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← ScienceWhich outcome occurs affecting nuclear fuel pellets containing Plutonium-239 after continued neutron absorption?
A)Increased fission fragment neutron yield✓
B)Reduced criticality event likelihood
C)Enhanced heat dissipation within cladding
D)Elevated compressive stress resistance
💡 Explanation
Increased abundances of heavier Plutonium isotopes undergo fission more readily causing an increased average neutron yield; `neutron multiplication` is the mechanism. This increases neutron yield, rather than reduced criticality, because more fissile isotopes are present to react with neutrons, causing more fission events.
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