定义 中文名称： 反应堆堆芯 英文名称： reactor core 定义： 反应堆压力容器内进行裂变链式反应的区域。堆芯通常由燃料组件、中子源、可燃毒物、慢化剂(根据需要)和控制棒组件等组成。它们之间流过冷却剂，以带出裂变反应
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之前放射性的碘、铯的释放表明至少一个反应堆堆芯已被释放。
Previous releases of radioactive iodine and caesium had shown that material from the core of at least one reactor has been released.
危险的是电厂非常热的热反应堆堆芯必须持续冷却24到48个小时。
The danger is, the very thermally hot reactor cores at the plant must be continuously cooled for 24 to 48 hours.
到那时，反应堆堆芯的燃料温度会下降，且也不会导致周围水温升高。
At that point, the fuel at the core of the reactors would have dropped in temperature and no longer be capable of boiling the surrounding water.
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