Nuclear Power Engineering
Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor?

Pressurised water
Boiling water
CO₂ gas cooled
Molten sodium cooled

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

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