The graphite rods in the nuclear reactor

A. react with U to release energy

B. produce neutrons

C. undergo combustion which triggers the nuclear fission

D. convert fast moving neutrons into thermal neutrons

Answer: Option D

Solution(By Examveda Team)

In nuclear reactor graphite rods are used as moderator or controller. Application of moderator is to slow down the neutron and controller is to control the number of neutron.