Related Questions

Heavy water is used as a moderator in a nuclear reactor. The function of the moderator is
A to control the energy released in the reactor
B to absorb neutrons and stop the chain reaction
C to cool the reactor
D to slow down the neutrons to thermal energy
Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is
A Heavy water
B Graphite
C Carbon dioxide
D No moderator is needed
In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be
A Greater than 1.0
B Less than 1.0
C Equal to zero
D Equal to 1.0
__________ moderator is used in a fast breeder reactor.
A Heavy water
B Graphite
C No
D Beryllium
Pure oxide refractories are generally monocrystaliine in nature and are self bonded __________ bricks are generally used as moderator in nuclear reactors.
A Beryllia
B Carborundum
C Corundum
D Thoria
Which of the following may not need a moderator?
A Candu Reactor
B Fast Breeder Reactor
C Homogeneous Reactor
D none of the mentioned
Which of the following is used as a moderator in nuclear reactor?
A Thorium
B Graphite
C Radium
D Ordinary water
In boiling water reactor, moderator is
A Coolant itself
B Ferrite rod
C Graphite rod
D Liquid sodium metal
A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to
A Slow down the speed of fast moving neutrons
B Control the reaction
C Reduce the temperature
D Extracts heat from nuclear reaction
A moderator
A Absorbs neutrons
B Does not absorb neutrons
C Accelerates neutrons
D None of these

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