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2 253 916

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IPC

(21) (22)

Application

2004119387/06, 2004-06-28

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Start date

2004-06-28

(22)

Actual filing date

2004-06-28

(45)

Published

2005-06-10

(72)

Inventor

Davydov V.V.Degal'Tsev Ju.G.Kukharkin N.E.Ponomarev-Stepnoj N.N.Samarin E.N.Sidorenko N.M.Stepennov B.S.Utkin Ju.M.Chernyshov V.O.

(73)

Holder

Rossijskij Nauchnyj Tsentr Institut"

MODE OF PROCESSING IRRADIATED NUCLEAR FUEL Russian patent published in 2005 - IPC

Abstract RU 2253916 C1

FIELD: the invention refers to the field of treatment with spent nuclear fuel.

SUBSTANCE: the mode of processing irradiated nuclear fuel is in thermal oxidation of uranium dioxide on air and regeneration of received uranium protoxide in surroundings of hydrogen contents. At that oxidation-regeneration stages are conducted repeatedly. The oxidation is carried on at temperature 700-800°C and regeneration- at temperature 600-700°C. After that annealing of uranium dioxide is conducted at temperature 1000-1300°C with simultaneous vacuum distillation of volatile products of fission particular of caesium.

EFFECT: the advantages of the invention is in effective withdrawal of products of fission and in the reduction of the activity of fuel.

4 cl,1 dwg, 1 ex

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RU 2 253 916 C1

Authors

Davydov V.V.

Degal'Tsev Ju.G.

Kukharkin N.E.

Ponomarev-Stepnoj N.N.

Samarin E.N.

Sidorenko N.M.

Stepennov B.S.

Utkin Ju.M.

Chernyshov V.O.

Dates

2005-06-10—Published

2004-06-28—Filed