[1H13-16] Droplet and Liquid Film

[1H13] Countercurrent Flow Limitation in a Pressurizer Surge Line

*Michio Murase¹, Koji Nishida¹, Takayoshi Kusunoki¹, Raito Goda², Akio Tomiyama² (1. Institute of Nuclear Safety System, Inc., 2. Kobe University)

Keywords:Pressurizer surge line, Upper end of vertical pipe, Countercurrent flow limitation

Countercurrent flow limitation (CCFL) data recently reported for the sharp-edged upper end of vertical pipes and a pressurizer surge line were evaluated to confirm effects of those data on the previously proposed CCFL correlation. Inclusion of those data increased uncertainty of the CCFL constant in the Wallis type correlation, but effects on the previously proposed correlation were relatively small.