There was a real possibility of a leak in the No 4 reactor container, which houses the nuclear fuel rods, according to Murray Jennex, a professor at San Diego State University in California.

圣地牙哥州立大学副教授杰尼克斯说，燃料棒外面的4号反应堆的外壳相当有可能出现裂缝。

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He said the plant operator confirmed there was no damage to the steel container housing the reactor.

他说，电站的操纵职员确认，保护反应堆的钢制防护罩没有损坏。

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Reactor through the container structure design and parameter configuration, realize the process requirements of the heating, cooling, evaporation and low speed mixing function.

反应釜通过对容器的结构设计与参数配置，实现工艺要求的加热、蒸发、冷却及低高速的混配功能。

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TOKYO Japan's nuclear crisis showed signs of spinning out of control Tuesday, after officials reported a third explosion and warned of possible damage to a critical reactor container at the troubled Fukushima Daiichi nuclear-power complex.

WSJ: Japan's Nuclear Crisis Escalates

But the Chernobyl cleanup plans were also simpler, experts say: Build a thick concrete container around the shattered reactor and move people away permanently.

WSJ: Japan to Take 40 Years to Dismantle Fukushima Nuclear Plant

The telltale sign of trouble at reactor No. 2, Tokyo Electric Power Co. officials said, was that pressure had dropped in the "suppression pool" the part of the reactor that converts steam to water at the bottom of the container.

WSJ: Japan's Nuclear Crisis Escalates