TOKYO -- The operator of Japan's stricken nuclear power plant is considering spraying water and acid by helicopters and fire trucks into its troubled reactors to prevent further radiation from leaking.

Masami Nishimura, a spokesman for Japan's nuclear safety agency, said Wednesday that Tokyo Electric Power Co. was considering the measures after a string of explosions and fires at the Fukushima Dai-ichi nuclear power plant, which was damaged by last week's massive earthquake and tsunami.

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