Multiple choice

Why do we use moderator in Nuclear reactor?

  1. To increase the speed of neutrons

  2. To slow down the speed of neutrons

  3. To make the reaction fast

  4. To neutralize the ions
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Moderators are used in nuclear reactors to reduce the kinetic energy of fast neutrons produced by fission. Slowing them down increases the probability of them causing further fission in uranium-235 nuclei.

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