Kansai Electric Power (TYO:9503) said that its nuclear reactor Unit 3 at the Ohi Nuclear Power Station in Japan automatically shut down after a 'Loss of Field' alarm was activated while the plant was operating at its rated thermal power.
The electric utility company said the alarm was triggered on Aug. 8, causing the generator to trip automatically and the reactor to shut down, according to a Tokyo Stock Exchange filing on Monday.
The company is investigating the cause of the incident, and there has been no radiological impact on the surrounding environment.