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Which risk increases when boosting the reactor power levels after a SCWR coolant phase transition?

A)Neutron flux oscillation
B)Coolant pump cavitation
C)Moderator reactivity instability
D)Fuel rod cladding rupture

💡 Explanation

Neutron flux oscillation risk increases because sudden density changes due to phase transition alter the neutron moderation and absorption characteristics, leading to reactivity fluctuations; therefore, oscillations are more prominent, rather than other issues with constant volume or slower onset.

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