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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.
A. V. Anikeev et al. (18R08)
Fusion Science and Technology | Volume 51 | Number 2 | February 2007 | Pages 79-81
Technical Paper | Open Magnetic Systems for Plasma Confinement | doi.org/10.13182/FST07-A1319
Articles are hosted by Taylor and Francis Online.
The Synthesised Hot Ion Plasmoid (SHIP) experiment is in progress at the GDT facility of the Budker Institute (Novosibirsk). It is aimed at the investigation of plasmas in the region of high neutron production in a GDT based fusion neutron source proposed by the Budker Institute. This paper presents the recent results obtained in the experiments with SHIP. The results of numerical simulations are compared with the experimental results.The average value of fast ion density was two times greater than density of unperturbed streaming plasma and three times greater than the warm ion density in the presence of NBI. Fast ion confinement was determined only by Coulomb collisions and charge - exchange of fast ions on neutral beams. No evidence of MHD or micro instabilities was observed. Ambipolar plugging was demonstrated in the SHIP experiment. Further experiments with upgraded Neutral Beam system are started.
