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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12,379 MW
90.2% of 13,722 MW installed
Fleet Availability
90.2%
nuclear generating ÷ installed
Units in Outage
1
at a full outage (0% power)
Units Derated
1
running below 98% power
Region II
Southeast
Atlanta, GA
89.6%
availability
10,546 MW
online of 11,774
1,227 MW
offline
11 units:
10 at power
1 in outage
Top markets
TVA 8,181 MW
Duke Progress 3,593 MW
Region IV
West / South-Central
Arlington, TX
94.1%
availability
1,832 MW
online of 1,948
116 MW
offline
2 units:
1 at power
1 derated
Top markets
SPP 1,948 MW
Region Summary
| Region | Coverage | Units | Capacity | Online | Availability | MW Offline | Offline / Derated | Top markets |
|---|---|---|---|---|---|---|---|---|
| Region II | Southeast | 11 | 11,774 | 10,546 | 89.6% | 1,227 | 1 / 0 | TVADuke Progress |
| Region IV | West / South-Central | 2 | 1,948 | 1,832 | 94.1% | 116 | 0 / 1 | SPP |
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 (11 units, 10,546 MW online) | ||||||
| Browns Ferry 1 | TVA | AL | 0.0% | 1,227 | 1,227 | Outage |
| Browns Ferry 3 | TVA | AL | 100.0% | 1,227 | — | At power |
| Browns Ferry 2 | TVA | AL | 100.0% | 1,208 | — | At power |
| Sequoyah 1 | TVA | TN | 100.0% | 1,148 | — | At power |
| Sequoyah 2 | TVA | TN | 100.0% | 1,126 | — | At power |
| Watts Bar 1 | TVA | TN | 100.0% | 1,123 | — | At power |
| Watts Bar 2 | TVA | TN | 100.0% | 1,122 | — | At power |
| Harris 1 | Duke Progress | NC | 100.0% | 964 | — | At power |
| Brunswick 1 | Duke Progress | NC | 100.0% | 938 | — | At power |
| Brunswick 2 | Duke Progress | NC | 100.0% | 932 | — | At power |
| Robinson 2 | Duke Progress | SC | 100.0% | 759 | — | At power |
| Region IV · West / South-Central (2 units, 1,832 MW online) | ||||||
| Cooper | SPP | NE | 85.0% | 772 | 116 | Derated |
| Wolf Creek 1 | SPP | KS | 100.0% | 1,177 | — | 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.