Nuclear Power Engineering
Use of molten metal as a coolant in fast breeder reactor helps in

Accelerating the reaction rate in the core
Rapid heat transfer from the core
Accelerating the neutrons
Breeding neutrons

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Nuclear Power Engineering
The main purpose of control rod in a nuclear reactor is to control the

Velocity of the secondary neutrons
Chain reaction and hence the power output by regulating the number of secondary neutrons causing fission
Emission of hazardous radiation
Conversion of fissile material into fertile material

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