"This claim is completely false since nuclear reactors cannot become ‘secondhand’ to begin with," Salehi said, as quoted by the Iranian Mehr news agency.
At the same time he added that Bulgaria wanted to sell the equipment it had after the cancellation of project on construction of two reactors with Russia's Rosatom state-owned nuclear energy corporation.
The Russian-built Bushehr nuclear power plant started operating in 2011 and reached full capacity the following year.
The project for Bushehr-2 was presented by Russian nuclear experts in Tehran in September, 2014. In November, Iran signed a number of deals with Russia for the construction of two more nuclear reactors and an option for an additional six.