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2 068 208

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IPC

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Application

93041399/25, 1993-08-18

(22)

Actual filing date

1993-08-18

(45)

Published

1996-10-20

(72)

Inventor

Eperin A.P.Gribanenkov S.V.Olejnik M.S.Chvatov V.N.Tishkov V.M.Trofimov L.V.

(73)

Holder

Leningradskaja Atomnaja Ehlektrostantsija Im. V.I.Lenina

METHOD FOR RECOVERING RADIOACTIVE ION-EXCHANGE RESINS Russian patent published in 1996 - IPC

Abstract RU 2068208 C1

FIELD: recovery of radioactive wastes, such as ion-exchange resins, by cementing them. SUBSTANCE: method involves preliminary thermal treatment of ion-exchange resins at 350-395 C until they loose their ability to swell in water (mass loss by about 35%), cooling of steam-gas products of thermal treatment, and mixing of resin-oil condensate obtained with solid residue of ion-exchange resins, doping of alumina cement until water-cement proportion of about 0.5 is attained, followed by curing under air and moisture conditions for 28 days. Volume of solidified blocks equals that of initial wet ion-exchange resin. EFFECT: improved ion-exchange resin filling of cement blocks, reduced volume of the latter.

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RU 2 068 208 C1

Authors

Eperin A.P.

Gribanenkov S.V.

Olejnik M.S.

Chvatov V.N.

Tishkov V.M.

Trofimov L.V.

Dates

1996-10-20—Published

1993-08-18—Filed

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