What is the unique significance of the BHAVINI (Bharatiya Nabhikiya Vidyut Nigam Limited) enterprise in India’s energy sector?

BHAVINI was set up in 2003 as a special-purpose enterprise under the Department of Atomic Energy specifically to build and operate Stage-II Fast Breeder Reactors, starting with the 500 MWe Prototype Fast Breeder Reactor at Kalpakkam. Rare-earth work falls under bodies like IREL, civil nuclear diplomacy is handled by the DAE and government, and the DAE's Trombay research wing is BARC, so the other options don't fit.