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Largest Nuclear Power Plants in the U.S.

In 2012, a significant power upgrade boosted Grand Gulf 1 in Mississippi to the top of the list as the largest single-unit nuclear power plant in the country and fifth largest in the world. See where the others are located and the megawatts of electricity each produces.

Plant Operating utility Capacity
(net MW[e])1
Year
operative
Grand Gulf 1, Miss. Entergy Nuclear 1,419 1985
Palo Verde 2, Ariz. Arizona Nuclear Power Project 1,314 1986
Palo Verde 3, Ariz. Arizona Nuclear Power Project 1,312 1988
Palo Verde 1, Ariz. Arizona Nuclear Power Project 1,311 1986
South Texas 1, Tex. STP Nuclear Operating Co. 1,280 1988
South Texas 2, Tex. STP Nuclear Operating Co. 1,280 1989
Perry 1, Ohio FirstEnergy Nuclear Operating Co. 1,256 1987
Seabrook 1, N.H. North Atlantic Energy Service Corp. 1,246 1990
Millstone 3, Conn.. Dominion Generation 1,233 1986
Comanche Peak 1, Tex. Texas Utilities Electric Co. 1,205 1993
Susquehanna 1, Pa. PP&L 1,260 1985
Comanche Peak 2, Tex. Texas Utilities Electric Co. 1,195 1993
Callaway, Mo. AmerenUE 1,190 1984
Braidwood 1, Ill. Exelon 1,178 1988
Hope Creek 1, N.J. PSEG 1,174 1986
Salem 1, N.J. PSEG 1,168 1977
Byron 1, Ill. Exelon 1,164 1985
Hope Creek 1, N.J. PSEG 1,161 1986
Wolf Creek 1, Kans. Wolf Creek Nuclear Operating 1,160 1985
Waterford 3, La. Entergy Nuclear 1,159 1985
Salem 2, N.J. PSEG 1,158 1977
Braidwood 2, Ill. Exelon 1,152 1988
Vogtle 2, Ga. Southern Nuclear Operating Co. 1,152 1989
Sequoyah 1, Tenn. Tennessee Valley Authority 1,152 1981
Vogtle 1, Ga. Southern Nuclear Operating Co. 1,150 1989
Limerick 2, Penn. Exelon 1,150 1990
Limerick 1, Penn. Exelon 1,146 1986
Nine Mile Point 2, N.Y. Constellation Nuclear 1,144 1988
La Salle 2, Ill. Exelon 1,140 1984
La Salle 1, Ill. Exelon 1,137 1982
Byron 2, Ill. Exelon 1,136 1987
Columbia Generating, Wash. Energy Northwest 1,132 1983
Catawba 1, S.C. Duke Power Co. 1,129 1985
Catawba 2, S.C. Duke Power Co. 1,129 1986
Sequoyah 2, Tenn. Tennessee Valley Authority 1,126 1982
Watts Bar 1, Tenn. Tennessee Valley Authority 1,123 1996
Diablo Canyon 1, Calif. PG&E 1,122 1985
1. MW[e] = megawatts of electricity.
Source: Nuclear Energy Institute, April 2014 update.

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