Which of the following materials is used to control the rate of neutron production in a nuclear reactor?
boron rods
concrete shield
graphite rods
uranium rods
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In a nuclear reactor, boron rods or cadmium rods are used as control rods to control the rate of neutron production, which if not controlled, can lead to explosion.
Explanation
This is given by the multiplication factor K which is unity (1) for sustained energy production. If K exceeds unity control, then rods made of Boron or Cadmium are inserted into the reactor core up to desirable length. The rods are ready to absorb neutrons, and therefore the nuclear reaction can be controlled by bringing the multiplication factor K down to unity.
In a nuclear reactor, boron rods or cadmium rods are used as control rods to control the rate of neutron production, which if not controlled, can lead to explosion.
Explanation
This is given by the multiplication factor K which is unity (1) for sustained energy production. If K exceeds unity control, then rods made of Boron or Cadmium are inserted into the reactor core up to desirable length. The rods are ready to absorb neutrons, and therefore the nuclear reaction can be controlled by bringing the multiplication factor K down to unity.
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