Tokyo, Jan. 20 (Jiji Press)–Tokyo Electric Power Company Holdings Inc. is making preparations to reactivate the No. 6 reactor at its Kashiwazaki-Kariwa nuclear power station in central Japan as early as Wednesday, informed sources said Tuesday. The reactor at the plant in Niigata Prefecture will be brought back online for the first time in 13 years and 10 months. It will be the first TEPCO reactor to be reactivated since the March 2011 triple meltdown at the company’s tsunami-stricken Fukushima No. 1 nuclear plant in northeastern Japan. The No. 6 unit was initially slated to go back online Tuesday. But the restart was postponed after a problem was found during a test on Saturday to remove control rods for suppressing nuclear fission reactions in the reactor. An investigation revealed an error in the settings for the control rod removal prevention function, and TEPCO has since worked to confirm whether there are any similar problems. The Kashiwazaki-Kariwa plant’s seven reactors are boiling water reactors, the same type as those at the Fukushima No. 1 plant. The No. 6 and No. 7 units are advanced BWRs. All seven units were halted in March 2012. Of them, the No. 6 and No. 7 reactors passed in 2017 the Nuclear Regulation Authority’s safety screenings needed for their restart. But an effective operational ban was imposed in April 2021 after flaws in antiterrorism measures were found at the Kashiwazaki-Kariwa plant. The order remained in place until December 2023. In March 2024, the Japanese government asked the Niigata prefectural government and others for understanding for reactor reactivation at the Kashiwazaki-Kariwa plant. The prefectural government conducted a review of the Fukushima No. 1 plant accident and took necessary procedures related to restart, including holding hearings. Niigata Governor Hideyo Hanazumi in November 2025 announced his tolerance of reactivation, and the prefectural assembly then supported the governor’s decision. Still, opinions are divided among local residents over the restart. END [Copyright The Jiji Press, Ltd.]
TEPCO May Reactivate Kashiwazaki-Kariwa Reactor Wed.
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