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← ScienceWhich phenomenon prevents sustained fusion within fission reactor fuel rods?
A)Insufficient isotopic binding energies✓
B)Excessive neutron production rates
C)Moderator neutron absorption cross-sections
D)Gamma radiation-induced material degradation
💡 Explanation
Fusion requires overcoming the Coulomb barrier with isotopes exhibiting substantial binding energy; in conventional fission fuel rods, isotopes like Uranium-235 prioritize nuclear fission because insufficient energy input to overcome repulsive forces prevents fusion, therefore fusion is suppressed rather than facilitated in operating reactors.
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