METHOD FOR ACID OXIDATION OF RADIOACTIVE, HAZARDOUS, AND MIXED ORGANIC WASTE MATERIALS

WIPO Patent Application WO1998053463

A3

The present invention is directed to a process for reducing the volume of low level radioactive and mixed waste to enable the waste to be more economically stored in a suitable repository, and for placing the waste into a form suitable for permanent disposal. The invention involves a process for preparing radioactive, hazardous, or mixed waste for storage by contacting the waste starting material containing at least one organic carbon-containing compound and at least one radioactive or hazardous waste component with nitric acid and phosphoric acid simultaneously at a contacting temperature in the range of about 140 DEG C. to about 210 DEG C. for a period of time sufficient to oxidize at least a portion of the organic carbon-containing compound to gaseous products, thereby producing a residual concentrated waste product containing substantially all of said radioactive or inorganic hazardous waste component; and immobilizing the residual concentrated waste product in a solid phosphate-based ceramic or glass form.

PIERCE ROBERT A
SMITH JAMES R
BICKFORD DENNIS F
RAMSEY WILLIAM G
CICERO-HERMAN CONNIE A

PCT/US1998/009823

March 11, 1999

May 14, 1998

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WESTINGHOUSE SAVANNAH RIVER CO (US)

A62D3/00; A62D3/33; A62D3/38; G21F9/06; G21F9/30; A62D101/20; A62D101/22; A62D101/24; A62D101/26; (IPC1-7): G21F9/00

FR2642563A1	1990-08-03
FR2746207A1	1997-09-19
DE2240928A1	1974-03-14
GB2080605A	1982-02-03
GB2206341A	1989-01-05

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