Measurement of lithium target surface velocity in the IFMIF/EVEDA lithium test loop

作者：Kanemura Takuji^*; Kondo Hiroo; Furukawa Tomohiro; Hirakawa Yasushi; Hoashi Eiji; Yoshihashi Sachiko; Horiike Hiroshi; Wakai Eiichi

来源：Fusion Engineering and Design, 2016, 109: 1682-1686.

DOI：10.1016/j.fusengdes.2015.10.030

• IFMIF
• EVEDA
• Lithium
• Jet
• Surface velocity
• Measurement

In the framework of the Engineering Validation and Engineering Design Activities (EVEDA) project of the International Fusion Materials Irradiation Facility (IFMIF), we measured surface velocity fields of a lithium (Li) target at the EVEDA Li test loop under specifically-designated IFMIF conditions (target speeds of 10, 15, and 20 m/s, vacuum pressure of 10(-3) Pa, and Li temperature of 250 degrees C). In the current design of the IFMIF, the free surface of the Li target is under a most severe heat load condition with respect to Li boiling. The objective of this study is to measure the actual free-surface velocity under these IFMIF conditions to evaluate the heat removal performance of the Li target. The measured results (using the surface-wave tracking method that our team developed) showed two-dimensional time-averaged velocity distributions around the IFMIF beam footprint being virtually uniform, and close to the cross-sectional average velocity. The uniformity of the velocity distributions was less than 1 m/s. The comparison between the measured and analyzed surface velocity at the beam center showed that the analysis accurately predicts the measurement results within a margin of 3%. Finally, it was confirmed that the Li target delivers adequate heat removal performance in the IFMIF as designed.

• 出版日期2016-11-1