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

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

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Nuclear Power Engineering
Plutonium

Both A & B
Neither A nor B
Has much lower melting point (640°C ) compared to thorium (1690°C)
Is recovered from spent fuel from thermal nuclear reactor

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