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Title: Method of preparing sodalite from chloride salt occluded zeolite

A method is described for immobilizing waste chloride salts containing radionuclides and hazardous nuclear material for permanent disposal starting with a substantially dry zeolite and sufficient glass to form leach resistant sodalite with occluded radionuclides and hazardous nuclear material. The zeolite and glass are heated to a temperature up to about 1000 K to convert the zeolite to sodalite and thereafter maintained at a pressure and temperature sufficient to form a sodalite product near theoretical density. Pressure is used on the formed sodalite to produce the required density.
Inventors:
;
Issue Date:
OSTI Identifier:
458577
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 052001; 052002; PA: EDB-97:053850; SN: 97001758984
Patent Number(s):
US 5,613,240/A/
Application Number:
PAN: 8-375,141; TRN: 97:006790
Contract Number:
W-31109-ENG-38
Resource Relation:
Other Information: PBD: 18 Mar 1997
Research Org:
Univ. of Chicago, IL (United States)
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; CHLORIDES; SOLIDIFICATION; WASTE FORMS; RADIOACTIVE WASTE PROCESSING; HAZARDOUS MATERIALS; ZEOLITES; SODIUM SILICATES; ALUMINIUM SILICATES; PRESSURIZATION; RADIOACTIVE WASTE DISPOSAL