FIELD: nuclear power engineering. SUBSTANCE: method includes separation of technetium into isolated stream extracted from starting solution of fuel together with uranium, plutonium and neptunium by way of soft reduction of plutonium and neptunium, washing of technetium and uranium with extracting agent of plutonium and neptunium and with later reduction of technetium with the use of same reducing agent in presence of hydrazine. Acetylhydrausamic acid is proposed as reducing agent. EFFECT: improved separation of radionuclides under extraction reprocessing of spent fuel of atomic power plants. 4 cl, 1 dwg, 1 tbl
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