More heat means more steam and less water in the reactor vessel.

在反应炉内，更多的热量将会生成更多的蒸汽，并使水越变越少。

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The diagram of the reactor vessel internals is used as a reference.

将反应堆容器与内部构件的简化图作为参考。

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Removing the fuel from the TMI-2 reactor vessel was the heart of the cleanup.

从TMI - 2反应堆中移除核燃料是清理工作的核心。

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Integral reactor systems -- including the reactor vessel itself, six steam generators, five primary coolant pumps, 12 isolation valves and more -- were stored outside for up to 18 months, exposed to highly corrosive tropical sea air and weather.

CENTERFORSECURITYPOLICY: A Chernobyl reminder just off our shores

Tuesday's explosion at the No. 2 reactor in the Fukushima complex, 150 miles north of Tokyo, for the first time raised the possibility that the key containment structure of the unit, which protects the reactor vessel and keeps dangerous radioactive materials from leaking out, had been damaged.

WSJ: Japan's Nuclear Crisis Escalates

In that accident, the lack of a containment vessel surrounding the reactor meant radioactive materials from the accident were spread far and wide.

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