Flibe-D₂ Permeation Experiment and Analysis

Experiment of D₂ permeation through Ni facing with purified Flibe is being carried out under the Japan-US joint research project (JUPITER-II). The experiment is proceeding in the following phases; (i) fabrication and assembly of a dual-probe permeation apparatus, (ii) a single-probe Ni/D₂ permeation experiment without Flibe, (iii) a dual-probe Ni/D₂ permeation experiment without Flibe, (iv) Flibe chemical purification by HF/H₂ gas bubbling, (v) physical purification by Flibe transport through a porous Ni filter, (vi) Ni/Flibe/D₂ permeation experiment, and (vii) Ni/Flibe/HT permeation experiment. The present paper describes results of the single and dual Ni/D₂ permeation experiments in detail.