COMEDK20269 May 2026Evening ShiftPhysicsNuclear PhysicsActual
The main function of cadmium used in the nuclear reactor is:
Options
- ATo capture the slow neutron produced in the nuclear reactor
- BIt slows down the fast moving secondary neutrons produced during the nuclear fission
- CIt gives energy to the secondary neutrons produced in the nuclear fission
- DIt removes the heat produced at the core of the reactor
Correct answer
A. To capture the slow neutron produced in the nuclear reactor
Step-by-step solution
In a nuclear reactor, cadmium rods are used as control rods. The primary function of control rods is to absorb or capture the slow neutrons produced during the nuclear fission reaction, thereby controlling the rate of the chain reaction. Moderators (like heavy water or graphite) are used to slow down fast-moving neutrons, while coolants (like water or liquid sodium) are used to remove the heat produced at the core. Answer: To capture the slow neutron produced in the nuclear reactor