Hydrogen Permeation Through Fluoride Molten Salt Mixed with Ti Powder

Ryosuke Nishiumi; Satoshi Fukada; Jun Yamashita; Kazunari Katayama; Akio Sagara; Juro Yagi

doi:dx.doi.org/10.1080/15361055.2017.1347472

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Hydrogen Permeation Through Fluoride Molten Salt Mixed with Ti Powder

Ryosuke Nishiumi, Satoshi Fukada, Jun Yamashita, Kazunari Katayama, Akio Sagara, Juro Yagi

Fusion Science and Technology / Volume 72 / Number 4 / November 2017 / Pages 747-752

Technical Note / dx.doi.org/10.1080/15361055.2017.1347472

Received:August 16, 2016

Accepted:May 15, 2017

Published:October 19, 2017

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H₂ permeation behavior in a new molten salt of Flibe mixed with 0.5 wt% Ti powder is experimentally and analytically investigated. Ti powder included in Flibe can suppress H₂ permeation for 70 hours lower than the H₂ detection limit after the start of experiment. H₂ diffusion behavior in the Flibe+Ti system is analyzed using an unsteady-diffusion equation. The time delay of overall H₂ diffusion in the Flibe+Ti system is over 200 times larger than that in Flibe. The effective diffusivity and solubility in the Flibe+Ti system are determined from fitting the analytical solution to experimental H₂ permeation rates.