Nuclear Power Engineering
A homogeneous reactor is the one, in which the

All of these
Fissile atoms are evenly distributed throughout the mass of nuclear reactor
Same substance (e.g. heavy water) is used as moderator & coolant
The fuel and the moderator is mixed to form a homogeneous material

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

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
All of these

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