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Critics have raised doubts as to whether TEPCO is seriously trying to change, and an extended blackout at the plant last week was a reminder that the crisis is not over. The blackout occurred after a rat short-circuited an outdoor switchboard, but TEPCO waited three hours to make an announcement. The outage left four fuel pools without cooling functions for up to 30 hours. TEPCO officials denied Friday that the incident posed safety threats outside of the plant, but acknowledged they lacked sensitivity about how Fukushima residents felt about the loss of power and cooling. "We learned that it only takes one rat, not even an earthquake or tsunami, to paralyze the plant," said Yukihiro Higashi, an Iwaki Meisei University engineering professor who is on a government nuclear regulatory panel overseeing Fukushima Dai-ichi safety. "People in Fukushima are under constant fear of another serious incident that requires evacuation," Higashi said. The full cleanup of the plant, which is still running on makeshift equipment, is expected to take decades. Officials said Friday that rats and snakes are frequently spotted at the plant, even inside its emergency command center. Rats are particularly a concern because they can chew on power cables and water hoses, said TEPCO official Kazuhiko Yamashita, adding that officials are considering further anti-rodent measures. The reform plans aim to use the lessons learned at TEPCO's Kashiwazaki-Kariwa plant in northern Japan. The cash-strapped utility wants to restart the plant, and officials say they have upgraded safety measures, although they have not specified any timeline. Government, parliamentary and private groups have separately published the results of their investigations into the crisis, largely blaming the disaster on botched crisis management, government-industry collusion and the tsunami.
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