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Standard XII
Physics
Nuclear Fusion
The purpose o...
Question
The purpose of control rods in a fission reactor is to
A
prevent oxygen from reaching the fuel
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B
absorb electrons emitted in fission proces
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C
cool down the reactor
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D
absorb neutrons generated in the fission process
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Solution
The correct option is
D
absorb neutrons generated in the fission process
Control rods absorb neutrons so that reaction in reactor remains controlled.
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Similar questions
Q.
Calcium rods are used in nuclear reactors to slow, down the neutrons taking part in the fission process.
Q.
The energy of the fast neutrons emitted in a nuclear fission reactor is approximately __________.
Q.
Consider the following statements:
In a nuclear reactor, self-sustained chain reaction is possible, because
1.more neutrons are released in each of the fission reactions.
2.the neutrons immediately take part in the fission process.
3.the fast neutrons are slowed down by graphite.
4.every neutron released in the fission reaction initiates further fission.Which of these statements are correct?
Q.
Find the number of neutrons generated per unit time in uranium reactor, whose thermal power is
100
MW. The average number of neutrons
liberated per fission is
2.5
and each fission releases an energy of
200
MeV.
Q.
A
1000
M
W
fission reactor consumes half of its fuel in
5.00
y
. How much
235
92
U
did it contain initially? Assume that the reactor operates
80
%
of the time, that all the energy generated arises from the fission of
235
92
U
and that this nuclide is consumed only by the fission process.
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