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← ScienceWhich consequence of exceeding the control-rod insertion speed limit in a CANDU reactor is most immediate?
A)Reduced power output to turbines
B)Elevated cladding temperatures regionally✓
C)Increased risk of moderator boiling
D)Fuel rod embrittlement accelerates acutely
💡 Explanation
Elevated cladding temperatures occur because exceeding control rod speed limits causes transient overpower (TOP). This leads to rapid heat generation via increased fission rate rather than reduced generated voltage. Therefore localised can contribute to early cladding breach instead.
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