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AssigneeState Atomic Energy Corporation "Rosatom" On Behalf of the Russian Federation
InventorsBoris Jakovlevich Zilberman, Dmitry Viktorovich Ryabkov, Nadezhda Evgenievna Mishina, Nikolay Alekseevich Dedov, Artem Iurevich Nikolaev, Ekaterina Viktorovna Andreeva, Irina Vladimirovna Blazheva, Konstantin Viktorovich Kostromin, Andrei Yur'evich Shadrin
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The present disclosure relates to nuclear chemical, particularly radiochemical, technologies at different stages of the nuclear fuel cycle, such as the production of purified nuclear materials (uranium, zirconium) or the reprocessing of spent nuclear fuel from nuclear power stations, in which extraction processes and operations for purifying nuclear materials are used. An example method, which includes the partial decomposition of nitric acid during continuous evaporation while a solution containing a reducing agent is fed into the bottom part of an evaporator having a circulating bottoms solution, consists in that the process is carried out such that the solution is kept in the bottom part of the evaporator for more than 2 hours under the addition of an aqueous solution of formaldehyde and formic acid (hereinafter “the mixture”) or a solution of formic acid after the process has been started using the mixture.
A method for concentrating liquid radioactive waste resulted from extraction reprocessing of a burnt-up nuclear fuel of a nuclear power station, comprising:
Dependencies are inferred from the claim text.