Global to push GA events into
skip to main content

Title: 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.
Inventors:
Issue Date:
OSTI Identifier:
10192129
Assignee:
Dept. of Energy ANL; SCA: 052001; PA: EDB-95:006750; SN: 94001260529
Patent Number(s):
PATENTS-US-A7943624
Application Number:
ON: DE95001782; PAN: 7-943,624;
Contract Number:
W-31109-ENG-38
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.
Research Org:
Argonne National Lab., IL (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; RADIOACTIVE WASTES; RADIOACTIVE WASTE PROCESSING; INVENTIONS; CHLORIDES; CESIUM; STRONTIUM; ZEOLITES; VITRIFICATION; BENCH-SCALE EXPERIMENTS; BARIUM; SODIUM; ELECTROREFINING; 052001; WASTE PROCESSING