question_answer

What is the function of moderator in a nuclear reactor?

A) It absorbs the extra neutrons released during the fission reaction to bring about controlled chain reaction

B) It slows down the speed of fast moving neutrons released during fission reaction to carry out further fission reaction

C) It transfers heat produced in the nuclear reactor to the water in heat exchanger

D) It is used to run the steam turbine

E) None of these