In a concerning development, Japan has suspended operations at the Kashiwazaki-Kariwa Nuclear Power Plant, the world’s largest nuclear facility, just hours after its restart. The incident has reignited concerns about the safety and reliability of nuclear power in the country, as it grapples with the lingering legacy of the Fukushima disaster.
The alarm was triggered “during reactor-start-up procedures” at the plant, located northwest of Tokyo, according to Takashi Kobayashi, a spokesperson for the Tokyo Electric Power Company (Tepco). While the reactor remained “stable” and there was “no radioactive impact outside,” the sudden suspension has raised eyebrows and prompted an investigation into the cause.
This latest setback comes as Japan has been working to revive its nuclear industry, which was devastated by the Fukushima meltdown in 2011. The disaster, triggered by a powerful earthquake and tsunami, forced the country to shut down all of its 54 nuclear reactors, with radiation leaks leading to the evacuation of over 150,000 people.
In the years since, Japan has struggled to regain public trust and restart its nuclear plants, with only 15 of its 33 operable reactors back in operation as of 2015. The Kashiwazaki-Kariwa plant, which has the world’s largest installed capacity, was seen as a crucial step in this process, with reactor number six restarting just a day later than planned due to a previous alarm malfunction.
However, the latest incident has reignited concerns among local residents, who have long expressed safety worries about the plant. Last week, a small crowd gathered outside Tepco’s headquarters to protest, while hundreds more demonstrated outside the Niigata prefectural assembly in December.
The suspension also raises questions about Japan’s broader nuclear ambitions, as it seeks to reach net-zero emissions by 2050. Prior to Fukushima, nuclear power accounted for nearly 30% of the country’s electricity, with plans to increase this to 50% by 2030. The setback at Kashiwazaki-Kariwa could further delay these goals and complicate Japan’s energy transition.
Tepco, the operator of the Fukushima plant, has said it is “currently investigating the cause” of the latest incident and did not indicate when operations would resume. Meanwhile, the seventh reactor at Kashiwazaki-Kariwa is not expected to be turned on until 2030, and the other five could potentially be decommissioned, leaving the plant with significantly reduced capacity.
As Japan navigates the complex and emotionally charged landscape of nuclear power, the suspension at the world’s largest plant serves as a stark reminder of the challenges it continues to face in rebuilding public trust and confidence in this contentious energy source.
