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Title: Method for solidification of radioactive and other hazardous waste

Abstract

Solidification of liquid radioactive waste, and other hazardous wastes, is accomplished by the method of the invention by incorporating the waste into a porous glass crystalline molded block. The porous block is first loaded with the liquid waste and then dehydrated and exposed to thermal treatment at 50-1,000.degree. C. The porous glass crystalline molded block consists of glass crystalline hollow microspheres separated from fly ash (cenospheres), resulting from incineration of fossil plant coals. In a preferred embodiment, the porous glass crystalline blocks are formed from perforated cenospheres of grain size -400+50, wherein the selected cenospheres are consolidated into the porous molded block with a binder, such as liquid silicate glass. The porous blocks are then subjected to repeated cycles of saturating with liquid waste, and drying, and after the last cycle the blocks are subjected to calcination to transform the dried salts to more stable oxides. Radioactive liquid waste can be further stabilized in the porous blocks by coating the internal surface of the block with metal oxides prior to adding the liquid waste, and by coating the outside of the block with a low-melting glass or a ceramic after the waste is loaded into the block.

Inventors:
 [1];  [1];  [1];  [2];  [1];  [2];  [2];  [1];  [3];  [3];  [4];  [4];  [4]
+ Show Inventor Affiliations
  1. Krasnoyarsk, RU
  2. Zheleznogorsk, RU
  3. Saint-Petersburg, RU
  4. Idaho Falls, ID
Issue Date:
Research Org.:
BECHTEL BWXT IDAHO LLC
OSTI Identifier:
874845
Patent Number(s):
6472579
Assignee:
The United States of America as represented by the Department of Energy (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C03 - GLASS C03C - CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
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DOE Contract Number:  
AC07-99ID13727
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; solidification; radioactive; hazardous; waste; liquid; wastes; accomplished; incorporating; porous; glass; crystalline; molded; block; loaded; dehydrated; exposed; thermal; treatment; 50-1000degree; consists; hollow; microspheres; separated; fly; ash; cenospheres; resulting; incineration; fossil; plant; coals; embodiment; blocks; formed; perforated; grain; size; -40050; selected; consolidated; binder; silicate; subjected; repeated; cycles; saturating; drying; cycle; calcination; transform; dried; salts; stable; oxides; stabilized; coating; internal; surface; metal; prior; adding; outside; low-melting; ceramic; metal oxide; fly ash; radioactive waste; grain size; thermal treatment; liquid radioactive; porous glass; /588/

Citation Formats

Anshits, Alexander G, Vereshchagina, Tatiana A, Voskresenskaya, Elena N, Kostin, Eduard M, Pavlov, Vyacheslav F, Revenko, Yurii A, Tretyakov, Alexander A, Sharonova, Olga M, Aloy, Albert S, Sapozhnikova, Natalia V, Knecht, Dieter A, Tranter, Troy J, and Macheret, Yevgeny. Method for solidification of radioactive and other hazardous waste. United States: N. p., 2002. Web.
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Anshits, Alexander G, Vereshchagina, Tatiana A, Voskresenskaya, Elena N, Kostin, Eduard M, Pavlov, Vyacheslav F, Revenko, Yurii A, Tretyakov, Alexander A, Sharonova, Olga M, Aloy, Albert S, Sapozhnikova, Natalia V, Knecht, Dieter A, Tranter, Troy J, & Macheret, Yevgeny. Method for solidification of radioactive and other hazardous waste. United States.
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Anshits, Alexander G, Vereshchagina, Tatiana A, Voskresenskaya, Elena N, Kostin, Eduard M, Pavlov, Vyacheslav F, Revenko, Yurii A, Tretyakov, Alexander A, Sharonova, Olga M, Aloy, Albert S, Sapozhnikova, Natalia V, Knecht, Dieter A, Tranter, Troy J, and Macheret, Yevgeny. Tue . "Method for solidification of radioactive and other hazardous waste". United States. https://www.osti.gov/servlets/purl/874845.
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@article{osti_874845,
title = {Method for solidification of radioactive and other hazardous waste},
author = {Anshits, Alexander G and Vereshchagina, Tatiana A and Voskresenskaya, Elena N and Kostin, Eduard M and Pavlov, Vyacheslav F and Revenko, Yurii A and Tretyakov, Alexander A and Sharonova, Olga M and Aloy, Albert S and Sapozhnikova, Natalia V and Knecht, Dieter A and Tranter, Troy J and Macheret, Yevgeny},
abstractNote = {Solidification of liquid radioactive waste, and other hazardous wastes, is accomplished by the method of the invention by incorporating the waste into a porous glass crystalline molded block. The porous block is first loaded with the liquid waste and then dehydrated and exposed to thermal treatment at 50-1,000.degree. C. The porous glass crystalline molded block consists of glass crystalline hollow microspheres separated from fly ash (cenospheres), resulting from incineration of fossil plant coals. In a preferred embodiment, the porous glass crystalline blocks are formed from perforated cenospheres of grain size -400+50, wherein the selected cenospheres are consolidated into the porous molded block with a binder, such as liquid silicate glass. The porous blocks are then subjected to repeated cycles of saturating with liquid waste, and drying, and after the last cycle the blocks are subjected to calcination to transform the dried salts to more stable oxides. Radioactive liquid waste can be further stabilized in the porous blocks by coating the internal surface of the block with metal oxides prior to adding the liquid waste, and by coating the outside of the block with a low-melting glass or a ceramic after the waste is loaded into the block.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}
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Works referenced in this record:

The polymorphism of some rare earth oxides and their reaction with water
journal, May 1964

The possibilities of237Np and241Am disposal by transmutation in their irradiation with thermal neutrons in porous immobilizing agents
journal, March 1991

Development and Testing of a New Porous Crystalline Matrix (Gubka) for Stabilizing Actinide Solutions
journal, January 1999

The study of composition of novel high temperature catalysts for oxidative conversion of methane
journal, July 1998

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