The BN-800 fast-neutron reactor at the Beloyarsk power plant will be fully converted to MOX fuel by 2022. The transition will start in the first half of 2021, when MOX fuel will be in about a third of the active zone, and will be completed in 2022. Since its launch in 2015, the reactor has used a combination of HEU and MOX fuel.
The fuel fabrication plant at the Mining and Chemical Combine in Zheleznogorsk, also launched in 2015, delivered the first batch of 18 serially-produced MOX fuel assemblies to BN-800 only in August 2019. Before that, the reactor used MOX fuel fabricated at experimental facilities.