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
33,526 MW
94.1% of 35,617 MW installed
Fleet Availability
94.1%
nuclear generating ÷ installed
Units in Outage
2
at a full outage (0% power)
Units Derated
3
running below 98% power
Region I
Northeast
King of Prussia, PA
100.0%
availability
14,298 MW
online of 14,298
0 MW
offline
13 units:
13 at power
Top markets
PJM 14,298 MW
Region II
Southeast
Atlanta, GA
79.2%
availability
3,601 MW
online of 4,544
943 MW
offline
5 units:
4 at power
1 in outage
Top markets
PJM 3,567 MW
Dominion SC 977 MW
Region III
Midwest
Lisle, IL
93.3%
availability
13,830 MW
online of 14,826
996 MW
offline
14 units:
11 at power
2 derated 1 in outage
Top markets
PJM 14,826 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 I | Northeast | 13 | 14,298 | 14,298 | 100.0% | — | 0 / 0 | PJM |
| Region II | Southeast | 5 | 4,544 | 3,601 | 79.2% | 943 | 1 / 0 | PJMDominion SC |
| Region III | Midwest | 14 | 14,826 | 13,830 | 93.3% | 996 | 1 / 2 | PJM |
| 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 I · Northeast (13 units, 14,298 MW online) | ||||||
| Peach Bottom 3 | PJM | PA | 100.0% | 1,285 | — | At power |
| Peach Bottom 2 | PJM | PA | 99.0% | 1,265 | — | At power |
| Susquehanna 1 | PJM | PA | 100.0% | 1,247 | — | At power |
| Susquehanna 2 | PJM | PA | 100.0% | 1,247 | — | At power |
| Hope Creek 1 | PJM | NJ | 98.0% | 1,172 | — | At power |
| Salem 1 | PJM | NJ | 100.0% | 1,146 | — | At power |
| Salem 2 | PJM | NJ | 100.0% | 1,142 | — | At power |
| Limerick 2 | PJM | PA | 100.0% | 1,122 | — | At power |
| Limerick 1 | PJM | PA | 100.0% | 1,120 | — | At power |
| Beaver Valley 1 | PJM | PA | 100.0% | 907 | — | At power |
| Beaver Valley 2 | PJM | PA | 100.0% | 901 | — | At power |
| Calvert Cliffs 1 | PJM | MD | 100.0% | 884 | — | At power |
| Calvert Cliffs 2 | PJM | MD | 100.0% | 861 | — | At power |
| Region II · Southeast (5 units, 3,601 MW online) | ||||||
| North Anna 2 | PJM | VA | 0.0% | 943 | 943 | Outage |
| Summer | Dominion SC | SC | 100.0% | 977 | — | At power |
| North Anna 1 | PJM | VA | 100.0% | 948 | — | At power |
| Surry 1 | PJM | VA | 100.0% | 838 | — | At power |
| Surry 2 | PJM | VA | 100.0% | 838 | — | At power |
| Region III · Midwest (14 units, 13,830 MW online) | ||||||
| Davis-Besse | PJM | OH | 0.0% | 894 | 894 | Outage |
| Byron 2 | PJM | IL | 95.0% | 1,136 | 57 | Derated |
| Quad Cities 2 | PJM | IL | 95.0% | 911 | 46 | Derated |
| Perry 1 | PJM | OH | 100.0% | 1,240 | — | At power |
| Braidwood 1 | PJM | IL | 100.0% | 1,183 | — | At power |
| D.C. Cook 2 | PJM | MI | 100.0% | 1,168 | — | At power |
| Byron 1 | PJM | IL | 100.0% | 1,164 | — | At power |
| Braidwood 2 | PJM | IL | 100.0% | 1,152 | — | At power |
| LaSalle 2 | PJM | IL | 100.0% | 1,134 | — | At power |
| LaSalle 1 | PJM | IL | 100.0% | 1,131 | — | At power |
| D.C. Cook 1 | PJM | MI | 100.0% | 1,009 | — | At power |
| Quad Cities 1 | PJM | IL | 100.0% | 908 | — | At power |
| Dresden 2 | PJM | IL | 100.0% | 902 | — | At power |
| Dresden 3 | PJM | IL | 100.0% | 895 | — | 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.