(KMOV)-- No injuries were reported after a radioactive water leak at the Ameren Nuclear Plant in Callaway County, Missouri.
A company spokesperson calls it an 'unusual event' and said neither the public nor anyone inside the plant was in danger.
The plant is about 100 miles west of downtown St. Louis.
The leak was captured by a back-up system and Ameren said the plant is running normally.
News 4 dug into company records and found this was the third "unusual event" at Callaway within the last 2 1/2 years. Last February, a hydrogen leak was detected in the turbine building. The building was evacuated as a precaution, but AmerenUE said there was no danger to plant workers or the public. In 2007, the plant also issued the next highest level of public notice an "alert" when a small fire occurred in a transformer.
Unusual Event is a term established by the U.S. Nuclear Regulatory Commission (NRC) to describe a relatively minor occurrence at a nuclear power plant that could reduce the overall level of safety. At an Unusual Event, no action by the public is advised.