Kewaunee Nuclear Generating Station

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Kewaunee Nuclear Generating Station

The Kewaunee Power Station occupies a 900-acre (3.6 km2) site in Carlton, Wisconsin, 27 miles (43 km) southeast of Green Bay, Wisconsin, USA. Kewaunee was the fourth nuclear power plant built in Wisconsin, and the 44th built in the United States.


The plant's original operator was Wisconsin Public Service and it was owned by Wisconsin Public Service (59%) and Alliant Energy (41%). From 2000 to July 2005 the plant was operated by Nuclear Management Company, of Hudson, Wisconsin. The plant is currently owned and operated by Dominion Resources, of Richmond, Virginia. In 2008, Dominion applied to the Nuclear Regulatory Commission (NRC) for an extension of its operating license for an additional twenty years. The license was extended until 2033.

On April 27, 2006, there was a small water leak at the plant, though no radioactive material was released.


This plant has one Westinghouse pressurized water reactor. The plant has two 345 kV lines interconnecting it to the grid with one going to We Energies North Appleton Substation located 15 miles (24 km) north of Appleton, Wisconsin and the other one interconecting with the Point Beach Nuclear Generating Station located just a short distance away. Two 138 kV lines exit the plant which go to the Green Bay area 30 miles (48 km) away.

Surrounding population

The Nuclear Regulatory Commission defines two emergency planning zones around nuclear power plants: a plume exposure pathway zone with a radius of 10 miles (16 km), concerned primarily with exposure to, and inhalation of, airborne radioactive contamination, and an ingestion pathway zone of about 50 miles (80 km), concerned primarily with ingestion of food and liquid contaminated by radioactivity.

The 2010 U.S. population within 10 miles (16 km) of Kewaunee was 10,292, a decrease of 0.9 percent in a decade, according to an analysis of U.S. Census data for The 2010 U.S. population within 50 miles (80 km) was 776,954, an increase of 10.1 percent since 2000. Cities within 50 miles include Green Bay (26 miles to city center).

Seismic risk

The Nuclear Regulatory Commission's estimate of the risk each year of an earthquake intense enough to cause core damage to the reactor at Kewaunee was 1 in 83,333, according to an NRC study published in August 2010.

  • Kewaunee Power Station, Kewaunee, Wisconsin

  • Kewaunee Power Station, 2007

  • Kewaunee Power Station, 2009


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