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

99.1%

availability

8,560 MW

online of 8,639

79 MW

offline

9 units: 8 at power 1 derated

Top markets

FPL 3,649 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

99.5%

availability

6,070 MW

online of 6,102

33 MW

offline

6 units: 5 at power 1 derated

Top markets

MISO 3,862 MW CAISO 2,240 MW

Region Summary

Region	Coverage	Units	Capacity	Online	Availability	MW Offline	Offline / Derated	Top markets
Region II	Southeast	9	8,639	8,560	99.1%	79	0 / 1	FPLDuke ProgressMISO
Region III	Midwest	8	6,253	6,070	97.1%	183	0 / 1	MISO
Region IV	West / South-Central	6	6,102	6,070	99.5%	33	0 / 1	MISOCAISO

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 (9 units, 8,560 MW online)
Saint Lucie 2	FPL	FL	92.0%	987	79	Derated
Grand Gulf 1	MISO	MS	100.0%	1,397	—	At power
Saint Lucie 1	FPL	FL	100.0%	981	—	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
Turkey Point 4	FPL	FL	100.0%	844	—	At power
Turkey Point 3	FPL	FL	100.0%	837	—	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 (6 units, 6,070 MW online)
Waterford 3	MISO	LA	97.0%	1,087	33	Derated
Diablo Canyon 1	CAISO	CA	100.0%	1,122	—	At power
Diablo Canyon 2	CAISO	CA	100.0%	1,118	—	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.