GRAND GULF
OperatingNuclear power plant
- Capacity
- 1,440 MW
- Primary fuel
- Nuclear
- County
- Claiborne County
- Operator
- SYSTEM ENERGY RESOURCES, INC
- Status
- Operating
- Commissioned
- 1985
- EIA plant ID
- 6072
- Generators
- 1
- Technology
- Nuclear
- Net generation (2024)
- 10,653 GWh
- Capacity factor (2024, EIA nameplate)
- 84%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 32.0076, -91.0479
GRAND GULF, a 1,440 MW Nuclear power plant in Claiborne County, Mississippi. Operated by SYSTEM ENERGY RESOURCES, INC, commissioned 1985.
How GRAND GULF compares
With 1,440 MW of capacity, GRAND GULF ranks 2nd among the 37 operating power plants Bywatts maps in Mississippi. It accounts for about 9.4% of all operating capacity in Mississippi. Nationally it is the 32nd-largest of the 55 operating Nuclear plants in the database. Commissioned in 1985, it is older than 57% of the 35 operating Mississippi plants with a recorded commissioning year.
EIA-860 lists 1 generator at the site with 1,440 MW of nameplate capacity, all nuclear technology. Net generation was 10,653 GWh in 2024 (an 84% capacity factor), up 24% from 2022.
Grid neighborhood
The closest transmission line found within 10 miles is a 500 kV line owned by ENTERGY MISSISSIPPI INC, under 0.1 miles away.
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
GRAND GULF is a 1,440 MW nuclear power plant in Claiborne County, MS, operated by SYSTEM ENERGY RESOURCES, INC, commissioned in 1985. Claiborne County carries critical modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.7 of 5 at the 92nd national percentile. Tornado is the leading peril, rated Relatively Moderate by FEMA at the 96th 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.
Claiborne County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Tornado | Relatively Moderate | 96th | 4.8 of 5 | 0.57 |
| Hail | Relatively Low | 92nd | 4.7 of 5 | 3.8 |
| Hurricane | Relatively Low | 80th | 4.2 of 5 | 0.09 |
| Ice storm | Relatively Low | 78th | 4.1 of 5 | 0.99 |
| Strong wind | Relatively Low | 75th | 4.0 of 5 | 3.3 |
| Lightning | Relatively Low | 75th | 4.0 of 5 | 71.2 |
| Heat wave | Relatively Low | 57th | 3.3 of 5 | 16.8 |
| Riverine flooding | Very Low | 55th | 3.2 of 5 | 0.64 |
| Earthquake | Very Low | 50th | 3.0 of 5 | <0.01 |
| Wildfire | Very Low | 42nd | 2.7 of 5 | <0.01 |
| Winter weather | Very Low | 41st | 2.6 of 5 | 2.5 |
Perils not assessed in Claiborne 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 Claiborne 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.