Question

Use of Cadmium rods in Controlled chain reaction is:

• A. To absorb the neutrons
• B. To slow down the reaction rate
• C. To absorb the uranium atoms
• D. a and b are correct

Answer 1

The correct option is D a and b are correct

The nucleus of cadmium is very useful as a neutron absorber because of its high cross section (high atomic radius), and it does not deform easily in the hot core of a nuclear pile. As it absorbs excess neutrons, reducing the no. of projectiles in the reactor which helps us in controlling the reaction.