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← ScienceWhich risk increases when cooling spent nuclear fuel rods?
A)Reactivation of chain fission reaction
B)Formation of microbubbles worsens cooling
C)Accelerated alpha decay of plutonium✓
D)Enhanced structural lattice phonon interactions
💡 Explanation
Increased alpha decay rates occur because the Arrhenius equation shows that lower temperatures slow annealling; therefore accumulated defects concentrate and accelerate decay—rather than causing structural changes, which rely on temperature gradients for phase transitions.
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