反应堆操作员计算过燃料池使输入的冷却水沸腾（即冷却失效）需多少时间。

Reactor operators calculate how long it would take, once cooling is lost, for the spent fuel to boil the water it sits in.

youdao

所以，一旦球体被分离了，新的球体能够,放进去或者它能够在计算回反应堆里,如果它燃烧完了，但没有用完，或者燃料,没有全部用完。

So once the pebble is depleted a fresh pebble can be put it in or it can be re-circulated back in the reactor if its burn-up isn't all used up or the fuel isn't all used up.

youdao

所有的这些事情需要分析，和理解，在一个反应堆物理计算中。

And all these things need to be analysed and understood in a reactor physics calculation.

youdao