Largest nuclear power plants in ISO-NE

2 ranked plants with 3.5 GW of EIA nameplate capacity; the largest is Millstone at 2,259.9 MW.

Nuclear power plants ranked by EIA-reported nameplate capacity. Rankings use EIA-anchored plant records in ISO-NE.

Nuclear capacity ranking

2 matching plants · ranked by nameplate capacity

Rank	Plant	Capacity	Type	Operator	Location
1	MillstoneDominion Energy Nuclear Conn IncDetailed profile	2,259.9 MW	Nuclear	Dominion Energy Nuclear Conn Inc	New London County
2	SeabrookNextEra Energy Seabrook LLCDetailed profile	1,242 MW	Nuclear	NextEra Energy Seabrook LLC	Rockingham County

Capacity is EIA-reported nameplate capacity, not seasonal capability or available operating capacity. A plant can include multiple generators and technologies; hybrid plants may appear in multiple peer groups.