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 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
The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is
A Backmix reactor
B Plug flow reactor
C Series of CSTR
D PFR in series
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
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
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
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
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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