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.
Online Now
20,431 MW
86.5% of 23,621 MW installed
Fleet Availability
86.5%
nuclear generating ÷ installed
Units in Outage
3
at a full outage (0% power)
Units Derated
1
running below 98% power
Region I
Northeast
King of Prussia, PA
74.6%
availability
2,485 MW
online of 3,329
844 MW
offline
4 units:
3 at power
1 in outage
Top markets
NYISO 3,329 MW
Region II
Southeast
Atlanta, GA
84.7%
availability
12,960 MW
online of 15,306
2,345 MW
offline
15 units:
12 at power
1 derated 2 in outage
Top markets
Southern 8,080 MW
Duke Carolinas 7,226 MW
Region IV
West / South-Central
Arlington, TX
100.0%
availability
4,986 MW
online of 4,986
0 MW
offline
4 units:
4 at power
Top markets
ERCOT 4,986 MW
Region Summary
| Region | Coverage | Units | Capacity | Online | Availability | MW Offline | Offline / Derated | Top markets |
|---|---|---|---|---|---|---|---|---|
| Region I | Northeast | 4 | 3,329 | 2,485 | 74.6% | 844 | 1 / 0 | NYISO |
| Region II | Southeast | 15 | 15,306 | 12,960 | 84.7% | 2,345 | 2 / 1 | SouthernDuke Carolinas |
| Region IV | West / South-Central | 4 | 4,986 | 4,986 | 100.0% | — | 0 / 0 | ERCOT |
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 I · Northeast (4 units, 2,485 MW online) | ||||||
| FitzPatrick | NYISO | NY | 0.0% | 844 | 844 | Outage |
| Nine Mile Point 2 | NYISO | NY | 100.0% | 1,283 | — | At power |
| Nine Mile Point 1 | NYISO | NY | 100.0% | 621 | — | At power |
| Ginna | NYISO | NY | 100.0% | 581 | — | At power |
| Region II · Southeast (15 units, 12,960 MW online) | ||||||
| McGuire 1 | Duke Carolinas | NC | 0.0% | 1,158 | 1,158 | Outage |
| Vogtle 2 | Southern | GA | 0.0% | 1,152 | 1,152 | Outage |
| Hatch 2 | Southern | GA | 96.0% | 883 | 35 | Derated |
| Catawba 1 | Duke Carolinas | SC | 100.0% | 1,160 | — | At power |
| McGuire 2 | Duke Carolinas | NC | 100.0% | 1,158 | — | At power |
| Catawba 2 | Duke Carolinas | SC | 100.0% | 1,150 | — | At power |
| 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 |
| Oconee 3 | Duke Carolinas | SC | 100.0% | 873 | — | At power |
| Oconee 2 | Duke Carolinas | SC | 100.0% | 865 | — | At power |
| Oconee 1 | Duke Carolinas | SC | 100.0% | 862 | — | At power |
| Region IV · West / South-Central (4 units, 4,986 MW online) | ||||||
| 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 |
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.