• Kyodo

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Output at a nuclear power plant was lowered Sunday morning due to trouble with a turbine-control device, the plant’s operator said.

Tokyo Electric Power Co. said the malfunction of the 1.1-million-kw No. 3 reactor at the Kashiwazaki-Kariwa nuclear power plant occurred at around 7:37 a.m. The turbine control-device returned to normal at 8:10 a.m. following a cut in power output.

There were no radioactive leaks, it said.

The trouble lowered the degree of vacuum in the reactor’s turbine condenser that cools steam, bringing down heat efficiency, the company said.

The turbine condenser is normally kept near vacuum.

The cause of the accident is under investigation.

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