Nuclear Power Engineering
A control rod

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

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Nuclear Power Engineering
Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher

Melting point, hence can be subjected to higher temperature
Density ; hence core volume for a given power output would be smaller
All of these
Resistance to effects of irradiation

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