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← ScienceWhich outcome occurs when uranium enrichment falls too low?
A)Self-sustaining chain reaction ceases✓
B)Neutron flux intensity increases
C)Radioactive decay lifetime shortens
D)Fuel rod thermal output increases
💡 Explanation
The fission chain reaction needs sufficient fissile material. Lower enrichment reduces neutron regeneration via induced fission; therefore, the chain reaction ceases because neutron multiplication decreases during the propagation, rather than creating energy from uncontrolled decay.
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