
Japan nuclear watchdog asks Fukushima plant operator to assess risk from reactor damage
Associated PressTOKYO — A nuclear watchdog has asked the operator of Japan’s wrecked Fukushima nuclear power plant to assess possible risks resulting from damage that was found in a key supporting structure inside one of the three melted reactors. A robotic probe sent inside the Fukushima Daiichi plant’s Unit 1 primary containment chamber found that its pedestal — the main supporting structure directly under its core — was extensively damaged. Based on data collected from earlier probes and simulations, experts have said most of the melted fuel inside Unit 1, believed to be the worst hit, fell to the bottom of the primary containment chamber, but some might have fallen through to the concrete foundation — a situation that makes the already daunting task of decommissioning extremely difficult. Yuki Tanabe, a Japanese industry ministry official in charge of the Fukushima Daiichi accident response team, said government and TEPCO officials responded sincerely to the South Korean experts’ questions and that she hopes their plant visit helped their understanding about the safety of the water release plan.
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