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Report No.

Study on cavitation due to sub-surface vortex at intake of hot-leg pipe in sodium cooled fast reactor, 5; Measurement of circulation around hot leg pipe intake in complicated geometry

Ezure, Toshiki ; Ito, Kei; Kameyama, Yuri*; Kamide, Hideki 

Velocity measurements based on Particle Image Velocimetry were carried out in 1/22 scaled water model of sodium-cooled fast reactor to grasp velocity distributions around hot leg pipes. Circulation around sub-surface vortex was evaluated as an indicator of vortex strength using measured velocity distributions. As the results, it is confirmed the circulation normalized by the mean hot leg velocity was nearly constant and dose not depends on the variation of kinematic viscosity.



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