Low tritium partial pressure permeation system for mass transport measurement in lead lithium eutectic

作者：Pawelko R J^*; Shimada M; Katayama K; Fukada S; Humrickhouse P W; Terai T

来源：Fusion Engineering and Design, 2016, 102: 8-13.

DOI：10.1016/j.fusengdes.2015.11.005

• Tritium
• Permeation
• Lead lithium eutectic
• Mass transfer properties

This paper describes a new experimental system designed to investigate tritium mass transfer properties in materials important to fusion technology. Experimental activities were carried out at the Safety and Tritium Applied Research (STAR) facility located at the Idaho National Laboratory (INL). The tritium permeation measurement system was developed as part of the Japan/US TITAN collaboration to investigate tritium mass transfer properties in liquid lead lithium eutectic (LLE) alloy. The experimental system is configured to measure tritium mass transfer properties at low tritium partial pressures. Initial tritium permeation scoping tests were conducted on a 1 mm thick alpha-Fe plate to determine operating parameters and to validate the experimental technique. A second series of permeation tests was then conducted with the alpha-Fe plate covered with an approximately 8.5 mm layer of liquid lead lithium eutectic alloy (alpha-Fe/LLE). We present preliminary tritium permeation data for alpha-Fe and alpha-Fe/LLE at temperatures between 400 and 600 degrees C and at tritium partial pressures between 1.7E-03 and 2.5 Pa in helium. Preliminary results for the alpha-Fe plate and alpha-Fe/LLE indicate that the data spans a transition region between the diffusion-limited regime and the surface-limited regime. Additional data is required to determine the existence and range of a surface-limited regime.

• 出版日期2016-1