Exelon's Dresden Generating Station in Morris, Illinois technical experts identified water containing tritium in on-site monitoring points through the station's environmental monitoring program.
On Saturday, June 7, the station's environmental team identified tritiated water in one of the station's 83 environmental monitoring wells located near a water storage tank. The station will be working around the clock to excavate the area around the tank, find the location of the leak, and make repairs.
Samples taken from the station's on-site waste water treatment facility also showed low levels of tritium. The station has not detected any unusual levels of tritium offsite.
At Dresden's waste water treatment plant, the sanitary wastewater from the plant is cleaned, disinfected and discharged to the Kankakee River.
These sample points are part of the station's extensive environmental monitoring program designed to detect unusual levels of tritium in the environment and are tested on a monthly basis.
It was a busy 48 hours for the plant, which transferred a 400-ton transformer from a barge on the Illinois river.