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← ScienceWhich outcome occurs with increased operation cycles due to thermal ratcheting in a nuclear reactor?
A)Creep strain accumulates in fuel cladding✓
B)Void fraction in the coolant decreases
C)Moderator neutron absorption significantly increases
D)Reactivity feedback becomes promptly negative
💡 Explanation
Creep strain increases because thermal ratcheting cyclically causes incremental plastic deformation from repeated thermal stress beyond the yield point. Therefore, cladding steadily weakens under load, rather than other changes in other reactor parameters, because of the material properties under cycling conditions.
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