Cold Test and Performance Evaluation of Prototype Cryoline-X

[摘要] The multi-process pipe vacuum jacketed cryolines for the ITER project are probably world's most complex cryolines in terms of layout, load cases, quality, safety and regulatory requirements. As a risk mitigation plan, design, manufacturing and testing of prototype cryoline (PTCL) was planned before the approval of final design of ITER cryolines. The 29 meter long PTCL consist of 6 process pipes encased by thermal shield inside Outer Vacuum Jacket of DN 600 size and carries cold helium at 4.5 K and 80 K. The global heat load limit was defined as 1.2 W/m at 4.5 K and 4.5 W/m at 80 K. The PTCL-X (PTCL for Group-X cryolines) was specified in detail by ITER-India and designed as well as manufactured by Air Liquide. PTCL-X was installed and tested at cryogenic temperature at ITER-India Cryogenic Laboratory in 2016. The heat load at 4.5 K and 80 K, estimated using enthalpy difference method, was found to be approximately 0.8 W/m at 4.5 K, 4.2 W/m at 80 K, which is well within the defined limits. Thermal shield temperature profile was also found to be satisfactory. Paper summarizes the cold test results of PTCL-X.

[发布机构] ITER-India, Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar; 382 428, India^1;Air Liquide Advanced Technologies, Rue De Clémencière, 2, Sassenage; 38360, France^2

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Cryogenic temperatures;Enthalpy differences;Multi-Processes;Performance evaluations;Regulatory requirements;Risk mitigation;Temperature profiles;Thermal shields