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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
13,733 MW
91.5% of 15,007 MW installed
Fleet Availability
91.5%
nuclear generating ÷ installed
Units in Outage
1
at a full outage (0% power)
Units Derated
1
running below 98% power
Region II

Southeast

Atlanta, GA
89.3%
availability
9,661 MW
online of 10,819
1,158 MW
offline
11 units: 10 at power 1 in outage
Top markets
Duke Carolinas 7,226 MW Duke Progress 3,593 MW
Region IV

West / South-Central

Arlington, TX
97.2%
availability
4,072 MW
online of 4,188
116 MW
offline
4 units: 3 at power 1 derated
Top markets
CAISO 2,240 MW SPP 1,948 MW

Region Summary

RegionCoverageUnitsCapacity OnlineAvailability MW OfflineOffline / DeratedTop markets
Region II Southeast 11 10,819 9,661 89.3% 1,158 1 / 0 Duke CarolinasDuke Progress
Region IV West / South-Central 4 4,188 4,072 97.2% 116 0 / 1 CAISOSPP
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 II · Southeast (11 units, 9,661 MW online)
McGuire 1 Duke Carolinas NC 0.0% 1,158 1,158 Outage
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
Harris 1 Duke Progress NC 100.0% 964 — At power
Brunswick 1 Duke Progress NC 100.0% 938 — At power
Brunswick 2 Duke Progress NC 100.0% 932 — 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
Robinson 2 Duke Progress SC 100.0% 759 — At power
Region IV · West / South-Central (4 units, 4,072 MW online)
Cooper SPP NE 85.0% 772 116 Derated
Wolf Creek 1 SPP KS 100.0% 1,177 — At power
Diablo Canyon 1 CAISO CA 100.0% 1,122 — At power
Diablo Canyon 2 CAISO CA 100.0% 1,118 — 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.