There were fears that an explosion at reactor unit 2 May have damaged the containment vessel, which increases the risk of release of hazardous radioactive materials.

有人担心2号反应堆发生的爆炸可能已经损坏了保护罩，从而增加了核泄漏的风险。

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Refuelling outage A temporary shutdown of the nuclear reactor unit for carrying out maintenance and overhaul of plant and equipment including the replacement of a portion of used fuel.

指暂时将核反应堆停止操作，以对厂房设备进行维护及大修，并包括更换部份已消耗的铀燃料组件。

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If the temperature is high enough, the core slumps to the bottom of the reactor vessel and melts through it and onto the floor of the containment unit.

如果温度高到一定程度，堆心就会落到反应堆容器的底部并将其熔穿，从而到达密封装置的底部。

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Intensely radioactive water from reactor Unit 2 is filling a nearby tunnel faster than workers can empty it, and radioactive levels of seawater near the plant increased sixfold following an aftershock on Saturday.

FORBES: Conditions May Be Deteriorating at Japanese Nuclear Power Plant

The Unit 2 reactor has been shut down since a partial meltdown in 1979.

CNN: Pump triggers Three Mile Island reactor shutdown, NRC says

The trouble began Jan. 31, when the Unit 3 reactor was shut down as a precaution after a tube break.

NPR: Calif. Reactors Might Be Retired If Restart Nixed