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

100.0%

availability

17,651 MW

online of 17,651

0 MW

offline

16 units: 16 at power

Top markets

PJM 14,298 MW ISO-NE 3,352 MW

Region II

Southeast

Atlanta, GA

86.0%

availability

13,110 MW

online of 15,240

2,130 MW

offline

16 units: 13 at power 1 derated 2 in outage

Top markets

Southern 8,080 MW Duke Progress 3,593 MW PJM 3,567 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 Summary

Region	Coverage	Units	Capacity	Online	Availability	MW Offline	Offline / Derated	Top markets
Region I	Northeast	16	17,651	17,651	100.0%	—	0 / 0	PJMISO-NE
Region II	Southeast	16	15,240	13,110	86.0%	2,130	2 / 1	SouthernDuke ProgressPJM
Region III	Midwest	14	14,826	13,830	93.3%	996	1 / 2	PJM

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 (16 units, 17,651 MW online)
Peach Bottom 3	PJM	PA	100.0%	1,285	—	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
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	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
Millstone 2	ISO-NE	CT	100.0%	863	—	At power
Calvert Cliffs 2	PJM	MD	100.0%	861	—	At power
Region II · Southeast (16 units, 13,110 MW online)
Vogtle 2	Southern	GA	0.0%	1,152	1,152	Outage
North Anna 2	PJM	VA	0.0%	943	943	Outage
Hatch 2	Southern	GA	96.0%	883	35	Derated
Vogtle 1	Southern	GA	100.0%	1,150	—	At power
Vogtle 3	Southern	GA	100.0%	1,114	—	At power
Vogtle 4	Southern	GA	100.0%	1,114	—	At power
Harris 1	Duke Progress	NC	100.0%	964	—	At power
North Anna 1	PJM	VA	100.0%	948	—	At power
Brunswick 1	Duke Progress	NC	100.0%	938	—	At power
Brunswick 2	Duke Progress	NC	100.0%	932	—	At power
Farley 2	Southern	AL	100.0%	896	—	At power
Farley 1	Southern	AL	100.0%	895	—	At power
Hatch 1	Southern	GA	100.0%	876	—	At power
Surry 1	PJM	VA	100.0%	838	—	At power
Surry 2	PJM	VA	100.0%	838	—	At power
Robinson 2	Duke Progress	SC	100.0%	759	—	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

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.