Process performance of the pilot-scale in situ vitrification of a simulated waste disposal site at the Oak Ridge National Laboratory

Abstract

Frank Hara and his respective staffs were invaluable in providing highquality laboratory studies and analytical services to the program. We would also like to acknowledge the material characterization staff of Gary Maupin, Anita Alger, and Mike Schweiger for their high-quality laboratory material evaluation of the vitrified mass product. In addition, we thank Kathy Borgeson for editing the text and DeDe Johnson for completing the word processing .

Tracer-level radioactive pilot-scale test of in situ vitrification for the stabilization of contaminated soil sites at ORNL

“…This test is the second step in " evaluating ISV as a remedial action for the pits and trenches at Oak Ridge National Laboratory (ORNL). A previous pilot-scale ISV test, using nonradioactive tracers for Cs and Sr, was completed in 1987 and reported in 1989 Jacobs et al 1988;Carter et al 1988). The present test again used a one-half scale model of trench 7 and Department of Energy (DOE) pilot-scale ISV equipment which was operated by Pacific Northwest Laboratory (PNL).…”

A preliminary study of the controls on melting during in situ vitrification

“…In particular, seepage pits and trenches used to dispose of radioactive liquid wastes are under consideration for vitrification. Tests addressing issues for the vitrification of pits and trenches at ORNL have been performed at the laboratory, engineering, and pilot scales (Carter et al 1987(Carter et al , 1988Spalding and Jacobs 1989). Previous results are encouraging, but several issues remain (Spalding and Jacobs 1989).…”

Evaluation of the graphite electrode DC arc furnace for the treatment of INEL buried wastes

“…For submerged arc operation,99.12 wt% Cs retentionwas observed. These values compare favorably to 90% to 99.25% for the LFCM technologyand 99.63% for ISV (Carter 1988, Peterson 1992, Goles 1983. The total mass fraction lost to the off-gas was measured to be 0.3 wt% and 0.54 wt% for submergedand nonsubmergedarc operation, respectively,based on all inorganicconstituentsof the feed material.…”