Tepco reports alert system error at Kashiwazaki-Kariwa plant

Tokyo Electric Power Company (Tepco) announced that an alert system failed to activate during a test operation for restarting the No. 6 reactor at its Kashiwazaki-Kariwa nuclear plant. The issue was detected on Friday, raising concerns about the planned restart on Tuesday.

Tokyo Electric Power Company Holdings (Tepco) revealed on Saturday that an alert system malfunctioned during a test operation on the previous day for the restart of the No. 6 reactor at its Kashiwazaki-Kariwa nuclear plant in Niigata Prefecture. The system is intended to activate when a control rod is withdrawn from the reactor while another rod is already out.

The issue was confirmed at 12:36 p.m., prompting an immediate halt to the test. Tepco is investigating the cause, noting that any delay in resolution could jeopardize the reactor's scheduled restart on Tuesday. This would mark the first restart of a Tepco nuclear reactor since the March 2011 accident at the tsunami-damaged Fukushima No. 1 plant.

The malfunction revives concerns over nuclear safety protocols. Tepco is conducting a thorough probe and preparing reports for regulatory authorities.

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Niigata Governor Hideyo Hanazumi announces restart of Kashiwazaki-Kariwa nuclear plant at press conference, with facility image projected behind.
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Niigata Governor Hideyo Hanazumi approved the restart of the world's largest nuclear plant, the Kashiwazaki-Kariwa facility, on Friday. This marks the first restart for operator TEPCO since the 2011 Fukushima disaster. The move supports Japan's goals to reduce fossil fuel reliance and achieve carbon neutrality.

Tokyo Electric Power Company restarted reactor No. 6 at the Kashiwazaki-Kariwa nuclear plant after about 14 years, but suspended operations just six hours after achieving a critical state due to an alarm. This event, the company's first restart since the 2011 Fukushima disaster, highlights ongoing safety concerns in Japan's nuclear revival.

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Tokyo Electric Power Company restarted its No. 6 reactor at the Kashiwazaki-Kariwa nuclear power plant in Niigata Prefecture on Wednesday evening. This marks TEPCO's first reactor restart since the 2011 Fukushima accident, though local residents remain divided. Commercial operations are slated for February 26.

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