Nuclear Power Engineering
Which of the following is a moderating material used in nuclear reactor?

Cadmium
Stainless steel
Zircalloy (an alloy of zirconium and aluminium)
Graphite

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

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

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