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2 169 957

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IPC

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Application

99102128/06, 1999-02-01

(24)

Start date

1999-02-01

(22)

Actual filing date

1999-02-01

(45)

Published

2001-06-27

(72)

Inventor

Lebedev V.I.Garusov Ju.V.Prozorov V.V.Moskovskij V.P.Karrask M.P.Tishkov V.M.Cheremiskin V.I.

(73)

Holder

Gosudarstvennoe Predprijatie Leningradskaja Atomnaja Ehlektrostantsija Im. V.I. LeninaZakrytoe Aktsionernoe Obshchestvo Nauchno-Proizvodstvennoe Ob"Edinenie Ehnergoatominvent

METHOD FOR DECONTAMINATING WATER-COOLED REACTOR CIRCUITS Russian patent published in 2001 - IPC

Abstract RU 2169957 C2

FIELD: nuclear power engineering; low-waste decontamination of power-generating equipment. SUBSTANCE: reactor circuits are treated with solution of nitric acid and nitric-acid aluminum at 80- 100 C for 2-5 h. Upon passing spent solution through ion-exchange filters sodium (potassium) nitrite is introduced in system its concentration being 1-10 mg/kg. Such treatment provides for suppressing corrosion process for long period. Proposed method makes it possible to use low-quality water and to reduce protective concentration of sodium (potassium) nitrite when equipment is given preservation treatment. EFFECT: enhanced decontamination factor and shielding properties of oxide films formed in the process. 4 tbl

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RU 2 169 957 C2

Authors

Lebedev V.I.

Garusov Ju.V.

Prozorov V.V.

Moskovskij V.P.

Karrask M.P.

Tishkov V.M.

Cheremiskin V.I.

Dates

2001-06-27—Published

1999-02-01—Filed

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