A study on hydrogen isotopes transport in a liquid metal GaInSn by plasma-driven permeation method. (August 2017)

• Record Type: Journal Article
• Authors: Bi, Hailin; Hirooka, Yoshi; Yagi, Juro; Xu, Yue
• Is Part Of: Nuclear materials and energy. Volume 12(2017)
• Page Start: 329
• Page End: 333
• Publication Date: 2017-08
• Subjects: Liquid metal -- Plasma-driven permeation -- Diffusivity -- Recombination coefficient -- Retention; Nuclear energy -- Periodicals; Nuclear fuels -- Periodicals; Nuclear reactors -- Materials -- Periodicals; Radioactive substances -- Periodicals; 621.4833
• DOI: 10.1016/j.nme.2017.02.018
• Languages: English
• ISSNs: 2352-1791

Abstract

Highlights: A technique of holding a liquid metal on a mesh sheet for plasma-driven permeation experiment has been developed. Hydrogen isotopes diffusivity and recombination coefficients for liquid GaInSn have been obtained. Hydrogen isotopes retention in liquid GaInSn are found to be low. Abstract: The application of liquid metals such as gallium, tin and lithium as plasma-facing materials is a potential means to resolve the technical issues associated with power exhausting and particle handing in magnetic fusion devices. GaInSn alloy with melting point of 10.5 °C, is employed as a modeling material to explore the plasma-driven permeation (PDP) method to study the hydrogen isotopes (hydrogen and deuterium) transport parameters in a liquid metal. Static liquid GaInSn membranes sitting on a mesh sheet are exposed to hydrogen/deuterium plasmas in the linear plasma device VEHICLE-1 with the temperature range of 280–496 °C. Hydrogen/deuterium diffusivity are obtained by fitting the time evolutions of permeation fluxes. The dynamic hydrogen/deuterium retention in the liquid GaInSn are found to be low (∼10 15 D/cm 3 ), which are consistent with the thermal desorption spectroscopy (TDS) measurement following plasma exposure. The hydrogen and deuterium transport parameters are found to be close to each other.