Question

The function of heavy water in a nuclear reator is
A) slow down the speed of neutrons
B) increase the speed of neutrons
C) cool down the reactor
D) stop nuclear reaction
Answer with explanation.............................

Answer 1

Ans is A) slow down the speed of neutrons

Explanation:- Basically, heavy water is used as a moderator in a nuclear reactor. It is used to slow down the neutrons being directed at the fissionable material.

It means the molecules of the moderator physically impacting the incoming neutrons and absorbing some of the Kinetic energy they possess, thus showing them down.

That the leason , neutrons have to be slowed is the most fissible materials are more likely to absorb thermal neutrons