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Ishiyama, Shintaro
no journal, ,
To prevent vaporization damage of BNCT (Boron Neutron Capture Therapy) lithium target during operation, direct synthesis of LiN thinlayer on lithium target surface was demonstrated in 0.1 MPa N gas at temperature below 548K and the following conclusions were derived; (1) Synthesis of LiN thin layer on lithium surface was confirmed after nitridation at 276-548K with surface contamination by oxygen and carbon. (2) Rapid nitridation over 15mass%/min was observed above Li melting temperature, whereas slow reaction under 0.02-0.5 mass%/minbelow melting temperature. (3) During nitridation, removal of oxygen contamination on LiN thin layer is taken place by nitrogen below Limelting temperature.
Ikeda, Ayumi*; Ono, Ryuhei*; Matsuyama, Emi*; Nomura, Mikihiro*; Tanaka, Nobuyuki; Kubo, Shinji
no journal, ,
In the IS process, the improvement of efficiency and the downsizing can be achieved if equilibrium inversion rate of HI decomposition is improved by using membrane reactor with hydrogen separation membrane. In this paper, the application to the silica hybrid membrane prepared by counter diffusion CVD method was investigated. As a result, we can obtain the H/HI permeation rate, 6820 and the H permeance, 5.010mol m s Pa at 400 C, indicating that this membrane can be applied to this system. In addition, relation between SF and HI permeance of membrane was investigated and verified to show the positive correlation. This result indicates that HI permeance of membrane can be evaluated by using SF permeance, which can be easily treated.
Kodaira, Takahide*; Oura, Kotone*; Ikeda, Ayumi*; Ono, Ryuhei*; Matsuyama, Emi*; Nomura, Mikihiro*; Sawada, Shinichi; Yamaki, Tetsuya; Tanaka, Nobuyuki; Kubo, Shinji
no journal, ,
Bunsen reactor in the IS process has a potential of the downsizing and the improvement of efficiency by using redox type reactor with an ion exchange membrane. The key to the performance of redox reactor is the development of the high performance ion exchange membrane. In this paper, we investigated the performance (proton transport number (t) and water permeation factor ()) of Nafion 212, which is the reference. As a result, t and were 0.63 and 2.82, respectively, indicating that not only H but also I and water permeate through the membrane. The permeation of these components might cause the precipitation of sulfur and the rising of the voltage. Aftertime, we must new ion exchange membrane which can restrict the permeation of I and water.