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A worker at the Kashiwazaki-Kariwa nuclear power plant opens a watertight door in one of the plant's reactors during a tour in August 2024. Just over a year later, the plant is close to reopening. (File photo).
Yuichi Yamazaki/Ritzau Scanpix

World's largest nuclear power plant is a big step closer to reopening

All Japanese nuclear reactors were taken out of service after a tsunami destroyed the Fukushima plant in 2011.  
21. NOV 2025 10.56
Energi
Internationalt
Sikkerhed

Local authorities have approved a partial reopening of the world's largest nuclear power plant, Kashiwazaki-Kariwa, located in Japan. This was announced by the governor of Niigata province Hideyo Hanazumi at a press conference, the news agency AFP reports on Friday.

The nuclear power plant is located in Niigata province. However, the reactivation of the power plant requires final approval from Japan's national nuclear regulatory authority.

If Kashiwazaki-Kariwa resumes operations, it will be the first time since 2011 that the operator Tepco has put a nuclear power plant into operation in Japan.

In 2011, an earthquake and then a tsunami hit the country. The nuclear power plant in Fukushima, which was run by Tepco, was severely affected. The earthquake and tsunami triggered a partial meltdown in several of the plant's reactors, resulting in radioactive releases into the areas around Fukushima - including the sea.

Subsequently, all 54 active nuclear reactors in Japan were taken out of service. Since then, 14 of them have been restarted after new and stricter safety rules were introduced in the Japanese nuclear power sector. None of them are operated by Tepco, which has been responsible for operating Fukushima and Kashiwazaki-Kariwa.

The shutdown of all nuclear power 14 years ago meant that Japan became dependent on imports of fossil fuels such as oil and gas from abroad.

Prime Minister Sanae Takaichi has said that he supports the reopening of more nuclear reactors. More domestic nuclear power will strengthen Japan's energy security and be cheaper than importing energy, the argument goes.

Currently, between 60 and 70 percent of Japan's total electricity consumption is covered by imported energy sources, writes the news agency Reuters. The Fukushima accident in 2011 is considered, along with the Chernobyl accident in 1986, to be one of the worst nuclear accidents ever.

/ritzau/

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