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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
24,894 MW
94.8% of 26,268 MW installed
Fleet Availability
94.8%
nuclear generating ÷ installed
Units in Outage
1
at a full outage (0% power)
Units Derated
2
running below 98% power
Region II

Southeast

Atlanta, GA
90.5%
availability
11,058 MW
online of 12,216
1,158 MW
offline
12 units: 11 at power 1 in outage
Top markets
Duke Carolinas 7,226 MW Duke Progress 3,593 MW MISO 1,397 MW
Region III

Midwest

Lisle, IL
97.1%
availability
6,070 MW
online of 6,253
183 MW
offline
8 units: 7 at power 1 derated
Top markets
MISO 6,253 MW
Region IV

West / South-Central

Arlington, TX
99.6%
availability
7,767 MW
online of 7,799
33 MW
offline
7 units: 6 at power 1 derated
Top markets
SRP 3,937 MW MISO 3,862 MW

Region Summary

RegionCoverageUnitsCapacity OnlineAvailability MW OfflineOffline / DeratedTop markets
Region II Southeast 12 12,216 11,058 90.5% 1,158 1 / 0 Duke CarolinasDuke ProgressMISO
Region III Midwest 8 6,253 6,070 97.1% 183 0 / 1 MISO
Region IV West / South-Central 7 7,799 7,767 99.6% 33 0 / 1 SRPMISO
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 (12 units, 11,058 MW online)
McGuire 1 Duke Carolinas NC 0.0% 1,158 1,158 Outage
Grand Gulf 1 MISO MS 100.0% 1,397 — At power
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 III · Midwest (8 units, 6,070 MW online)
Clinton MISO IL 83.0% 1,079 183 Derated
Callaway MISO MO 100.0% 1,190 — At power
Fermi 2 MISO MI 100.0% 1,141 — 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, 7,767 MW online)
Waterford 3 MISO LA 97.0% 1,087 33 Derated
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
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.