Tokyo Electric Power's plan to freeze contaminated water at the Fukushima Daiichi nuclear power plant in Japan has been delayed. The Nuclear Regulation Authority is urging plant officials to evaluate the plan further and propose additional measures. Toyoshi Fuketa, an agency commissioner, said the "contaminated water in the trenches is the risk factor of greatest concern. ... If the flow of water cannot be stopped, there is no point in talking about ice walls."
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