Quad Cities Nuclear Power Plant is a two-unit nuclear power plant located near Cordova, Illinois, USA on the Mississippi River. The two General Electric boiling water reactors give the plant a total electric capacity of approximately 1,824 MW. It was named for the nearby cities of Moline, Illinois, Rock Island, Illinois, Davenport, Iowa, East Moline, Illinois and Bettendorf, Iowa — known as the Quad Cities.

The Quad Cities Nuclear Power Plant is owned and operated by Exelon Corporation. In 2004, the U.S. Nuclear Regulatory Commission (NRC) approved a 20-year license extension for both reactors at this plant.

xtended power uprate

During an extended power uprate test on March 5, 2002 designed to extend the power efficiency of existing BWR reactors the Quad Cities Nuclear Power Plant unit 2 began to experience vibrations in a steam line. On March 29 the plant was manually shut down due to high vibrations causing leaks in the main turbine control system. Unit 2 had a restart on April 2, but vibration broke a main steam pipe drain line. The line was repaired and the restart resumed but by June 7 the main steam lines were showing unexplained aberrations. The plant was again taken offline for repairs on July 11. The problem was traced to a hole in the steam dryer — it was repaired, then unit 2 was restarted on July 21, 2002. The incident did not result in any increased probability of an accident. The NRC inspected all repairs and the extended power uprate was completed successfully.