Hazardous or toxic waste destruction or containment – Destruction or containment of radioactive waste – By fixation in stable solid media
Patent
1994-08-02
1996-08-13
Mai, Ngoclan
Hazardous or toxic waste destruction or containment
Destruction or containment of radioactive waste
By fixation in stable solid media
134 3, 134 10, 134 2218, 134 41, 976DIG376, G21F 900
Patent
active
055457959
ABSTRACT:
A method to decontaminate radioactively contaminated metallic objects in which the objects are contacted with a non- radioactive, aqueous solution containing acetic acid. The metallic objects are in contact with the acid continuously or successively over several hours until the acid is completely stoichiometrically depleted. The concentration of the aqueous solution containing acetic acid is preferably approximately 0.3 Mol/l. These steps are repeated until the residual contamination of the metallic objects is beneath the desired target threshold of 0.37 Bq/cm.sup.2. The radioactive metallic oxides and metallic hydroxides in the aqueous stoichiometrically depleted solution are sedimented out, and the sludge is solidified with cement and subsequently decontaminated.
REFERENCES:
patent: 4508641 (1985-04-01), Hanulik
patent: 5008044 (1991-04-01), Hanulik
patent: 5386078 (1995-01-01), Hanulik
Deco-Hanulik AG
Mai Ngoclan
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