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2 065 212

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IPC

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Application

94030231/25, 1994-08-08

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Actual filing date

1994-08-08

(45)

Published

1996-08-10

(72)

Inventor

Lebedev V.I.Garusov Ju.V.Kritskij V.G.Shmakov L.V.Simanovskij V.M.Stjazhkin P.S.Tishkov V.M.

(73)

Holder

Leningradskaja Atomnaja Ehlektrostantsija Im.V.I.Lenina

METHOD FOR SPENT NUCLEAR FUEL STORAGE IN REACTOR COOLING PONDS Russian patent published in 1996 - IPC

Abstract RU 2065212 C1

FIELD: spent fuel storage at nuclear power stations. SUBSTANCE: corrosion-inert gas is bubbled through water medium of cooling ponds at pH value of 6-8. In the process, escape of radiolytic decomposition products, hydrogen peroxide, nitrite, and ion nitrite reducing corrosion resistance of zirconium is decreased. Bubbling is performed periodically and inert gas is shut off as oxygen concentration is brought to 5-10 mcg/kg at safety layer-to- radiolysis region interface. Gas supply is resumed as soon as oxygen concentration rises to 15-2- mcg/kg. The pH value is maintained between 6 and 8 by doping with alkaline metal hydroxide solution, such as potassium hydroxide. EFFECT: improved condition of station auxiliaries coolant, improved radiation safety in cooling pond premises, improved corrosion resistance and integrity of spent fuel assembly claddings. 3 cl, 1 dwg

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RU 2 065 212 C1

Authors

Lebedev V.I.

Garusov Ju.V.

Kritskij V.G.

Shmakov L.V.

Simanovskij V.M.

Stjazhkin P.S.

Tishkov V.M.

Dates

1996-08-10—Published

1994-08-08—Filed

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