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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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41,852 MW
92.2% of 45,376 MW installed
Fleet Availability
92.2%
nuclear generating ÷ installed
Units in Outage
3
at a full outage (0% power)
Units Derated
3
running below 98% power
Region I

Northeast

King of Prussia, PA
99.8%
availability
17,613 MW
online of 17,651
37 MW
offline
16 units: 15 at power 1 derated
Top markets
PJM 14,298 MW ISO-NE 3,352 MW
Region II

Southeast

Atlanta, GA
81.5%
availability
9,577 MW
online of 11,748
2,170 MW
offline
11 units: 9 at power 2 in outage
Top markets
TVA 8,181 MW 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
1,151 MW
online of 1,151
0 MW
offline
1 units: 1 at power
Top markets
BPA 1,151 MW

Region Summary

RegionCoverageUnitsCapacity OnlineAvailability MW OfflineOffline / DeratedTop markets
Region I Northeast 16 17,651 17,613 99.8% 37 0 / 1 PJMISO-NE
Region II Southeast 11 11,748 9,577 81.5% 2,170 2 / 0 TVAPJM
Region III Midwest 14 14,826 13,560 91.5% 1,266 1 / 2 PJM
Region IV West / South-Central 1 1,151 1,151 100.0% — 0 / 0 BPA
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 (16 units, 17,613 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
Seabrook 1 ISO-NE NH 100.0% 1,246 — At power
Millstone 3 ISO-NE CT 100.0% 1,243 — 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
Millstone 2 ISO-NE CT 100.0% 863 — At power
Calvert Cliffs 2 PJM MD 100.0% 861 — At power
Region II · Southeast (11 units, 9,577 MW online)
Browns Ferry 1 TVA AL 0.0% 1,227 1,227 Outage
North Anna 2 PJM VA 0.0% 943 943 Outage
Browns Ferry 3 TVA AL 100.0% 1,227 — At power
Browns Ferry 2 TVA AL 100.0% 1,208 — At power
Sequoyah 1 TVA TN 100.0% 1,148 — At power
Sequoyah 2 TVA TN 100.0% 1,126 — At power
Watts Bar 1 TVA TN 100.0% 1,123 — At power
Watts Bar 2 TVA TN 100.0% 1,122 — 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, 13,560 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 (1 units, 1,151 MW online)
Columbia Generating Station BPA WA 100.0% 1,151 — At power