Method to synthesize dense crystallized sodalite pellet for immobilizing halide salt radioactive waste
This report describes a method for immobilizing waste chloride salts containing radionuclides such as cesium and strontium and hazardous materials such as barium. A sodalite intermediate is prepared by mixing appropriate amounts of silica, alumina and sodium hydroxide with respect to sodalite and heating the mixture to form the sodalite intermediate and water. Heating is continued to drive off the water to form a water-free intermediate. The water-free intermediate is mixed with either waste salt or waste salt which has been contacted with zeolite to concentrate the radionuclides and hazardous material. The waste salt-intermediate mixture is then compacted and heated under conditions of heat and pressure to form sodalite with the waste salt, radionuclides and hazardous material trapped within the sodalite cage structure. This provides a final product having excellent leach resistant capabilities.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- Dept. of Energy
- Patent Number(s):
- PATENTS-US-A7943624
- Application Number:
- ON: DE95001782; PAN: 7-943,624;
- OSTI ID:
- 10192129
- Resource Relation:
- Patent File Date: 1992 Sep 11; Other Information: PBD: 1992; Related Information: U. S. Patent No. 5,340,506 filed 08/23/1994.
- Country of Publication:
- United States
- Language:
- English
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