Study on hydrogen isotopes permeation in fluidized state of liquid lithium-lead

Shunsuke Yoshimura; Ryosuke Yoshimura; Makoto Okada; Satoshi Fukada; Yuki Edao

doi:10.13182/FST14-T104

Study on hydrogen isotopes permeation in fluidized state of liquid lithium-lead

Shunsuke Yoshimura, Ryosuke Yoshimura, Makoto Okada, Satoshi Fukada, Yuki Edao

Engineering Science for Advanced energy system

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3 Citations (Scopus)

Abstract

Hydrogen transfer under a fluidized condition of Li-Pb is investigated experimentally to design a Li-Pb blanket system. Li-Pb eutectic alloy flows through inside of a Ni tube in the experimental system, where H₂ permeates into and out of the forced Li-Pb flow. The overall H₂ permeation rate is analyzed using a mass balance model. Hydrogen atoms diffuse in Ni and Li-Pb. The steady-state H₂ permeation rate obtained by this experiment is smaller than the result of the calculation model. A resistance factor is introduced to the present analysis in order to evaluate the influence of other H₂ transfer mechanisms, such as diffusion in Li-Pb and dissolution reaction between Ni and Li-Pb. The contribution of the resistance to the overall H₂ permeation rate becomes large when the flow rate of Li-Pb is low. This is because the boundary layer thickness between Ni and Li-Pb affects the overall H₂ permeation rate. When the flow velocity of Li-Pb is large, the thickness of the boundary layer becomes thin, and the driving force of H₂ permeation through Ni wall becomes large.

Original language	English
Pages (from-to)	658-661
Number of pages	4
Journal	Fusion Science and Technology
Volume	67
Issue number	3
DOIs	https://doi.org/10.13182/FST14-T104
Publication status	Published - Apr 1 2015

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All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Nuclear and High Energy Physics
Nuclear Energy and Engineering
Materials Science(all)
Mechanical Engineering

Cite this

Yoshimura, S., Yoshimura, R., Okada, M., Fukada, S., & Edao, Y. (2015). Study on hydrogen isotopes permeation in fluidized state of liquid lithium-lead. Fusion Science and Technology, 67(3), 658-661. https://doi.org/10.13182/FST14-T104

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abstract = "Hydrogen transfer under a fluidized condition of Li-Pb is investigated experimentally to design a Li-Pb blanket system. Li-Pb eutectic alloy flows through inside of a Ni tube in the experimental system, where H2 permeates into and out of the forced Li-Pb flow. The overall H2 permeation rate is analyzed using a mass balance model. Hydrogen atoms diffuse in Ni and Li-Pb. The steady-state H2 permeation rate obtained by this experiment is smaller than the result of the calculation model. A resistance factor is introduced to the present analysis in order to evaluate the influence of other H2 transfer mechanisms, such as diffusion in Li-Pb and dissolution reaction between Ni and Li-Pb. The contribution of the resistance to the overall H2 permeation rate becomes large when the flow rate of Li-Pb is low. This is because the boundary layer thickness between Ni and Li-Pb affects the overall H2 permeation rate. When the flow velocity of Li-Pb is large, the thickness of the boundary layer becomes thin, and the driving force of H2 permeation through Ni wall becomes large.",

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AU - Edao, Yuki

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N2 - Hydrogen transfer under a fluidized condition of Li-Pb is investigated experimentally to design a Li-Pb blanket system. Li-Pb eutectic alloy flows through inside of a Ni tube in the experimental system, where H2 permeates into and out of the forced Li-Pb flow. The overall H2 permeation rate is analyzed using a mass balance model. Hydrogen atoms diffuse in Ni and Li-Pb. The steady-state H2 permeation rate obtained by this experiment is smaller than the result of the calculation model. A resistance factor is introduced to the present analysis in order to evaluate the influence of other H2 transfer mechanisms, such as diffusion in Li-Pb and dissolution reaction between Ni and Li-Pb. The contribution of the resistance to the overall H2 permeation rate becomes large when the flow rate of Li-Pb is low. This is because the boundary layer thickness between Ni and Li-Pb affects the overall H2 permeation rate. When the flow velocity of Li-Pb is large, the thickness of the boundary layer becomes thin, and the driving force of H2 permeation through Ni wall becomes large.

AB - Hydrogen transfer under a fluidized condition of Li-Pb is investigated experimentally to design a Li-Pb blanket system. Li-Pb eutectic alloy flows through inside of a Ni tube in the experimental system, where H2 permeates into and out of the forced Li-Pb flow. The overall H2 permeation rate is analyzed using a mass balance model. Hydrogen atoms diffuse in Ni and Li-Pb. The steady-state H2 permeation rate obtained by this experiment is smaller than the result of the calculation model. A resistance factor is introduced to the present analysis in order to evaluate the influence of other H2 transfer mechanisms, such as diffusion in Li-Pb and dissolution reaction between Ni and Li-Pb. The contribution of the resistance to the overall H2 permeation rate becomes large when the flow rate of Li-Pb is low. This is because the boundary layer thickness between Ni and Li-Pb affects the overall H2 permeation rate. When the flow velocity of Li-Pb is large, the thickness of the boundary layer becomes thin, and the driving force of H2 permeation through Ni wall becomes large.

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10.13182/FST14-T104