• Graphite is used as a moderator.
  • The purpose of the moderator is to absorb some of the kinetic energy of the neutrons to slow them down.
  • This is because slow neutrons are more easily absorbed by uranium 235 nuclei.


Control rods:

  • Made of boron or cadmium.
  • The purpose of the control rods is to absorb neutrons and completely remove them from the fission process.
  • Helps adjust the rate of nuclear fission in the reactor.