High temperatures in the core lead some to believe that the core is uncovered; others do not trust the temperature readings.

堆芯中的高温让一些操作员认为堆芯已完全暴露；其他一些人并不相信温度的读数。

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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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Now the pebble bed reactor has the same basic safety features as a high temperature prismatic reactor in a sense that it has a meltdown free core.

现在，卵石层反应堆有相同的基本，安全特征和高温棱柱反应堆一样，因为它有一个熔化的核心。

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