Fleet by NRC Region · updated daily
Regions
The U.S. nuclear fleet across the NRC's four regulatory regions. As of Sep 17, 2026 · Updated every morning from the NRC Daily Power Reactor Status Report.
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2,240 MW
100.0% of 2,240 MW installed
Fleet Availability
100.0%
nuclear generating ÷ installed
Units in Outage
0
at a full outage (0% power)
Units Derated
0
running below 98% power
Region IV
West / South-Central
Arlington, TX
100.0%
availability
2,240 MW
online of 2,240
0 MW
offline
2 units:
2 at power
Top markets
CAISO 2,240 MW
Region Summary
| Region | Coverage | Units | Capacity | Online | Availability | MW Offline | Offline / Derated | Top markets |
|---|---|---|---|---|---|---|---|---|
| Region IV | West / South-Central | 2 | 2,240 | 2,240 | 100.0% | — | 0 / 0 | CAISO |
NRC regions are administrative areas of the U.S. Nuclear Regulatory Commission, derived here from each plant's state. Availability = generating MW ÷ installed MW.
Fleet by Region
Every reporting unit, grouped by region, biggest supply loss first| Unit | Market | State | Power | Capacity | MW offline | Status |
|---|---|---|---|---|---|---|
| Region IV · West / South-Central (2 units, 2,240 MW online) | ||||||
| Diablo Canyon 1 | CAISO | CA | 100.0% | 1,122 | — | At power |
| Diablo Canyon 2 | CAISO | CA | 100.0% | 1,118 | — | At power |