Leakage of radioactive water from a plastic tank (yellow) at TEPCO's Fukushima Dai-ichi nuclear power plant at Okuma in Fukushima prefecture. (AFP Photo / TEPCO)
Fukushima operator TEPCO has been forced to switch off the cooling system at mothballed Reactor Unit 5, after it was discovered that it had been leaking water. In nine days, if the system is not repaired, temperatures will exceed dangerous levels.
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