Friday is the closing date for foreign companies to make applications.
"We have received an affirmative response from Rosatom and Areva," said Vladimir Semashko, the ex-Soviet republic's first deputy prime minister.
He said the Belarusian government would decide within 10 days what kind of agreement would be signed.
"It will be either an intergovernmental or a tender agreement," he said.
Belarus plans to build a nuclear power plant with a capacity of 2,000 MW, with the first unit to come online in 2016 and the second in 2018. The plant is expected to have Generation III water-moderated reactors.
Belarus has sent invitations to Rosatom, Areva and the U.S.-Japanese company Westinghouse-Toshiba, the three main producers of the equipment, to participate in the tender.
The ministry previously said it had not received an official response from Westinghouse.