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2 542 317

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IPC

C01G43/25(2006-01-01)

G21C3/62(2006-01-01)

(21) (22)

Application

2013129188/05, 2013-06-25

(24)

Start date

2013-06-25

(22)

Actual filing date

2013-06-25

(45)

Published

2015-02-20

(72)

Inventor

Kuljako Jurij MikhajlovichTrofimov Trofim IvanovichPerevalov Sergej Anatol'EvichSamsonov Maksim DmitrievichMjasoedov Boris FedorovichFedoseev Aleksandr MikhajlovichBessonov Aleksej Anatol'EvichShadrin Andrej Jur'EvichVidanov Vitalij L'VovichVinokurov Sergej Evgen'Evich

(73)

Holder

Rossijskaja Federatsija, Ot Imeni Kotoroj Vystupaet Gosudarstvennaja Korporatsija Po Atomnoj Ehnergii

METHOD OF OBTAINING URANIUM DIOXIDE POWDER Russian patent published in 2015 - IPC C01G43/25 G21C3/62

Abstract RU 2542317 C2

FIELD: chemistry.

SUBSTANCE: invention relates to radiochemical technology and can be applied for obtaining uranium dioxide powder, which is used in production of ceramic tablets of uranium oxide nuclear fuel. Method of obtaining uranium dioxide powder consists in heating mixture of uranylnitrate solution and hydrazinehydrate, taken in not less than double molar excess relative to uranylnitrate, to temperature 80-95°C in reactor with water lock, the following temperature exposure of obtained suspension of uranylhydronitrate until hydrated uranium dioxide is formed, filtration and incineration of hydrated uranium hydroxide in non-oxidising atmosphere at temperature ≥280°C.

EFFECT: invention ensures simplification of method of obtaining uranium dioxide powder, as well as reduction of pressure and reduction of temperature of reagent denitration process.

5 cl, 4 dwg, 4 ex

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RU 2 542 317 C2

Authors

Kuljako Jurij Mikhajlovich

Trofimov Trofim Ivanovich

Perevalov Sergej Anatol'Evich

Samsonov Maksim Dmitrievich

Mjasoedov Boris Fedorovich

Fedoseev Aleksandr Mikhajlovich

Bessonov Aleksej Anatol'Evich

Shadrin Andrej Jur'Evich

Vidanov Vitalij L'Vovich

Vinokurov Sergej Evgen'Evich

Dates

2015-02-20—Published

2013-06-25—Filed