GENERAL KNOWLEDGE

Detailed explanation-1: -The correct answer is convert fast moving neutrons into thermal neutrons. 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.

Detailed explanation-2: -They reduce the speed of neutrons and allow a nuclear reaction to be sustained. They also perform an important safety function by providing the structure through which CO2 gas flows to remove heat from the nuclear fuel and the control rods used to shut down the reactor are inserted.

Detailed explanation-3: -There are two very basic nuclear requirements for moderator graphite, or, for that matter, any moderator material. First, it must be effective in slowing fast neutrons down to thermal energies, and, second, it must have a small cross section for neutron absorption.

Detailed explanation-4: -3. Which parts function is to reduce the energy of fast neutrons to thermal neutrons in nuclear power plant? Explanation: Function of moderator is to reduce the energy of fast neutrons to thermal neutrons.

Detailed explanation-5: -Light water Hydrogen works well as a neutron moderator because its mass is almost identical to that of a neutron. This means that one collision will significantly reduce the speed of the neutron because of the laws of conservation of energy and momentum. In addition, light water is abundant and fairly inexpensive.