EIA-860 lists 2 generators at the site with 2,430 MW of nameplate capacity, all nuclear technology. Net generation was 19,687 GWh in 2024 (a 92% capacity factor), about the same as in 2022. Its generators came online between 1990 and 1993.
Grid neighborhood
The closest transmission line found within 10 miles is a 345 kV line owned by ONCOR ELECTRIC DELIVERY CO., under 0.1 miles away. Another 3 operating power plants totaling 2,249 MW sit within 25 miles; the largest is DECORDOVA STEAM ELECTRIC STATION (1,157 MW, Natural Gas).
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
COMANCHE PEAK is a 2,430 MW nuclear power plant in Somervell County, TX, operated by LUMINANT GENERATION COMPANY LLC, commissioned in 1990. Somervell County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.0 of 5 at the 75th national percentile. Lightning is the leading peril, rated Relatively Low by FEMA at the 91st percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a nuclear plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Somervell County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Lightning | Relatively Low | 91st | 4.6 of 5 | 51.0 |
| Wildfire | Relatively Low | 85th | 4.4 of 5 | <0.01 |
| Tornado | Relatively Low | 83rd | 4.3 of 5 | 0.15 |
| Hail | Relatively Low | 78th | 4.1 of 5 | 7.3 |
| Ice storm | Relatively Low | 69th | 3.8 of 5 | 0.88 |
| Riverine flooding | Very Low | 69th | 3.8 of 5 | 0.64 |
| Heat wave | Very Low | 66th | 3.6 of 5 | 14.2 |
| Hurricane | Very Low | 58th | 3.3 of 5 | 0.02 |
| Winter weather | Very Low | 51st | 3.0 of 5 | 4.1 |
| Strong wind | Very Low | 46th | 2.8 of 5 | 2.9 |
| Earthquake | Very Low | 11th | 1.4 of 5 | <0.01 |
Perils not assessed in Somervell County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Somervell County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.