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
Which of the following is used as a moderator in nuclear reactor?
A Thorium
B Graphite
C Radium
D Ordinary water
Which set of materials is used as a moderator in nuclear reactor?
A Zircalloy & berrylium
B Zircalloy & heavy water
C Zirconium & berrylium
D Heavy water & berrylium
Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has
A High neutron absorption cross-section
B Low moderating efficiency
C High neutron scatter cross-section
D Low neutron absorption cross-section
CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the
A Specific fuel consumption is very low due to the use of heavy water
B Fuel cost is much lower than that used in pressurised water or boiling water reactor
C Heavy water is used both as coolant as well as moderator
D Both B and C
If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.
A Critical
B Breeder
C Fertile
D Heterogenous
__________ moderator is used in a fast breeder reactor.
A Heavy water
B Graphite
C No
D Beryllium
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 case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.
A Semi-batch
B Tubular
C Batch
D Back-mix
Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of
A Concrete
B Steel
C Zircalloy
D Graphite

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