Which risk increases when a nuclear reactor uses spent fuel enriched with unstable isotopes?

💡 Explanation

Increased unstable isotopes increases decay heat generation because radioactive decay releases energy as heat. Inefficient heat removal can cause fuel damage; therefore, heat generation accelerates rather than decreasing absorption or related impacts on control rods.

• Which failure mode occurs because mismatched energy levels?
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• Which outcome occurs when the wave function overlap integral is non-zero during energy minimization with Kohn-Sham density functional theory?
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