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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.
Kameo Ishii, Toshiki Takahashi, Akira Abe, Isao Katanuma, Akiyosi Itakura, Makoto Ichimura, Yasuhito Kiwamoto, Kiyoshi Yatsu, Teruo Tamano
Fusion Science and Technology | Volume 27 | Number 3 | April 1995 | Pages 413-416
Mirror Device Studies | doi.org/10.13182/FST95-A11947118
Articles are hosted by Taylor and Francis Online.
Loss-cone boundaries have been directly measured using a newly developed diagnostic device in the tandem mirror GAMMA 10. Double loss boundaries clearly appeared in the velocity space of the end-loss ions in the experiment without plug ECRH, and upon turning on the ECRH, the double boundaries changed to a single loss boundary. From a microscopic viewpoint of the ion distribution function, it was verified that plug potential was created turning on ECRH without producing sloshing ions by neutral beam injection. Time evolution of plasma potentials is discussed.
