Fuel. Fuel assemblies with innovative REMIX fuel have entered the final 18-month round of pilot operation tests. Instead of conventional natural uranium enriched to the required level, the fuel contains a mixture of regenerated uranium and plutonium obtained from spent VVER reactor fuel. In the future, this will make it possible to involve light-water thermal reactors, now the most widely used type in the nuclear power industry, into the closed nuclear fuel cycle in addition to fast neutron reactors. This will multiply the available amount of feedstock for the fabrication of fresh nuclear fuel. Six REMIX fuel assemblies were loaded into the BN-1000 reactor at the Balakovo NPP in late 2021. The results of the first two rounds confirmed the operational safety of REMIX fuel.