decay heat

基本解释

Decay heat is really important.
衰變熱真的很重要。
Once the reactor has shut down, there remains "decay heat" from traces of other radioactive isotopes.
一旦反應堆關閉，它仍熱存在有來自其他放射性同位素蹤跡的衰變熱。
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.
衰變熱仍然需要被吸收，然而，作爲最後的努力，緊急冷卻循環系統可以用水來充滿整個反應堆的外殼結搆來激活。

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