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

74.6%

availability

2,485 MW

online of 3,329

844 MW

offline

4 units: 3 at power 1 in outage

Top markets

NYISO 3,329 MW

Region II

Southeast

Atlanta, GA

90.9%

availability

11,882 MW

online of 13,070

1,187 MW

offline

13 units: 11 at power 1 derated 1 in outage

Top markets

Southern 8,080 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

99.2%

availability

3,830 MW

online of 3,862

33 MW

offline

4 units: 3 at power 1 derated

Top markets

MISO 3,862 MW

Region Summary

Region	Coverage	Units	Capacity	Online	Availability	MW Offline	Offline / Derated	Top markets
Region I	Northeast	4	3,329	2,485	74.6%	844	1 / 0	NYISO
Region II	Southeast	13	13,070	11,882	90.9%	1,187	1 / 1	SouthernDuke ProgressMISO
Region III	Midwest	8	6,253	6,070	97.1%	183	0 / 1	MISO
Region IV	West / South-Central	4	3,862	3,830	99.2%	33	0 / 1	MISO

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 (4 units, 2,485 MW online)
FitzPatrick	NYISO	NY	0.0%	844	844	Outage
Nine Mile Point 2	NYISO	NY	100.0%	1,283	—	At power
Nine Mile Point 1	NYISO	NY	100.0%	621	—	At power
Ginna	NYISO	NY	100.0%	581	—	At power
Region II · Southeast (13 units, 11,882 MW online)
Vogtle 2	Southern	GA	0.0%	1,152	1,152	Outage
Hatch 2	Southern	GA	96.0%	883	35	Derated
Grand Gulf 1	MISO	MS	100.0%	1,397	—	At power
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
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
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 (4 units, 3,830 MW online)
Waterford 3	MISO	LA	97.0%	1,087	33	Derated
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.