The In Situ Vitrification Project
Abstract
The Columbia Section of the American Society of Civil Engineers (ASCE) is pleased to submit the In Situ Vitrification (ISV) Project to the Pacific Northwest Council for consideration as the Outstanding Civil Engineering Achievement. The ISV process, developed by Battelle-Northwest researchers beginning in 1980, converts contaminated soils and sludges to a glass and crystalline product. In this way it stabilizes hazardous chemical and radioactive wastes and makes them chemically inert. This report describes the process. A square array of four molybdenum electrodes is inserted into the ground to the desired treatment depth. Because soil is not electrically conductive when the moisture has been driven off, a conductive mixture of flaked graphite and glass frit is placed among the electrodes as a starter path. An electrical potential is applied to the electrodes to establish an electric current in the starter path. The resultant power heats the starter path and surrounding soil to 2000/degree/C, well above the initial soil-melting temperature of 1100/degree/C to 1400/degree/C. The graphite starter path is eventually consumed by oxidation, and the current is transferred to the molten soil, which is electrically conductive. As the molten or vitrified zone grows, it incorporates radionuclides and nonvolatile hazardous elements, such asmore »
- Authors:
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- OSTI Identifier:
- 6348085
- Report Number(s):
- PNL-SA-16327; CONF-8810349-1
ON: DE89009380; TRN: 89-011129
- DOE Contract Number:
- AC06-76RL01830
- Resource Type:
- Conference
- Resource Relation:
- Conference: Outstanding Engineering Achievement Award meeting, Seattle, WA, USA, 1 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; HAZARDOUS MATERIALS; WASTE PROCESSING; IN-SITU PROCESSING; EVALUATION; RADIOACTIVE WASTES; SOILS; CONTAMINATION; GLASS; OFF-GAS SYSTEMS; PORTABLE EQUIPMENT; VITRIFICATION; EQUIPMENT; MANAGEMENT; MATERIALS; PROCESSING; RADIOACTIVE MATERIALS; WASTE MANAGEMENT; WASTES; 052002* - Nuclear Fuels- Waste Disposal & Storage; 053000 - Nuclear Fuels- Environmental Aspects
Citation Formats
Buelt, J. L. The In Situ Vitrification Project. United States: N. p., 1988.
Web.
Buelt, J. L. The In Situ Vitrification Project. United States.
Buelt, J. L. 1988.
"The In Situ Vitrification Project". United States. https://www.osti.gov/servlets/purl/6348085.
@article{osti_6348085,
title = {The In Situ Vitrification Project},
author = {Buelt, J. L.},
abstractNote = {The Columbia Section of the American Society of Civil Engineers (ASCE) is pleased to submit the In Situ Vitrification (ISV) Project to the Pacific Northwest Council for consideration as the Outstanding Civil Engineering Achievement. The ISV process, developed by Battelle-Northwest researchers beginning in 1980, converts contaminated soils and sludges to a glass and crystalline product. In this way it stabilizes hazardous chemical and radioactive wastes and makes them chemically inert. This report describes the process. A square array of four molybdenum electrodes is inserted into the ground to the desired treatment depth. Because soil is not electrically conductive when the moisture has been driven off, a conductive mixture of flaked graphite and glass frit is placed among the electrodes as a starter path. An electrical potential is applied to the electrodes to establish an electric current in the starter path. The resultant power heats the starter path and surrounding soil to 2000/degree/C, well above the initial soil-melting temperature of 1100/degree/C to 1400/degree/C. The graphite starter path is eventually consumed by oxidation, and the current is transferred to the molten soil, which is electrically conductive. As the molten or vitrified zone grows, it incorporates radionuclides and nonvolatile hazardous elements, such as heavy metals, and destroys organic components by pyrolysis. 2 figs.},
doi = {},
url = {https://www.osti.gov/biblio/6348085},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Oct 01 00:00:00 EDT 1988},
month = {Sat Oct 01 00:00:00 EDT 1988}
}