decay heat

基本解释

Decay heat is really important.
衰变热真的很重要。
Once the reactor has shut down, there remains "decay heat" from traces of other radioactive isotopes.
一旦反应堆关闭，它仍热存在有来自其他放射性同位素踪迹的衰变热。
The decay heat must still be absorbed, however, and as a last-ditch effort the emergency core cooling system can be activated to flood the entire containment structure with water.
衰变热仍然需要被吸收，然而，作为最后的努力，紧急冷却循环系统可以用水来充满整个反应堆的外壳结构来激活。

The tsunami destroyed the diesel generators that provide power to drive the pumps that circulate the water coolant through the reactor that removes decay heat.
FORBES: Explainer: What Caused The Incident At Fukushima-Daiichi
Without an active removal of decay heat, the reactor was adding heat to the water faster than it was taking it out, and the temperature was rising.
FORBES: Explainer: What Caused The Incident At Fukushima-Daiichi
They will always have to contend with decay heat.
FORBES: Explainer: What Caused The Incident At Fukushima-Daiichi