TOKYO (Reuters) - The operator of Japan's crippled Fukushima nuclear plant said on Monday that pumps used to inject water to cool damaged reactors were hit by power failure, but that a backup system kicked in immediately.
Tokyo Electric Power Co , or Tepco, pours hundreds of tonnes of water a day over the reactors to cool them after a devastating earthquake and tsunami in March 2011 caused nuclear fuel to melt down. Tepco stores the radioactive runoff in tanks above ground.
(Reporting by Mari Saito; Editing by Shinichi Saoshiro)
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