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- W2187014920 abstract "This paper provides a status of the In Situ Transuranic Waste Delineation and Removal Project in which the GeoMelt® Subsurface Planar Vitrification™ (SPV™) process is being evaluated for the in situ treatment of burial sites containing remote handled mixed transuranic (TRU) waste. The GeoMelt® SPV™ process was invented and patented by Geosafe Corporation. AMEC holds the exclusive worldwide license to use this technology. The current project is part of a three-phase demonstration program to evaluate the effectiveness of the GeoMelt® SPV™ process to treat waste contained in vertical pipe units (VPUs) and caissons that were used for the disposal of remote handled transuranic wastes located at Hanford’s 618-10 and 618-11 burial grounds. This project is being performed for the US Department of Energy (DOE) for use at the Hanford site and other DOE installations. The Phase I evaluation determined that removal and treatment of the 618-10/11 VPUs are beyond what can be safely accomplished using conventional excavation methods. Accordingly, a careful stepwise nonintrusive delineation approach and treatment using the GeoMelt® SPV™ technology, followed by removal, characterization, and disposal of the resulting inert vitrified mass was identified as the preferred alternative. Phase II of the project, which started in July 2004, included a full-scale non-radioactive demonstration of AMEC’s GeoMelt® SPV™ process on a mock VPU configured to match the actual VPUs. The non-radioactive demonstration (completed in May 2005) was performed to confirm the approach and design before proceeding to a radioactive (“hot”) demonstration on an actual VPU. This demonstration took approximately 130 hours, processed the entire mock VPU, and resulted in a vitrified monolith weighing an estimated 90 tonnes.[1] Plans for a radioactive demonstration on an actual VPU are being developed for CY 2006. In addition to demonstrating GeoMelt® SPV™, delineation techniques are being evaluated as part of the project to confirm the locations of the actual VPUs and to progressively determine their physical and chemical contents. The initial calibration and testing activities were completed in December 2005. The techniques included non-intrusive geophysical measurements from adjacent boreholes (ground penetrating radar, neutron-gamma radiography, etc.). Other methods available for use, on an as needed basis, include gas headspace sampling and boroscope examinations inside the VPUs/caissons." @default.
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- W2187014920 date "2006-01-01" @default.
- W2187014920 modified "2023-09-27" @default.
- W2187014920 title "Subsurface Planar Vitrification Treatment of Problematic TRU Wastes: Status of a Technology Demonstration Program" @default.
- W2187014920 hasPublicationYear "2006" @default.
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