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Tepco resumes commercial operations at Niigata plant for first time in 14 years

The No. 6 unit is the first TEPCO reactor to enter commercial service in 14 years, easing summer supply concerns and reducing fuel costs.

  • Tokyo Electric Power Company Holdings began commercial operation at the No. 6 unit of the Kashiwazaki-Kariwa nuclear plant on Thursday, marking the first time in 14 years that a TEPCO-operated reactor has entered commercial operation.
  • TEPCO is prioritizing the Kashiwazaki-Kariwa plant to reduce fuel costs from thermal power generation, while managing decommissioning of the Fukushima Daiichi complex and massive compensation costs from the 2011 nuclear accident.
  • The Nuclear Regulation Authority gave the green light for commercial operation after clearing final safety checks, issuing a certificate to station head Inagaki Takeyuki on Thursday afternoon.
  • With the regulator's certificate issued, TEPCO began sending electricity on a commercial basis to its grid system covering the Greater Tokyo Area and the eastern part of Shizuoka Prefecture.
  • Located about 220km from Tokyo, the seven-unit Kashiwazaki-Kariwa complex has a maximum output of 8.21 million kilowatts, supporting government efforts to secure stable energy supplies and address expected summer electricity demand.
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Lean Right

The centre of Kashivazaki-Kariwa, with a capacity of over 8,000 MW, "supplys energy to the metropolitan area of Tokyo and the eastern part of Shizuoka province", according to the management company.

·Portugal
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Center

The Kashiwazaki-Kariwa nuclear power plant, the largest in the world by capacity and operated by the Japanese company TEPCO, began this Thursday to supply electricity after more than 14 years stopped, has confirmed the company on its website.Continue reading....

·Barcelona, Spain
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The Japanese Kashiwazaki-Kariwa nuclear power plant, the largest in the world, started supplying electricity yesterday after having been shut down for more than 14 years. "At 16:00 (07:00 in Lisbon), on 16 April, we received the pre-use confirmation certificate and the Nuclear Regulatory Authority's pre-use inspection approval certificate and resumed commercial operations," TEPCO, the company that runs the power plant, explained.

·Funchal, Portugal
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udgtv broke the news on Thursday, April 16, 2026.
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