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← ScienceWhich risk increases when controlled chain fission reactions accelerate?
A)Reduced moderator effectiveness occurs
B)Fuel cladding breach occurs✓
C)Neutron flux instability occurs
D)Loss of coolant accident starts
💡 Explanation
Fuel cladding breach risk increases because increased energy causes a rapid rise in fuel temperature, therefore exceeding material limits during uncontrolled thermal expansion, rather than changes in neutron moderation which would also affect reaction rate.
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