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Pumps cooling Fukushima reactors hit by power failure, backup kicks in

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 <9501.T>, 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)