Technique for converting spent radioactive ion exchange resins i

Details Technique for converting spent radioactive ion exchange resins i Technique for converting spent radioactive ion exchange resins i

1976-06-22

1980-11-25

Padgett, Benjamin R.

Compositions

Organic luminescent material containing compositions

Scintillating or lasing compositions

264 291, G21F 928

Patent

active

042357381

ABSTRACT:
An improved heat treatment for spent ion exchange resins containing radioive inorganic compounds is described for converting the resin into a form which can be safely stored, either directly or embedded in concrete or bituminous. The resin is heated, in the presence of an inert gas such as nitrogen or a reducing gas such as carbon monoxide, to a temperature sufficient to effect a carbonization of the resin but too low to cause the radioactive compounds in the resin to evaporate or sublimate. The resulting low-temperature carbonization of the resin effectively fixes the non-volatile compound to the resin, and prevents a later radiolytic decomposition of such compounds during storage.
Preferably, such technique is carried out in a combined furnace-condenser apparatus, wherein the condenser is disposed below and in communication with the lower end of the furnace for effecting a condensation of the volatile carbonization products of the resin while the latter is heated in the furnace in the required non-oxidizing atmosphere.

REFERENCES:
patent: 2361844 (1944-10-01), Horner
patent: 3334050 (1967-08-01), Grotenhuis et al.
patent: 3673101 (1972-06-01), McKenny, Jr. et al.
patent: 3791981 (1974-02-01), Calmon
patent: 3792136 (1974-02-01), Schmitt
patent: 3856622 (1974-12-01), Pollock et al.
patent: 3971732 (1976-07-01), Meier

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