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.

Southeast

Atlanta, GA

85.9%

availability

7,045 MW

online of 8,203

1,158 MW

offline

8 units: 7 at power 1 in outage

Top markets

Duke Carolinas 7,226 MW Dominion SC 977 MW

Region Summary

Region	Coverage	Units	Capacity	Online	Availability	MW Offline	Offline / Derated	Top markets
Region II	Southeast	8	8,203	7,045	85.9%	1,158	1 / 0	Duke CarolinasDominion SC

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

Unit	Market	State	Power	Capacity	MW offline	Status
Region II · Southeast (8 units, 7,045 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
Summer	Dominion SC	SC	100.0%	977	—	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

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.