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Fleet by NRC Region · updated daily

Regions

The U.S. nuclear fleet across the NRC's four regulatory regions. As of Sep 17, 2026 · Updated every morning from the NRC Daily Power Reactor Status Report.
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41,558 MW
94.8% of 43,855 MW installed
Fleet Availability
94.8%
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
99.7%
availability
14,261 MW
online of 14,298
37 MW
offline
13 units: 12 at power 1 derated
Top markets
PJM 14,298 MW
Region II

Southeast

Atlanta, GA
73.6%
availability
2,624 MW
online of 3,567
943 MW
offline
4 units: 3 at power 1 in outage
Top markets
PJM 3,567 MW
Region III

Midwest

Lisle, IL
91.5%
availability
13,560 MW
online of 14,826
1,266 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
100.0%
availability
11,163 MW
online of 11,163
0 MW
offline
9 units: 9 at power
Top markets
ERCOT 4,986 MW SRP 3,937 MW CAISO 2,240 MW

Region Summary

RegionCoverageUnitsCapacity OnlineAvailability MW OfflineOffline / DeratedTop markets
Region I Northeast 13 14,298 14,261 99.7% 37 0 / 1 PJM
Region II Southeast 4 3,567 2,624 73.6% 943 1 / 0 PJM
Region III Midwest 14 14,826 13,560 91.5% 1,266 1 / 2 PJM
Region IV West / South-Central 9 11,163 11,163 100.0% — 0 / 0 ERCOTSRPCAISO
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
UnitMarketStatePowerCapacityMW offlineStatus
Region I · Northeast (13 units, 14,261 MW online)
Susquehanna 1 PJM PA 97.0% 1,247 37 Derated
Peach Bottom 3 PJM PA 100.0% 1,285 — At power
Peach Bottom 2 PJM PA 98.0% 1,265 — At power
Susquehanna 2 PJM PA 100.0% 1,247 — At power
Hope Creek 1 PJM NJ 100.0% 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 (4 units, 2,624 MW online)
North Anna 2 PJM VA 0.0% 943 943 Outage
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, 13,560 MW online)
Davis-Besse PJM OH 0.0% 894 894 Outage
D.C. Cook 1 PJM MI 71.0% 1,009 293 Derated
Byron 2 PJM IL 93.0% 1,136 80 Derated
Perry 1 PJM OH 98.0% 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
Quad Cities 2 PJM IL 100.0% 911 — 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 (9 units, 11,163 MW online)
Palo Verde 2 SRP AZ 100.0% 1,314 — At power
Palo Verde 3 SRP AZ 100.0% 1,312 — At power
Palo Verde 1 SRP AZ 100.0% 1,311 — At power
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
Diablo Canyon 1 CAISO CA 100.0% 1,122 — At power
Diablo Canyon 2 CAISO CA 100.0% 1,118 — At power