India now targets a tenfold expansion in capacity to 63,000 MW by 2032, and US, French and Russian companies are among those chasing the business.
Currently India is negotiating with US Export-Import Bank for an $8-9 billion loan to finance six Westinghouse Electric nuclear reactors.
The mega-project, the result of warming US-India ties in recent years, could open up billions of dollars of further investment in India's nuclear power sector.
The Westinghouse deal, however, is contingent on financing and Ex-Im cannot approve loans of more than $10 million.
Only two of five seats on Ex-Im's board are filled and the appointment of a third director needed to clear board decisions.
"Financing of the reactors is the critical piece; everything is down to this," said source report involved in protracted negotiations to build the reactors in Andhra Pradesh.
Indian negotiators and Ex-Im officials were trying to set the terms of the financial package in the hope that the freeze on the bank, would lift soon.
In addition to US Ex-Im, India is also seeking funding from Japan and South Korea for the reactors to be built in Kovvada, two sources familiar with the talks said.