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2 179 154

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C1

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Application

2000111957/12, 2000-05-11

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Start date

2000-05-11

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Actual filing date

2000-05-11

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Published

2002-02-10

(72)

Inventor

Aleksandrov A.B.Zvontsov A.S.Kustov L.V.Lazarev V.V.Ljakh A.G.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Zavod Khimkontsentratov"

METHOD OF PREPARING URANIUM DIOXIDE Russian patent published in 2002 - IPC

Abstract RU 2179154 C1

FIELD: preparation of uranium dioxide of nuclear brand. SUBSTANCE: uraniltricarbonate is uniformly fed into notary tubular furnace. Temperature in furnace is 700 C. Hydrogen with specific rate of 0.062-0.91 nu cubic m/h per kg of UO2 is delivered by counterflow into uranium dioxide discharge unit. The resulting uranium dioxide contains less than 3•10-3 wt % of nickel and 5,5•10-3wt % of iron. EFFECT: improved properties of uranium dioxide and reduced amount of iron and nickel impurities. 3 ex

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RU 2 179 154 C1

Authors

Aleksandrov A.B.

Zvontsov A.S.

Kustov L.V.

Lazarev V.V.

Ljakh A.G.

Dates

2002-02-10—Published

2000-05-11—Filed

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