Related Questions

__________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section.
A Nitrogen
B Hydrogen
C Helium
D Carbon dioxide
Which of the following gases has very high neutron capture cross-section, making it unsuitable as a coolant in nuclear reactor?
A N2
B He
C CO2
D H2
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
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
'Light water' used as a coolant in nuclear reactor is nothing but
A Ordinary water
B Mildly acidic (pH = 6) water
C Mildly alkaline (pH = 8) water
D None of these
An ideal coolant for a nuclear reactor should
A Be a good absorber of neutrons
B Be capable of attaining high temperature, only when it is pressurised
C Have high density, but low heat transfer co-efficient
D Be free from radiation damage and non-corrosive
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
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
Coolant present in the primary circuit of a pressurised water reactor is high pressure
A Sub cooled water
B Saturated water
C Superheated steam
D Saturated steam

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