Japanese media said an explosion blew the roof off the reactor, raising fears of a disastrous meltdown at a nuclear plant damaged in the massive earthquake that hit Japan.

日本媒体说一次爆炸将反应堆的保护盖掀开了，加剧了人们对于日本大地震中被的破坏的核电站将带来的灾难性灾害的担忧。

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At the Fukushima plant, a suspected hydrogen explosion early Monday blew the roof off the building housing the Number 3 reactor.

星期一清早福岛核电站被疑似氢气的爆炸炸毁了3号反应堆建筑结构的外壳。

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And what about the soldiers who worked on the roof of the reactor?

NPR: 'Voices of Chernobyl': Survivors' Stories

Three thousand six hundred soldiers worked on the roof of the ruined reactor.

NPR: 'Voices of Chernobyl': Survivors' Stories