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← ScienceWhich outcome reduces power output during Xenon-135 buildup in nuclear reactors?
A)Neutron absorption cross-section increases✓
B)Coolant flow rate decreases
C)Fuel rod warping accelerates
D)Moderator temperature coefficient decreases
💡 Explanation
Iodine-135 decays to Xenon-135, a powerful neutron absorber; therefore increased Xenon-135 concentration increases neutron absorption during nuclear fission because this process decreases the reactor's reactivity, suppressing fission chain reactions rapidly, rather than moderator impacts or flow changes.
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