The cabinet cleared the plan today, said Union Minister Piyush Goyal after attending a meeting chaired by Prime Minister Narendra Modi.
The plan to fast-track the domestic nuclear power programme also marks a response to the near collapse of Westinghouse. Talks were on with the US reactor maker to build six its AP1000 reactors in India. The firm, owned by Japan's Toshiba, filed for bankruptcy in March, raising doubts about whether it can complete the India deal.
India gets its bulk of electricity by burning coal. Nuclear power accounts for just two per cent of the country's needs. For years, India had been pushing to develop indigenous technology in nuclear power. Currently the country generates 6,780 MW nuclear power -- building capacity for another 6,700 MW is in the pipeline.
Out of India's 22 operational nuclear reactors, 18 use heavy water - a safer and more efficient technology. But most of the reactors have lower capacity. The new reactors will generate 700 MW power each.
A heavy water reactor uses natural uranium as fuel unlike light water reactors, which use enriched uranium. Heavy water reactors are safer and more efficient and get more output for the same quantity of uranium than one using normal water. They can also be fuelled without shutting down, which helps them run for long runs without a break.
India had imported the PHWR (Pressurized heavy-water reactor) technology from Canada, but after the 1974 nuclear explosion at Pokharan, when Canada abandoned all cooperation, Indian scientists mastered the making of these reactors, which come in three variants 220 MW, 540 MW and 700 MW units.