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Fusion Science and Technology
Latest News
Glass strategy: Hanford’s enhanced waste glass program
The mission of the Department of Energy’s Office of River Protection (ORP) is to complete the safe cleanup of waste resulting from decades of nuclear weapons development. One of the most technologically challenging responsibilities is the safe disposition of approximately 56 million gallons of radioactive waste historically stored in 177 tanks at the Hanford Site in Washington state.
ORP has a clear incentive to reduce the overall mission duration and cost. One pathway is to develop and deploy innovative technical solutions that can advance baseline flow sheets toward higher efficiency operations while reducing identified risks without compromising safety. Vitrification is the baseline process that will convert both high-level and low-level radioactive waste at Hanford into a stable glass waste form for long-term storage and disposal.
Although vitrification is a mature technology, there are key areas where technology can further reduce operational risks, advance baseline processes to maximize waste throughput, and provide the underpinning to enhance operational flexibility; all steps in reducing mission duration and cost.
J. Phillip Sharpe, Philippe Chappuis, David A. Petti
Fusion Science and Technology | Volume 39 | Number 2 | March 2001 | Pages 1061-1065
Safety and Environment | doi.org/10.13182/FST01-A11963384
Articles are hosted by Taylor and Francis Online.
Tokamak dust, the particulate matter generated during operation of a tokamak fusion device, was collected from Tore Supra in December 1999, during the initial phase of the scheduled shutdown for installation of advanced plasma facing components. Surface mass densities of material collected from locations with measured surface area are 1100 mg/m2 at the vessel bottom and 15 mg/m2 on average for all other locations. The specific surface area of dust collected from several locations is nearly uniform with an average value of 1.32 g/m2. Geometric mean diameters of samples from different locations have an average value of 3.0 μm, although geometric standard deviations vary from 1.93 to 4.03. The dust is composed of various quantities of carbon, iron, nickel, silicon, and chromium, among other trace elements.
