APP IRRADIATED FUEL PROCESSING METHOD Russian patent published in 2014 - IPC G21F9/06 

FIELD: physics, nuclear.

SUBSTANCE: offered invention relates to the method of processing of APP irradiated fuel. The offered method includes joint extraction of uranium, plutonium, neptunium and technetium with 30% tributyl phosphate in hydrocarbon thinner from nitric-acid solution, washing of extract of these elements with the nitrogen acid solution , regenerative re-extraction of plutonium and neptunium with washing from uranium with technetium by complexing regenerator - aceto- hydroxamic acid, selective regenerative re-extraction of technetium by the solution of the same regenerator with hydrazine, and re-extraction of uranium. Meanwhile the re-extraction of technetium is performed in the whole unit of its re-extraction, in addition adding to the process uranium (IV) mixed with complexing regenerator and hydrazine, and the process of separation of uranium and technetium is performed until complete extraction of uranium (IV), having provided its distribution with the extract in the unit at absence in re-extract of technetium by adjusting of the relation of extractant and re-extractant of technetium during its washing from uranium.

EFFECT: increase of efficiency of re-extraction of technetium.

4 cl, 1 dwg, 5 ex