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← ScienceWhich 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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