In many circumstances it is very important to have control of a fission nuclear chain reaction with a moderator. A moderator must therefore have a profound effect on the motion of
A) electrons.
B) protons.
C) neutrons.
D) photons.

Question

Quizplus · Accepted Answer

Moderators in nuclear reactors are used to slow down neutrons without capturing them, which increases the probability of these neutrons to cause further fission in the fuel. This is essential for sustaining a controlled nuclear chain reaction. Electrons, protons, and photons are not directly involved in the fission process in the same way as neutrons.

In Many Circumstances It Is Very Important to Have Control