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Which risk increases within reactor shielding when neutron flux decays?

A)Shielding embrittlement accelerates over time
B)Gamma radiation intensity diminishes slowly
C)Heat load from daughters increases
D)Neutron activation cross-section remains level

💡 Explanation

Gamma intensity diminishes slower following neutron decay because of the **buildup effect** of long-lived radioactive daughter products. Therefore, gamma radiation remains a threat longer, rather than a quick drop with neutron flux alone.

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