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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.
Hirofumi Nakamura, Toshihiko Yamanishi
Fusion Science and Technology | Volume 60 | Number 4 | November 2011 | Pages 1527-1530
Interaction with Materials | Proceedings of the Ninth International Conference on Tritium Science and Technology (Part 2) | doi.org/10.13182/FST11-A12723
Articles are hosted by Taylor and Francis Online.
Possibility of metal coatings on F82H as the tritium permeation reduction coating was examined by means of deuterium permeation experiment. Metal coatings such as copper, aluminum and gold plating of 10 m thickness on outer surface of the F82H tube (250mm length, 10mm diameter and 1mm thickness) were prepared as the permeation reduction coating. Permeation Reduction Factor (PRF) of the metal coatings was evaluated by comparing the steady state permeation flux between metal plated specimens and F82H specimen. As the results, the PRF of the metal coatings at 590K were 5, 100 and >1000 for copper, aluminum and gold plating, respectively. Those results indicate the possibility that aluminum and gold plating could be applied in the tritium system as the tritium permeation reduction method.
