A nuclear reactor is a powerful device, wherein nuclear energy is utilised for peaceful purpose. It is based upon controlled nuclear chain rection. The nuclear reaction is controlled by the use of control rods (of boron or cadmium) and moderators like heavy water, graphite, etc. The whole reactor is protect with concrete walls 2 to 2.5 meter thick, so that radiation emitted during nuclear reactions may not produce harmful effects. Read the above passage and answer the following questions:
(i) Give any two merits of nuclear reactors.
(ii) What is radiactive waste?
(iii) why do people often oppose the location site of a nuclear reactor? What do you suggest?