Explanation:

 The Rajasthan Atomic Power Project (RAPP), located in Rawatbhata in the north Indian state of Rajasthan, currently has six pressurised heavy water reactor (PHWR) units operating with a total installed capacity of 1,180MW.

The Nuclear Power Corporation of India (NPCIL), the operator of the plant, is increasing the existing capacity of the plant by constructing two more reactors known as Units 7 and 8.

The first reactor was commissioned in December 1973 with an installed capacity of 100MW. The second reactor of 200MW capacity was synchronised to the grid in April 1981. The third and fourth reactors, each of 220MW capacity, began commercial operations in June 2000 and December 2000 respectively.