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

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

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

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

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Nuclear Power Engineering
A boiling water reactor is the one, in which the

Fuel and the coolant are thoroughly mixed to form a homogeneous solution
Pressurised water is pumped into the core
Coolant water, after being heated in the reactor core, generates steam in a boiler
Coolant water is allowed to boil in the core of the reactor

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