DUANE ARNOLD ENERGY CENTER
OperatingNuclear power plant
- Capacity
- 680 MW
- Primary fuel
- Nuclear
- County
- Linn County
- Operator
- NEXTERA ENERGY DUANE ARNOLD LLC
- Status
- Operating
- EIA plant ID
- 1060
- Coordinates
- 42.1007, -91.7770
DUANE ARNOLD ENERGY CENTER, a 680 MW Nuclear power plant in Linn County, Iowa. Operated by NEXTERA ENERGY DUANE ARNOLD LLC.
Weather peril exposure
DUANE ARNOLD ENERGY CENTER is a 680 MW nuclear power plant in Linn County, IA, operated by NEXTERA ENERGY DUANE ARNOLD LLC. Linn County carries critical modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.3 of 5 at the 82nd national percentile. Heat wave is the leading peril, rated Relatively Low by FEMA at the 89th 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.
Linn County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Heat wave | Relatively Low | 89th | 4.6 of 5 | 5.9 |
| Tornado | Relatively High | 89th | 4.6 of 5 | 0.68 |
| Hail | Relatively High | 86th | 4.4 of 5 | 4.7 |
| Strong wind | Very High | 57th | 3.3 of 5 | 6.1 |
| Winter weather | Relatively High | 53rd | 3.1 of 5 | 16.6 |
| Ice storm | Relatively High | 46th | 2.8 of 5 | 0.31 |
| Lightning | Relatively High | 30th | 2.2 of 5 | 42.8 |
| Wildfire | Very Low | 28th | 2.1 of 5 | <0.01 |
| Riverine flooding | Relatively Moderate | 27th | 2.1 of 5 | 2.2 |
| Earthquake | Very Low | 23rd | 1.9 of 5 | <0.01 |
| Hurricane | Very Low | 2nd | 1.1 of 5 | <0.01 |
Perils not assessed in Linn 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 Linn 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.