Plasma and Fusion Research
Volume 13, 3405048 (2018)
Regular Articles
- National Institute for Fusion Science, National Institute of Natural Sciences, 322-6 Oroshi, Toki 509-5292, Japan
- 1)
- Radioscience Research Laboratory, Faculty of Science, Shizuoka University, Shizuoka 422-8529, Japan
Abstract
Tritium transport code in Li2TiO3 pebbles were developed in this study. In the simulation code, tritium transports in a grain, a closed-pore and an opened-pore were modeled and combined. The tritium transport in grain was modeled by the tritium diffusion, trapping/detrapping by defects, and the annihilation process of defects. The adsorption/desorption equilibrium of diffusing tritium gas molecule was modeled for the tritium transports in opened-pores. A vacant-core and shell model was used to model the tritium transport in closed-pores. The results by simulation code suggested that the tritium trapping by closed-pores would result in the shift of tritium release toward higher temperature side as dissociation of tritium gas molecule in closed-pores requires higher activation energy.
Keywords
tritium, thermal desorption spectroscopy, opened-pore, closed-pore, Knudsen diffusion
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