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Fusion Science and Technology
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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.
B. H. Park, N. S. Yoon, S.S. Kim, J. Y. Kim, M. Kwon
Fusion Science and Technology | Volume 43 | Number 1 | January 2003 | Pages 92-94
Heating | doi.org/10.13182/FST03-A11963571
Articles are hosted by Taylor and Francis Online.
Solutions for the RF heating problems in HANBIT mirror machine have been obtained by analytically under the assumptions of uniform plasma and magnetic field [1]. For the case of non-uniform plasma and magnetic field, a numerical calculation for entire region requires considerable computing times and delicate considerations of the antenna current. In this work, we developed a hybrid method in solving the RF heating problem in which the outer region of the plasma limiter including the antenna is treated by an analytic technique and the plasma region is solved by a numerical method. Solutions for two regions are matched on the plasma-vacuum interface self-consistently without loss of generality. Using this method, we can reduce the calculation time and required computer memories and present some results for HANBIT case.