A suspected pipe or valve leak forced the operators of the Clinton, IL, nuclear power station to remove it from service temporarily.
The power station went offline at 5:24 p.m. Wednesday after operators discovered elevated water levels in a containment sump.
The water levels “could be indicative of a small pipe or valve leak inside the containment building,” said power station spokesman Bill Stoermer.
Maintenance work will continue to occur while the facility is offline, Stoermer said. The nuclear plant is located in DeWitt County, about six miles east of Clinton.
Exelon Corp., based in Chicago, is one of nation’s largest power generators and owns the Clinton plant. In addition to Clinton, the company also owns the Braidwood, Byron, Dresden, LaSalle and Quad Cities plants.