Related Questions

Moderating material used in a thermal-reactor should be a
A Good absorber of neutrons
B Solid substance
C Poor absorber of neutrons
D None 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
Which of the following is not a good moderating material?
A Concrete
B Boron
C 18/8 stainless steel
D All of the above
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
Some large lakes in temperate latitudes have a moderating influence upon the climate of adjacent land surfaces. Such an influence may develop when ________
A The water is shallow
B The lake is high above sea level
C Prevailing out-blowing winds cross the lake in winter
D The lake is a basin of inland drainage
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
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
A thermal nuclear reactor compared to a fast breeder reactor
A Uses slower neutrons for fission
B Uses faster neutrons for fission
C Gives higher power density
D Requires less fuel to run at the same power level
Zircalloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium
A Tin, nickel, iron and chromium
B And graphite
C And copper
D None of these

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