Rosatom plans regarding the construction of sodium-cooled fast neutron reactors remain uncertain. After the government postponed the work on BN-1200 reactor in 2018, the developers updated the design to make the reactor more competitive. The new design is known as BN-1200M. The first BN-1200M unit is expected to be deployed at the Beloyarsk NPP in the Urals, which operates BN-600 and BN-800 reactors. The developers, as well as the regional authorities hope that the construction will begin in 2027 and that the reactor will begin operations in 2034.

Rosatom's long-term plan, however, assumes that a new fast-neutron reactor of an unspecified type will not begin operations at Beloyarsk NPP until 2038 (with one more unit added in 2040). The plan includes new fast-neutron reactors (again, of an unspecified type) that are expected to begin operations in Seversk in 2037-2039 (two reactors) and at a new Sibirskaya NPP in a not-yet-selected site in the Irkutsk region in 2041-2042 (two reactors). All these reactors are expected to have a power of 1255 MWt, suggesting that they will be the BN-1200M or a similar design. It is possible, however, that these will be lead-cooled reactors, based on the Brest-OD-300 design. Some Rosatom materials mention a lead-cooled BR-1200 reactor. The construction of Brest-OD-300 is underway in Seversk and it is expected to begin operations in 2028.

The uncertainty with the reactor type seems to suggest that despite the modifications, Rosatom still has questions about the viability of the BN-1200M design. Another sign of this is the cancellation of the Krasnoyarskaya NPP project, which called for the construction of four BN-1200M units in 2037-2042.