Speaker
Juro Yagi
(Department of Helical Plasma Research)
Description
One of the major concerns for molten salt breeding blanket system is the low tritium solubility, high equilibrium tritium pressure in other words, of the molten salts including FLiBe, FLiNaBe and FLiNaK. Owing to this, vanadium alloy (V-4Cr-4Ti) has been thought to be inappropriate as a structure material in molten salt breeding blanket because of its high tritium solubility.
The concept of hydrogen absorbing metal powder mixture for molten salt proposed by Sagara (2014) is the promising method for this issue. The authors (2015) has already experimentally confirmed that titanium powder successfully increased the effective hydrogen solubility of molten salt FLiNaK in more than 5 orders and will suppress the hydrogen concentration in structure materials.
In this work, pure vanadium and vanadium alloy plates are immersed in titanium mixed FLiNaK stored in Ni crucible and hydrogen gas is supplied. Hydrogen inventory in the alloy is quantified by TDS followed by the cooling and removing solid FLiNaK. The effect of metal powder on the hydrogen transfer from gas phase to the vanadium plate through molten salt mixture is investigated to be presented in the conference.
Co-authors
Akio Sagara
(Department of Helical Plasma Research, National Institute for Fusion Science, Toki, Japan)
Juro Yagi
(Department of Helical Plasma Research, National Institute for Fusion Science, Toki, Japan)
Sadatsugu Takayama
(Department of Helical Plasma Research, National Institute for Fusion Science, Toki, Japan)
Takeo Muroga
(Department of Helical Plasma Research, National Institute for Fusion Science, Toki, Japan)
Takuya Goto
(Department of Helical Plasma Research, National Institute for Fusion Science, Toki, Japan)
Takuya Nagasaka
(Department of Helical Plasma Research, National Institute for Fusion Science, Toki, Japan)
Teruya Tanaka
(Department of Helical Plasma Research, National Institute for Fusion Science, Toki, Japan)
