Russian Deputy Foreign Minister Sergei Ryabkov

Russian Deputy Foreign Minister Sergei Ryabkov said Moscow is ready to continue supplies of fresh nuclear fuel for Iran, as well as to take back spent fuel from the country's reactors built with Russia’s participation.
“The Russian Federation and state nuclear energy corporation Rosatom are ready to supply fresh fuel and take spent, irradiated fuel back to Russia from all the reactors that were built and can be constructed in Iran,” Sputnik news agency quoted Ryabkov as saying.
As for the spent fuel from reactors built without Russia’s participation, “this issue is extremely complicated and we are not ready to consider it,” the Russian diplomat added.
An agreement between Moscow and Tehran on the civil use of nuclear energy and a subsequent agreement on the construction of a nuclear power plant in Iran dates back to August 1992. Bushehr, Iran's first Russian-built nuclear power plant, was launched at full capacity in the summer of 2014.
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.