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Which outcome is certain to occur when an over-pressurized reactor core loses coolant?

A)Rupture disk releases excess pressure
B)Spontaneous criticality from density increase
C)Steam explosion due to rapid boiling
D)Moderator collapses, halting chain reaction

💡 Explanation

A steam explosion results because rapid boiling leads to a massive volumetric expansion, therefore fuel will melt rather than A happening due to the extreme heat, and uncontrolled phase transitions dominate neutronics.

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