Measurements of velocity distribution in wire wrapped fuel assembly; Evaluation of reynolds number dependence in 3-pin bundle

Hiyama, Tomoyuki; Aizawa, Kosuke; Nishimura, Masahiro; Kurihara, Akikazu

no journal, , 

In this study, water experiments were carried out to investigate the velocity distribution in the wire wrapped pin bundle. The test section consists of an acrylic duct tube and fluorinated resin 3 pins which have nearly the same refractive index with that of water. The velocity distribution in the inner subchannel with the wrapping wire was measured by PIV. Furthermore, Reynolds number dependence to the velocity distribution in the inner subchannel was confirmed in the experiments.