In the reactor of a nuclear power plant, name the material which is used :

(a) As a moderator

(b) To absorb radiations

(c) In the fuel rods

(d) In the control rods

(e) To carry away heat

(a) Graphite is used as a moderator.

(b) Concrete are used to absorb the radiations

(c) U-235 is used in control rods

(d) Boron can be used as control rods

(e) Liquid sodium is used to carry away heat.