Nuclear Power Engineering
A control rod

Both B and C
Should have large absorption cross-section
Is generally made of boron, hafnium or cadmium
Should have small absorption cross-section

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Nuclear Power Engineering
An ideal coolant for a nuclear reactor should

Be capable of attaining high temperature, only when it is pressurised
Be a good absorber of neutrons
Be free from radiation damage and non-corrosive
Have high density, but low heat transfer co-efficient

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