[en] This paper presents a concept of closed fuel cycle with provision for spent fuel reprocessing. Information about reprocessing plants in Russia, including those in operation and under construction is considered. An approach to the management of long-lived radionuclides contained in spent nuclear fuel (SNF) is described. Implementation of such approach involves partitioning these radionuclides into individual fractions, which makes it possible to use, along with geological disposal, some other methods, transmutation and space removal, in particular. The limits for applicability of geological disposal are determined on the basis of a single criterion, namely, reasonable risk with regard to natural and artificial barriers for confinement of nuclides within rock massif. To attain the necessary recovery degree of long-lived radionuclides, a modification of Purex-process and technology for HLW reprocessing is proposed with use of chlorinated cobalt dicarbollyde (ChCoDiC) and phosphine oxides. This flowsheet forms the basis for the project of a high-efficiency reprocessing plant in Krasnoyarsk. (author). 9 refs