STP1240

    Lab-Scale Tests on ISV Vapor Transport Phenomena

    Published: Jan 1996


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    Abstract

    In situ vitrification (ISV) is a promising technology for remediating buried waste sites and contaminated soil sites. However, concerns exist that low soil permeabilities may limit vapor transport away from the advancing melt front and cause a melt expulsion that breaches ISV containment. As a result, two ISV lab tests were conducted at the Idaho National Engineering Laboratory (INEL) using INEL soil (permeability: 10-6 cm/s) and a low permeability (10-10 cm/s) clay material. The clay test also had a ceramic tube inserted vertically through the center of the area being melted to provide one-dimensional data on vapor transport. Results confirm that low soil permeabilities can limit vapor transport away from the advancing ISV melt front. In addition, peak pressures inside the ceramic tube were significantly greater than those outside the tube, indicating the importance of horizontal vapor transport around the advancing ISV melt front.

    Keywords:

    In situ vitrification, ISV, vapor transport, soil, permeability, clay


    Author Information:

    Farnsworth, RK
    Principal investigator and project manager, Idaho National Engineering Laboratory, EG&G Idaho, Inc., Office of Waste Technology Development, Idaho Falls, ID

    Gardner, BM
    Principal investigator and project manager, Idaho National Engineering Laboratory, EG&G Idaho, Inc., Office of Waste Technology Development, Idaho Falls, ID


    Paper ID: STP14120S

    Committee/Subcommittee: D34.01

    DOI: 10.1520/STP14120S


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