According to Rosenergoatom Chief Executive Officer Evgeny Romanov, the firm agreed on a five-year cooperation deal with Iran, he told Russian News Agency Rossiya Segodnya (Russia Today).
Both sides came to the agreement that Roseenergoatom, a subsidiary of Rosatom, will take part in building new power stations in Bushehr.
Bushehr power station has a 1,000 MW nuclear reactor which has been generating electricity since 2014.
Russian Company Rosatom and Iran's Atomic Energy Organization signed a treaty in 2014 to build the second and third units of Bushehr Power Plant.