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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.
H. Tanaka, M. Sakamoto, K. Furutachi, K. Oki, M. Mizuguchi, Y. Nagatsuka, M. Yoshikawa, R. Nohara, M. Yoshikawa, J. Kohagura, N. Ohno, Y. Tsuji
Fusion Science and Technology | Volume 68 | Number 1 | July 2015 | Pages 125-129
Technical Paper | Open Magnetic Systems 2014 | doi.org/10.13182/FST14-874
Articles are hosted by Taylor and Francis Online.
Propagation behavior of 3–4 kHz electron density fluctuation in the core and edge regions was investigated in the GAMMA 10 tandem mirror device. Frequency analysis was employed for high spatiotemporal-resolution fluctuations measured by gold neutral beam probe (GNBP) in the central cell and Langmuir probes in the end region. We found same-frequency periodic fluctuations in both signals and applied the correlation analysis technique. By considering the geometry of the measurement system, propagation speeds of the periodic fluctuation along and across the magnetic field lines were estimated.
