Trapping of deuterium dissolved in fluidized Li by Y

• Published in: Fusion engineering and design 2014-10, Vol.89 (7-8), p.1346-1350
• Main Authors: Fukada, Satoshi, Hiromoto, Tetsushi, Shigeharu, Satoshi, Sugie, Kunihiro, Edao, Yuki
• Format: Article
• Language: English
• Subjects: Depletion; Deuterium; Dissolution; Dissolution analysis; Fluidizing; Isotopes; Liquids; Lithium; Trapping; Tubes; Yttrium
• ISSN: 0920-3796; 1873-7196
• DOI: 10.1016/j.fusengdes.2014.02.030

•Recovery of deuterium is experimentally proved in liquid Li forced convection flow by Y metal trap.•10ppm D as the target concentration is successfully removed from Li flow.•H2O or HNO3 dissolution technique is developed to analyze D concentration in Li or Y. Recovery of D dissolved in a liquid Li flow at low D concentration is experimentally investigated using a Y metal absorber under the two fluidized conditions: (a) in a vertical cylindrical tube and (b) in an agitated vessel. The target concentration is 1appm in Li around at 300°C. The two concentrations of D remaining in Li and recovered by Y are detected by a dissolution method using H2O with depleted-D and HNO3. The main released species is HD. A small amount of HDO released is reduced to HD by a Mg particle bed. It is found that HF-treated Y can absorb H isotopes at the target temperature and concentration. The chemical dissolution technique is found to be useful to specify the two absolute concentrations of D recovered by Y and D remaining in Li.