imports. The use of heavy-water reactors has been particularly attractive for the nation because it allows uranium to be burnt with little to no enrichment. India has also done a great amount of work in the development of a thorium-centered fuel cycle. While uranium deposits in the nation are extremely limited, there are much greater reserves of thorium, and it could provide hundreds of times the energy with the same mass of fuel. The fact that thorium can theoretically be utilized in heavy water reactors has tied the development of the two. A prototype reactor that would burn uranium-plutonium fuel while irradiating a thorium blanket is under construction at the Madras/Kalpakkam Atomic Power Station. Uranium used for the weapons program has been separate from the power program using uranium from scant indigenous reserves. Hydro electricity India is endowed with economically exploitable and viable hydro potential assessed to be about 125,570 MW at 60% capacity factor. India ranked fourth globally by underutilized hydropower potential. In addition, 6,780 MW in terms of installed capacity from Small, Mini, and Micro Hydel schemes have been assessed. Also, 56 sites for pumped storage schemes (PSS) with an aggregate installed capacity of 94,000 MW have been identified for catering to peak electricity demand and water pumping for irrigation needs. It is the most widely used form of renewable energy but the economically exploitable hydropower potential keeps on varying due to technological developments and the comparable cost of electricity generation from other sources. The hydro-electric potential of India ranks 5th in terms of exploitable hydro-potential on the global scenario. The installed capacity of hydropower is 45,315 MW as of 31 May 2018. India ranks sixth in hydro electricity generation globally after China, Canada, Brazil, USA, and Russia. During the year 2017-18, the total hydroelectricity generation in India is 126.123 billion kWh which works out to 24,000 MW at a 60% capacity factor. Till now, the hydroelectricity sector is dominated by the state and central government-owned companies but this sector is going to grow faster with the participation of the private sector in developing the hydro potential located in the Himalaya mountain ranges including northeast of India. However the hydropower potential in central India forming part of Godavari, Mahanadi and Narmada river basins has not yet been developed on a major scale due to potential opposition from the tribal population. Pumped storage schemes are perfect centralized peaking power