Analysis of simultaneous H and D permeation through lithium-lead

Makoto Okada, Yuki Edao, Hiroaki Okitsu, Satoshi Fukada

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

Clarification of tritium transfer in blanket is an important issue for realizing fusion reactor. We perform an experiment of simultaneous H and D permeation through Li17Pb83 by means of an unsteady permeation method in order to clarify the interactions and isotope effects between H and D atoms. The experiment is conducted under the condition where the Sieverts' law holds. As a result, it is found that (i) H and D atoms permeate independently regardless of the H/D component ratio in the upstream gas and (ii) diffusion process is the rate-determining step in the overall permeation process. The diffusivity of H is around 1.4 times larger than that of D. The solubility of H is close to that of D. We estimate two vibration modes at an absorption site and a saddle point of H in Li17Pb83 based on the ratio of isotope effect. It is considered that the zero-point vibration energy of H at the absorption site in Li17Pb83 is around 0.173 eV and that at the saddle point is around 0.235 eV. The ratio of isotope effect is almost in proportion to the square root of mass ratio of D to H. The diffusivity of T can be estimated as 1/1.7 times of H.

元の言語英語
記事番号2405074
ジャーナルPlasma and Fusion Research
7
発行部数SPL.ISS.1
DOI
出版物ステータス出版済み - 12 1 2012

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isotope effect
lithium
saddle points
diffusivity
fusion reactors
blankets
tritium
mass ratios
upstream
atoms
vibration mode
proportion
solubility
vibration
estimates
gases
interactions
energy

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

これを引用

Analysis of simultaneous H and D permeation through lithium-lead. / Okada, Makoto; Edao, Yuki; Okitsu, Hiroaki; Fukada, Satoshi.

:: Plasma and Fusion Research, 巻 7, 番号 SPL.ISS.1, 2405074, 01.12.2012.

研究成果: ジャーナルへの寄稿記事

Okada, M, Edao, Y, Okitsu, H & Fukada, S 2012, 'Analysis of simultaneous H and D permeation through lithium-lead', Plasma and Fusion Research, 巻. 7, 番号 SPL.ISS.1, 2405074. https://doi.org/10.1585/pfr.7.2405074
Okada, Makoto ; Edao, Yuki ; Okitsu, Hiroaki ; Fukada, Satoshi. / Analysis of simultaneous H and D permeation through lithium-lead. :: Plasma and Fusion Research. 2012 ; 巻 7, 番号 SPL.ISS.1.
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