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← ScienceWhich risk increases in a nuclear power plant when fission products accumulate?
A)Neutron absorption cross-sectional area rises✓
B)Coolant boiling point decreases linearly
C)Enriched Uranium criticality threshold increases
D)Fuel rod structural integrity dramatically increases
💡 Explanation
Accumulated fission products increase neutron absorption, reducing available neutrons to sustain the chain reaction. This phenomenon is known as neutron poisoning, because the neutron flux decreases, therefore, the reactor's reactivity decreases and output is reduced; rather than increasing reactivity or aiding materials.
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