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
8,556 MW
99.1% of 8,635 MW installed
Fleet Availability
99.1%
nuclear generating ÷ installed
Units in Outage
0
at a full outage (0% power)
Units Derated
1
running below 98% power
Region II
Southeast
Atlanta, GA
97.8%
availability
3,570 MW
online of 3,649
79 MW
offline
4 units:
3 at power
1 derated
Top markets
FPL 3,649 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 II | Southeast | 4 | 3,649 | 3,570 | 97.8% | 79 | 0 / 1 | FPL |
| 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 II · Southeast (4 units, 3,570 MW online) | ||||||
| Saint Lucie 2 | FPL | FL | 92.0% | 987 | 79 | Derated |
| Saint Lucie 1 | FPL | FL | 100.0% | 981 | — | At power |
| Turkey Point 4 | FPL | FL | 100.0% | 844 | — | At power |
| Turkey Point 3 | FPL | FL | 100.0% | 837 | — | 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.