Fleet by NRC Region · updated daily
Regions
The U.S. nuclear fleet across the NRC's four regulatory regions. As of Sep 15, 2026 · Updated every morning from the NRC Daily Power Reactor Status Report.
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15,951 MW
92.4% of 17,254 MW installed
Fleet Availability
92.4%
nuclear generating ÷ installed
Units in Outage
1
at a full outage (0% power)
Units Derated
2
running below 98% power
Region II
Southeast
Atlanta, GA
85.3%
availability
6,893 MW
online of 8,080
1,187 MW
offline
8 units:
6 at power
1 derated 1 in outage
Top markets
Southern 8,080 MW
Region IV
West / South-Central
Arlington, TX
98.7%
availability
9,058 MW
online of 9,174
116 MW
offline
8 units:
7 at power
1 derated
Top markets
ERCOT 4,986 MW
CAISO 2,240 MW
SPP 1,948 MW
Region Summary
| Region | Coverage | Units | Capacity | Online | Availability | MW Offline | Offline / Derated | Top markets |
|---|---|---|---|---|---|---|---|---|
| Region II | Southeast | 8 | 8,080 | 6,893 | 85.3% | 1,187 | 1 / 1 | Southern |
| Region IV | West / South-Central | 8 | 9,174 | 9,058 | 98.7% | 116 | 0 / 1 | ERCOTCAISOSPP |
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 II · Southeast (8 units, 6,893 MW online) | ||||||
| Vogtle 2 | Southern | GA | 0.0% | 1,152 | 1,152 | Outage |
| Hatch 2 | Southern | GA | 96.0% | 883 | 35 | Derated |
| Vogtle 1 | Southern | GA | 100.0% | 1,150 | — | At power |
| Vogtle 3 | Southern | GA | 100.0% | 1,114 | — | At power |
| Vogtle 4 | Southern | GA | 100.0% | 1,114 | — | At power |
| Farley 2 | Southern | AL | 100.0% | 896 | — | At power |
| Farley 1 | Southern | AL | 100.0% | 895 | — | At power |
| Hatch 1 | Southern | GA | 100.0% | 876 | — | At power |
| Region IV · West / South-Central (8 units, 9,058 MW online) | ||||||
| Cooper | SPP | NE | 85.0% | 772 | 116 | Derated |
| South Texas 1 | ERCOT | TX | 100.0% | 1,300 | — | At power |
| South Texas 2 | ERCOT | TX | 100.0% | 1,280 | — | At power |
| Comanche Peak 1 | ERCOT | TX | 100.0% | 1,209 | — | At power |
| Comanche Peak 2 | ERCOT | TX | 100.0% | 1,197 | — | At power |
| Wolf Creek 1 | SPP | KS | 100.0% | 1,177 | — | At power |
| Diablo Canyon 1 | CAISO | CA | 100.0% | 1,122 | — | At power |
| Diablo Canyon 2 | CAISO | CA | 100.0% | 1,118 | — | At power |
Ontario (IESO) separate fleet
Ontario detailMW Offline
3,632 MW
29.9% of the Ontario fleet
Units Offline
4 of 16
Bruce, Darlington, Pickering
Delivering
8,528 MW
of 12,160 MW installed
Resolution
1 hour
vs. once-daily for the U.S. fleet
Ontario is not an NRC region, so it sits outside the table above. Ontario is reported as a separate fleet and is never added into the U.S. national figures above. IESO grid-operator market data (MW delivered), not NRC percent-power.