Given the crucial need to cool temperatures in the spent fuel pool and other parts of the reactors, "I think it is a battle against time", Mr Amano said.

鉴于目前亟需冷却废燃料棒储存池和反应堆其它部分，“我认为这是一场与时间赛跑的战斗，”天野之弥表示。

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All of the rods from the fuel core were put into the spent fuel pool above the reactor at that time.

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Engineers and workers so far have managed to stave off a complete meltdown in Fukushima Daiichi's reactors 1-3 and in the spent fuel pool of unit 4.

CNN: STORY HIGHLIGHTS

According to a report by the Congressional Research Service, there are more fuel rods in the Unit 4 fuel pool than at any of the five other reactors.

FORBES: New Video From Fukushima Shows Containment Vessel Dome Amid Debris