Question

Which of the following is used as a moderator in nuclear reaction?

• A. plutonium
• B. cadmium
• C. uranium
• D. heavy water

Answer 1

Answer: (D)

heavy water

Answer 2

A neutron moderator is a medium that reduces the speed of fast neutrons, thereby turning them into thermal neutrons capable of sustaining a nuclear chain reaction involving uranium-$235$. Heavy water can serve as a neutron moderator in a nuclear reactor, which slows down fast particles and encourages the fission reaction