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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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48,996 MW
95.7% of 51,188 MW installed
Fleet Availability
95.7%
nuclear generating ÷ installed
Units in Outage
2
at a full outage (0% power)
Units Derated
4
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
89.0%
availability
7,614 MW
online of 8,557
943 MW
offline
9 units: 8 at power 1 in outage
Top markets
Duke Progress 3,593 MW PJM 3,567 MW MISO 1,397 MW
Region III

Midwest

Lisle, IL
94.4%
availability
19,900 MW
online of 21,079
1,180 MW
offline
22 units: 18 at power 3 derated 1 in outage
Top markets
PJM 14,826 MW MISO 6,253 MW
Region IV

West / South-Central

Arlington, TX
99.6%
availability
7,221 MW
online of 7,253
33 MW
offline
7 units: 6 at power 1 derated
Top markets
MISO 3,862 MW CAISO 2,240 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 9 8,557 7,614 89.0% 943 1 / 0 Duke ProgressPJMMISO
Region III Midwest 22 21,079 19,900 94.4% 1,180 1 / 3 PJMMISO
Region IV West / South-Central 7 7,253 7,221 99.6% 33 0 / 1 MISOCAISOBPA
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 (9 units, 7,614 MW online)
North Anna 2 PJM VA 0.0% 943 943 Outage
Grand Gulf 1 MISO MS 100.0% 1,397 — At power
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 (22 units, 19,900 MW online)
Davis-Besse PJM OH 0.0% 894 894 Outage
Clinton MISO IL 83.0% 1,079 183 Derated
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
Callaway MISO MO 100.0% 1,190 — 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
Fermi 2 MISO MI 100.0% 1,141 — 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
Monticello MISO MN 100.0% 617 — At power
Point Beach 2 MISO WI 100.0% 597 — At power
Point Beach 1 MISO WI 100.0% 589 — At power
Prairie Island 1 MISO MN 100.0% 521 — At power
Prairie Island 2 MISO MN 100.0% 519 — At power
Region IV · West / South-Central (7 units, 7,221 MW online)
Waterford 3 MISO LA 97.0% 1,087 33 Derated
Columbia Generating Station BPA WA 100.0% 1,151 — At power
Diablo Canyon 1 CAISO CA 100.0% 1,122 — At power
Diablo Canyon 2 CAISO CA 100.0% 1,118 — At power
Arkansas Nuclear 2 MISO AR 100.0% 982 — At power
River Bend 1 MISO LA 100.0% 968 — At power
Arkansas Nuclear 1 MISO AR 100.0% 826 — 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.