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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.
Atsushi Suzuki, Tomoya Hirosawa, Kenji Yamaguchi, Michio Yamawaki
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 887-891
Fusion Blanket and Shield Technology (Poster Session) | doi.org/10.13182/FST98-A11963725
Articles are hosted by Taylor and Francis Online.
The work function change of Li4SiO4 and Li2TiO3 were measured in atmosphere of various gas compositions with a high temperature Kelvin probe. The work function change of Li4SiO4 was found to be composed of two steps: one was caused by the formation of oxygen vacancies and the other corresponding to the population change of OH− at the surface. While, a single step of the work function change was observed for Li2TiO3. That was attributed to the adsorption/desorption processes at the surface. It was suggested that oxygen vacancies are formed in near-surface bulk of Li4SiO4, it is not in the case for Li2TiO3.
