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Then you have a decrease in reactor coolant inventory.

然后，反应堆冷却剂存货会减少。

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The neutron noise method has been used to monitoring reactor coolant boiling.

中子噪声用于反应堆冷却剂沸腾监测有独特的作用。

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Sheehan said one of the four reactor coolant pumps appears to have stopped working.

CNN: Pump triggers Three Mile Island reactor shutdown, NRC says

Electricity is needed to keep the reactor cores covered with coolant and to keep safe temperatures in spent fuel pools.

WSJ: Virginia Nuclear Power Plant Loses Power After Quake

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