The head of Russia's state nuclear company said a deal would be signed on December 11 for the construction of at least 12 more reactors for Indian nuclear power plants.
Rosatom chief Sergei Kiriyenko, who is accompanying Russian President Vladimir Putin on an official visit to New Delhi, said general framework agreements were already signed to provide equipment and materials for construction of third and fourth units at the Kudankulam plant in southern India.
Rosatom has already constructed the first two reactors at Kundankulam.
Kiriyenko said agreements to build at least a dozen more reactors would be signed when Putin and Indian leader Narendra Modi finish their talks.
Efforts to boost energy cooperation are a big part of Putin's trip to India.
Russian oil company Gazprom Neft is also expected to seek new deals with India's Oil and National Gas Corporation Ltd for development of Russian fields in the Arctic.
Its parent, state-controlled Gazprom, is hoping to reach an agreement with India's GAIL for deliveries of Russian liquefied natural gas (LNG).