A nuclear power plant in Kashiwazaki, Niigata Prefecture, leaked radioactive water on Saturday but no radiation was released into the surrounding environment, its operator said.
The accident occurred around 11:05 a.m. when about 2 liters of water were found leaking from the drain of a cooling device into a container that houses a reactor, Tokyo Electric Power Co. said.
The No. 1 reactor at the Kashiwazaki-Kariwa nuclear plant was being checked as part of a regular inspection at the time of the accident, Tepco said.
Earlier Saturday, Tepco officials said they had found a worker's shoe and a video cassette in the pressure control pool of the same reactor. The items posed no threat to safety, they added.