Electricity production using nuclear energy commenced in October 1969 when the two reactors at Tarapur were put into service. The Tarapur Atomic Power Station (TAPS) was built by General Electric of USA and is now in its forty-eighth year of service. Tarapur supplies the lowest cost non-hydro electric power in the country. India’s second nuclear power station came up in Rajasthan, near Kota, the first unit of which went into operation in August, 1972. The first two units at Rajasthan were built in collaboration with Cada, who pioneered reactors that could use tural uranium as fuel. They, however, required heavy water, present in extremely small quantities in ordiry water and can be extracted through complex processes.