Japan’s Kansai Electric Power Company (KEPCO) said on Monday that a nuclear reactor at its Takahama power plant shut down automatically after a problem with a generator triggered an alarm.
The No. 4 reactor, which was brought back online last Friday, was deactivated after an automatic alarm system prompted control rods to be inserted according to the Japan Times
The latest incident follows a radioactive water leak at the same plant just over a week ago, amid a government push to restart reactors five years after the Fukushima disaster.
There is no problem with the reactor’s cooling system, the company said. KEPCO was trying to send power to the grid from the reactor when the turbine shut down, which led to the automatic shutdown of the entire reactor, a company spokesman said. He added the company does not know yet when the reactor would be ready to restart.
The No. 4 reactor at the plant, located some 380 km from Tokyo, was brought back online last Friday.
Shortly after, Kansai said it discovered an 8-liter pool with traces of the contaminated water across the floor, indicating that a total of 34 liters had managed to spill. This amounts to about 64,000 becquerels of radioactive waste.
The 30-year-old No. 4 reactor at Takahama has been idle since the 2011 shutdown, following a decision to take all Japanese reactors offline for scheduled backups. Takahama’s No. 3 reactor was activated earlier in January. Another two reactors at the Kyushu Electric Power Co.’s Sendai plant were restarted last year.
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