To control fission process of the reactor, which of the following material is used?
A
Graphite
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B
Cadmium
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C
Gold
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D
Uranium
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Solution
The correct option is C Cadmium The function of a control rod is to absorb (capture) the neutrons. cadmium, boron and steel rods are used as control rods in a nuclear reactor. They regulate the net rate of neutron production and hence they control the intensity of fission process.