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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.
Y. Inoue, K. Miyamoto, S. Fuma, H. Takeda
Fusion Science and Technology | Volume 48 | Number 1 | July-August 2005 | Pages 508-511
Technical Paper | Tritium Science and Technology - Containment, Safety, and Environment | doi.org/10.13182/FST05-A977
Articles are hosted by Taylor and Francis Online.
From a viewpoint of provision of useful and reliable field monitoring data for test exercises of environmental tritium transfer models, a pine tree is examined on its suitability as a bio-indicator for monitoring. Since the current model test exercises focus on the uptake, formation and translocation of organically bound tritium (OBT) in food crops, our monitoring program was designed to obtain useful information on the OBT formation in different parts of the pine tree by uptake of tritium through the atmosphere and soil. Monitoring was conducted in ordinal environment as well as in the vicinity of tritium discharge sources. The observations allow the discussion of the dependencies of OBT formation in the foliage part or wood part of the pine tree on an air-foliage pathway. As conclusions the usefulness of OBT data of a pine tree used as a bio-indicator for monitoring is presented.