Iowa · Nuclear
Proposed nuclear projects in Iowa
There are 5 proposed nuclear projects in Iowa's interconnection queue, totaling 1.26 GW of requested capacity. The largest is Queue J3932 at 646 MW, and the median planned online year is 2028.
5
Proposed projects
1.26 GW
Requested capacity
252.2 MW
Average project size
2028
Median planned online year
All proposed nuclear projects in Iowa
| Type | ||||
|---|---|---|---|---|
| Queue J3932 J3932 | Nuclear | 646 MW | 2025 | 2029 |
| Replacing 244 MW of Solar with Nuclear; Duane Arnold R5071 | Nuclear | 251 MW | 2025 | 2028 |
| Replacing 200 MW of Solar with Nuclear; J1444 R5069 | Nuclear | 200 MW | 2025 | 2028 |
| Replacing 100 MW of Solar with Nuclear; Duane Arnold R5072 | Nuclear | 100 MW | 2025 | 2028 |
| Replacing 50 MW of Solar with Nuclear; Duane Arnold R5070 | Nuclear | 64 MW | 2025 | 2028 |
Browse Iowa's full interconnection queue. Nationwide: Nuclear plants nationwide.
Source: "Queued Up" (Rand et al., Lawrence Berkeley National Laboratory, 2026 edition). Data: LBNL backbone through December 31, 2025; ISO-region statuses refreshed monthly (last: July 2026); non-ISO West and Southeast as of the LBNL edition.