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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.
Online Now
39,397 MW
95.2% of 41,373 MW installed
Fleet Availability
95.2%
nuclear generating ÷ installed
Units in Outage
2
at a full outage (0% power)
Units Derated
2
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
86.8%
availability
6,217 MW
online of 7,160
943 MW
offline
8 units: 7 at power 1 in outage
Top markets
Duke Progress 3,593 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
5,088 MW
online of 5,088
0 MW
offline
4 units: 4 at power
Top markets
SRP 3,937 MW BPA 1,151 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 8 7,160 6,217 86.8% 943 1 / 0 Duke ProgressPJM
Region III Midwest 14 14,826 13,830 93.3% 996 1 / 2 PJM
Region IV West / South-Central 4 5,088 5,088 100.0% — 0 / 0 SRPBPA
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 (8 units, 6,217 MW online)
North Anna 2 PJM VA 0.0% 943 943 Outage
Harris 1 Duke Progress NC 100.0% 964 — At power
North Anna 1 PJM VA 100.0% 948 — At power
Brunswick 1 Duke Progress NC 100.0% 938 — At power
Brunswick 2 Duke Progress NC 100.0% 932 — At power
Surry 1 PJM VA 100.0% 838 — At power
Surry 2 PJM VA 100.0% 838 — At power
Robinson 2 Duke Progress SC 100.0% 759 — 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, 5,088 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
Columbia Generating Station BPA WA 100.0% 1,151 — 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.