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
8,308 MW
87.8% of 9,466 MW installed
Fleet Availability
87.8%
nuclear generating ÷ installed
Units in Outage
1
at a full outage (0% power)
Units Derated
0
running below 98% power
Region II
Southeast
Atlanta, GA
84.0%
availability
6,068 MW
online of 7,226
1,158 MW
offline
7 units:
6 at power
1 in outage
Top markets
Duke Carolinas 7,226 MW
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 II | Southeast | 7 | 7,226 | 6,068 | 84.0% | 1,158 | 1 / 0 | Duke Carolinas |
| 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 II · Southeast (7 units, 6,068 MW online) | ||||||
| McGuire 1 | Duke Carolinas | NC | 0.0% | 1,158 | 1,158 | Outage |
| 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 |
| 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 (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 |
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.