Related Questions

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
Which is used as a coolant in nuclear reactor due to its high capture cross-section?
A H2
B N2
C He
D CO2
A nuclear reactor is said to be critical when the neutron population in the reactor core is
A Rapidly increasing leading to the point of explosion
B Decreasing from the specified value
C Reduced to zero
D Constant
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
A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be
A Stable under nuclear radiation
B Corrosion resistant
C Good thermal conductor
D All of these
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
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
The sensing element in the control system of nuclear reactors measures the _________ of the neutron flux in the reactor.
A Temperature
B Volume
C Density
D None of these
'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

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