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Title: Method to synthesize dense crystallized sodalite pellet for immobilizing halide salt radioactive waste

Abstract

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:
 [1]
  1. (Tokyo, JP)
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
869459
Patent Number(s):
5340506
Assignee:
United States of America as represented by United States (Washington, DC) ANL
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; synthesize; dense; crystallized; sodalite; pellet; immobilizing; halide; salt; radioactive; waste; chloride; salts; containing; radionuclides; cesium; strontium; hazardous; materials; barium; intermediate; prepared; mixing; appropriate; amounts; silica; alumina; sodium; hydroxide; respect; heating; mixture; form; water; continued; drive; water-free; mixed; contacted; zeolite; concentrate; material; salt-intermediate; compacted; heated; conditions; heat; pressure; trapped; cage; structure; provides; final; product; excellent; leach; resistant; capabilities; waste chloride; sodium hydroxide; hazardous material; radioactive waste; hazardous materials; chloride salt; chloride salts; final product; containing radionuclides; salts containing; halide salt; immobilizing waste; leach resistant; /588/210/423/502/

Citation Formats

Koyama, Tadafumi. Method to synthesize dense crystallized sodalite pellet for immobilizing halide salt radioactive waste. United States: N. p., 1994. Web.
Koyama, Tadafumi. Method to synthesize dense crystallized sodalite pellet for immobilizing halide salt radioactive waste. United States.
Koyama, Tadafumi. Sat . "Method to synthesize dense crystallized sodalite pellet for immobilizing halide salt radioactive waste". United States. https://www.osti.gov/servlets/purl/869459.
@article{osti_869459,
title = {Method to synthesize dense crystallized sodalite pellet for immobilizing halide salt radioactive waste},
author = {Koyama, Tadafumi},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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