In two to three sentences, explain the importance of the following in a nuclear reactor:

control rods

containment structure

a moderator

(1) Control rods of the nuclear reactor are important in controlling the fission rate of plutonium and uranium during the reaction.

(2) Containment structure is a protection for those working near the reactor in order to lessen the radiation exposure.

(3) Moderator is used to moderate the extent of the reaction