question_answer

Heavy water is used as moderator in a nuclear reactor. The function of the moderator is [CBSE PMT 1994; EAMCET (Engg.) 1995; AFMC 2002; DPMT 2003; DCE 2004]

A)            To control the energy released in the reactor

B)            To absorb neutrons and stop chain reaction

C)            To cool the reactor faster

D)            To slow down the neutrons to thermal energies