Mixed Waste Salt Encapsulation Using Polysiloxane - Final Report

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Description

A proof-of-concept experimental study was performed to investigate the use of Orbit Technologies polysiloxane grouting material for encapsulation of U.S. Department of Energy mixed waste salts leading to a final waste form for disposal. Evaporator pond salt residues and other salt-like material contaminated with both radioactive isotopes and hazardous components are ubiquitous in the DOE complex and may exceed 250,000,000 kg of material. Current treatment involves mixing low waste percentages (less than 10% by mass salt) with cement or costly thermal treatment followed by cementation to the ash residue. The proposed technology involves simple mixing of the granular salt material ... continued below

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Medium: P; Size: 61 pages

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Miller, C.M.; Loomis, G.G. & Prewett, S.W. November 1, 1997.

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Description

A proof-of-concept experimental study was performed to investigate the use of Orbit Technologies polysiloxane grouting material for encapsulation of U.S. Department of Energy mixed waste salts leading to a final waste form for disposal. Evaporator pond salt residues and other salt-like material contaminated with both radioactive isotopes and hazardous components are ubiquitous in the DOE complex and may exceed 250,000,000 kg of material. Current treatment involves mixing low waste percentages (less than 10% by mass salt) with cement or costly thermal treatment followed by cementation to the ash residue. The proposed technology involves simple mixing of the granular salt material (with relatively high waste loadings-greater than 50%) in a polysiloxane-based system that polymerizes to form a silicon-based polymer material. This study involved a mixing study to determine optimum waste loadings and compressive strengths of the resultant monoliths. Following the mixing study, durability testing was performed on promising waste forms. Leaching studies including the accelerated leach test and the toxicity characteristic leaching procedure were also performed on a high nitrate salt waste form. In addition to this testing, the waste form was examined by scanning electron microscope. Preliminary cost estimates for applying this technology to the DOE complex mixed waste salt problem is also given.

Physical Description

Medium: P; Size: 61 pages

Notes

INIS; OSTI as DE00005724

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  • Other Information: PBD: 1 Nov 1997

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  • Report No.: INEEL/EXT-97-01234
  • Grant Number: AC07-94ID13223
  • DOI: 10.2172/5724 | External Link
  • Office of Scientific & Technical Information Report Number: 5724
  • Archival Resource Key: ark:/67531/metadc694830

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  • November 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • July 19, 2016, 12:28 p.m.

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Miller, C.M.; Loomis, G.G. & Prewett, S.W. Mixed Waste Salt Encapsulation Using Polysiloxane - Final Report, report, November 1, 1997; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc694830/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.