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Nuclear reactor owned by Fukushima plant operator TEPCO to shut down again hours after restart

TEPCO halted Unit 6 at Kashiwazaki-Kariwa after a control-rod alarm despite stable reactor conditions; 60% of Niigata residents oppose restarts, officials investigate cause.

  • On Thursday, a reactor at the Kashiwazaki-Kariwa plant reactivated Wednesday night was shut down hours later due to a glitch, marking TEPCO's first restart since the 2011 Fukushima disaster.
  • Plant workers halted the start-up after an alarm triggered during control-rod removal, with TEPCO saying there was no safety issue and Inagaki ordered a shutdown to ensure safety.
  • TEPCO said the glitch posed no safety issue and it was checking the situation, while Takeyuki Inagaki, Kashiwazaki-Kariwa plant chief, warned the inspection may take more than a couple of days.
  • It was not known when the restart process would resume, though the reactor could generate 1.35 million kilowatts, powering more than 1 million households in the capital region.
  • All seven reactors at Kashiwazaki-Kariwa have been dormant since a year after Fukushima, with TEPCO planning only two restarts despite 8 million kilowatts capacity, while managing a 22 trillion yen cleanup.
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Reuters broke the news in United Kingdom on Wednesday, January 21, 2026.
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