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.

Northeast

King of Prussia, PA

95.2%

availability

16,783 MW

online of 17,627

844 MW

offline

17 units: 16 at power 1 in outage

Top markets

PJM 14,298 MW NYISO 3,329 MW

Region II

Southeast

Atlanta, GA

79.2%

availability

3,601 MW

online of 4,544

943 MW

offline

5 units: 4 at power 1 in outage

Top markets

PJM 3,567 MW Dominion SC 977 MW

Region III

Midwest

Lisle, IL

93.3%

availability

13,830 MW

online of 14,826

996 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

94.1%

availability

1,832 MW

online of 1,948

116 MW

offline

2 units: 1 at power 1 derated

Top markets

SPP 1,948 MW

Region Summary

Region	Coverage	Units	Capacity	Online	Availability	MW Offline	Offline / Derated	Top markets
Region I	Northeast	17	17,627	16,783	95.2%	844	1 / 0	PJMNYISO
Region II	Southeast	5	4,544	3,601	79.2%	943	1 / 0	PJMDominion SC
Region III	Midwest	14	14,826	13,830	93.3%	996	1 / 2	PJM
Region IV	West / South-Central	2	1,948	1,832	94.1%	116	0 / 1	SPP

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 I · Northeast (17 units, 16,783 MW online)
FitzPatrick	NYISO	NY	0.0%	844	844	Outage
Peach Bottom 3	PJM	PA	100.0%	1,285	—	At power
Nine Mile Point 2	NYISO	NY	100.0%	1,283	—	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
Nine Mile Point 1	NYISO	NY	100.0%	621	—	At power
Ginna	NYISO	NY	100.0%	581	—	At power
Region II · Southeast (5 units, 3,601 MW online)
North Anna 2	PJM	VA	0.0%	943	943	Outage
Summer	Dominion SC	SC	100.0%	977	—	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, 13,830 MW online)
Davis-Besse	PJM	OH	0.0%	894	894	Outage
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
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
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
Region IV · West / South-Central (2 units, 1,832 MW online)
Cooper	SPP	NE	85.0%	772	116	Derated
Wolf Creek 1	SPP	KS	100.0%	1,177	—	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.