Duane Arnold nuclear power plant
Duane Arnold nuclear power plant is a nuclear site in United States with 2 units on record. None is currently operating.
Units
| Unit | Status | Type | Model | Gross MW | Online |
|---|---|---|---|---|---|
| Unit 1 | Retired | BWR | BWR-4 (Mark 1) | 624 | 1975 |
| Unit 1 Repower | Pre-construction | BWR | BWR-4 (Mark 1) | 624 | 2029 |
Unit by unit
Each unit's rating, type and milestone dates as recorded by the Global Nuclear Power Tracker, with any correction we made to it. A dash or "not disclosed" means the source does not give the value.
Duane Arnold nuclear power plant 1 Retired
| Reactor type | Boiling water reactor (BWR) |
|---|---|
| Model | BWR-4 |
| Size class | Large |
| Gross capacity | 624MW |
| Net capacity | 601MW |
| Thermal output | 1,912MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | GE Vernova Hitachi Nuclear Energy |
| Owner | Nextera Energy Resources LLC100% |
| Operator | Nextera Energy Resources |
| Construction start | 22 Jun 1970 |
|---|---|
| First criticality | 23 Mar 1974 |
| Grid connection | 19 May 1974 |
| Commercial operation | 1 Feb 1975 |
| Permanent shutdown | 12 Oct 2020 |
Duane Arnold nuclear power plant 1 Repower Pre-construction
| Reactor type | Boiling water reactor (BWR) |
|---|---|
| Model | BWR-4 |
| Size class | Large |
| Gross capacity | 624MW |
| Net capacity | 601MW |
| Thermal output | 1,912MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | GE Vernova Hitachi Nuclear Energy |
| Owner | Nextera Energy Resources LLC100% |
| Operator | Nextera Energy Resources |
| Commercial operation | 1 Jan 2029 |
|---|
Duane Arnold nuclear power plant in context
The one unit with both construction and grid dates on record took 3.9 years from construction start to grid connection; the median across all reactors connected in the 1970s is 5.4 years.
The nearest other tracked nuclear sites are Quad Cities nuclear power plant (128 km), Byron nuclear power plant (206 km) and LaSalle nuclear power plant (275 km).
Build time by unit
| Unit | Construction start | Grid connection | Years | Fleet median, same decade |
|---|---|---|---|---|
| Unit 1 | 1970 | 1974 | 3.9 | 5.4 (1970s) |
Nearest tracked nuclear sites
| Site | Country | Distance | Operating GW gross |
|---|---|---|---|
| Quad Cities nuclear power plant | United States | 128 km | 1.9 |
| Byron nuclear power plant | United States | 206 km | 2.5 |
| LaSalle nuclear power plant | United States | 275 km | 2.4 |
How these are worked out: ranks use gross operating capacity; ages count from the start-up year on record, as on the age page; build times run from construction start to grid connection, as on the build-times page; ratings are the tracker's net and design net capacity, as on the uprates page. Distances are straight-line between exact positions, so a site with only an approximate position gets none. A unit missing a date or a rating is left out of the figure that needs it.
| Location | Iowa, United States |
|---|---|
| Coordinates | 42.1011, -91.7781 |
| Elevation | about 235 mabove sea level |
| Setting | About 1,260 km from the sea |
| Region | Northern America |
| Units by status | Retired: 1 Pre-construction: 1 |
Elevation is read at the listed coordinates from a 30 m terrain model (SRTM 30 m). Two independent models differ by a median of 6 m across our plants and by up to about 40 m on steep or coastal ground, and a point on a shoreline can read as sea level. Distance to the water is measured to a generalised 1:10 million coastline, so a few kilometres or less is not resolved. This is context, not a design-basis or flood-risk figure.
| Owners | Nextera Energy Resources LLC |
|---|---|
| Operators | Nextera Energy Resources |
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Sources
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06
- GEM.wiki entry (further reading) , CC BY-SA 4.0, linked, not quoted
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data