Engineering validation for lithium target facility of the IFMIF under IFMIF/EVEDA project

Wakai, Eiichi  ; Kanemura, Takuji; Kondo, Hiroo; Hirakawa, Yasushi ; Ito, Yuzuru*; Higashi, Takuma*; Suzuki, Akihiro*; Fukada, Satoshi*; Yagi, Juro*; Tsuji, Yoshiyuki*; Ito, Takahiro*; Niitsuma, Shigeto*; Yoshihashi, Sachiko*; Watanabe, Kazuyoshi*; Furukawa, Tomohiro  ; Groeschel, F.*; Micciche, G.*; Mannori, S.*; Favuzza, P.*; Niiti, F.*; Heidinger, R.*; Terai, Takayuki*; Horiike, Hiroshi*; Sugimoto, Masayoshi; Ohira, Shigeru; Knaster, J.*; 4 of others*

The EVEDA (Engineering Validation and Engineering Design Activity) lithium test loop with the world's highest flow rate was constructed and has been operated mainly at 250C. It succeeded in generating a 100 mm wide and 25 mm thick free-surface lithium flow along a concave back plate steadily at a high-speed of 15 m/s at 250C for 1,300 h under the Broader Approach Activities. A new wave height measuring method (laser-probe method) was developed for measurements of the 3D geometry of the liquid Li target surface. Using the device, the stability of the Li flow (the thickness variation of 1 mm or less) required for the actual liquid Li target of the IFMIF was satisfied and the feasibility of the long-term stable liquid Li flow was verified. The results of the other engineering validation tests such as lithium purification tests and the engineering design of lithium facility have also been evaluated and summarized.