Question

Cadmium and Boron rods are used in a nuclear reactor to

• A. Slow down the neutrons
• B. Absorb excess number of thermal neutrons
• C. Speed up neutrons
• D. Absorb fast neutrons

Answer 1

The correct option is B Absorb excess number of thermal neutrons

Cadmium and boron are used as control rods. They absorb excess number of thermal neutrons released and bring the fission reaction under control.

Hence, option $\left(B\right)$ is correct.