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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 15, 2026 · Updated every morning from the NRC Daily Power Reactor Status Report.
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48,663 MW
91.8% of 52,984 MW installed
Fleet Availability
91.8%
nuclear generating ÷ installed
Units in Outage
4
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
82.6%
availability
15,584 MW
online of 18,873
3,288 MW
offline
19 units: 15 at power 1 derated 3 in outage
Top markets
Southern 8,080 MW Duke Carolinas 7,226 MW PJM 3,567 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
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

RegionCoverageUnitsCapacity OnlineAvailability MW OfflineOffline / DeratedTop markets
Region I Northeast 13 14,298 14,298 100.0% — 0 / 0 PJM
Region II Southeast 19 18,873 15,584 82.6% 3,288 3 / 1 SouthernDuke CarolinasPJM
Region III Midwest 14 14,826 13,830 93.3% 996 1 / 2 PJM
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
UnitMarketStatePowerCapacityMW offlineStatus
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 (19 units, 15,584 MW online)
McGuire 1 Duke Carolinas NC 0.0% 1,158 1,158 Outage
Vogtle 2 Southern GA 0.0% 1,152 1,152 Outage
North Anna 2 PJM VA 0.0% 943 943 Outage
Hatch 2 Southern GA 96.0% 883 35 Derated
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
Vogtle 1 Southern GA 100.0% 1,150 — At power
Vogtle 3 Southern GA 100.0% 1,114 — At power
Vogtle 4 Southern GA 100.0% 1,114 — At power
North Anna 1 PJM VA 100.0% 948 — At power
Farley 2 Southern AL 100.0% 896 — At power
Farley 1 Southern AL 100.0% 895 — At power
Hatch 1 Southern GA 100.0% 876 — 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
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 (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 detail
MW 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.