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← ScienceWhich risk substantially increases when control rods fail?
A)Uncontrolled chain reaction✓
B)Reduced moderator efficiency
C)Increased neutron absorption
D)Fuel enrichment decreases
💡 Explanation
An uncontrolled chain reaction results from control rod failure because neutron moderation via neutron absorption drastically decreases; therefore, fission rate increases catastrophically rather than remaining stable by controlled collisions.
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