Gas entrainment phenomenon from free liquid surface in a sodium-cooled fast reactor; Measurements and evaluation on a gas core growth form the liquid surface

Uchida, Mao*; Alzahrani, H.*; Shiono, Mikihito*; Sakai, Takaaki*; Matsushita, Kentaro; Ezure, Toshiki; Tanaka, Masaaki

Proceedings of 19th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-19) (Internet), 16 Pages, 2022/03

Gas entrainment from cover gas is one of key issues for sodium-cooled fast reactors design to prevent unexpected effects to core reactivity. A vortex model based evaluation method has been developed to evaluate the surface vortex gas core growth at the free surface in the reactor vessel. In this study, water experiments were performed to clarify the prediction accuracy for the vortex gas core growth during the vortex drift motion using a circulating water tunnel with an open flow channel test section. Gas core growth were predicted by applying the evaluation method to the numerical analyses performed in the same geometry of the experiments, and compared with the experimental results. It was observed the gas core growth became large at downstream region where downward velocity became large in experiment. However, the gas core length which were predicted from numerical result showed a discrepancy with the experimental result on the peak position and an overestimation of peak value.

AVS/Express (Application Visualization System) User's Guide

Kato, Katsumi*; Kume, Etsuo

JAERI-Data/Code 2002-019, 116 Pages, 2002/09

JAERI-Data-Code-2002-019.pdf:26.15MB

no abstracts in English

Experimental analysis for 3-D flow in lower plenum by flow visualization

Kunii, Katsuhiko

Flow Visualization and Image Processing 1997, Vol.2, p.592 - 597, 1997/02

no abstracts in English

Application of neutron radiography to visualization of cryogenic fluid boiling two-phase flows

Takenaka, Nobuyuki*; Asano, Hitoshi*; Fujii, Terushige*; Ushiro, Toshihiko*; Iwatani, Junji*; Murata, Yutaka*; Mochiki, Koichi*; Taguchi, Akira*; Matsubayashi, Masahito; Tsuruno, Akira

Nuclear Instruments and Methods in Physics Research A, 377(1), p.174 - 176, 1996/07

https://doi.org/10.1016/0168-9002(96)00138-6

no abstracts in English

Application of neutron radiography to diagnosises of a refrigerator

; ; Fujii, Terushige*; ; ; ; Matsubayashi, Masahito; Tsuruno, Akira

Fifth World Conf. on Neutron Radiography, 0, p.623 - 629, 1996/00

no abstracts in English

Musashi image processing system for dynamic neutron radiography

; ; ; ; Matsubayashi, Masahito; Tsuruno, Akira

Nuclear Instruments and Methods in Physics Research A, 377, p.130 - 132, 1996/00

https://doi.org/10.1016/0168-9002(96)00148-9

no abstracts in English

Void fraction distribution measurement in two-phase flow by real-time neutron radiography and real-time image processing

; ; Fujii, Terushige*; ; ; ; Matsubayashi, Masahito; Tsuruno, Akira

Nuclear Instruments and Methods in Physics Research A, 377, p.153 - 155, 1996/00

https://doi.org/10.1016/0168-9002(96)00133-7

no abstracts in English

Visualization and correlation analysis of counter-current two-phase flow in a thermosyphon by neutron radiography

Tsuji, Yoshiyuki*; ; ; ; ; ; Matsubayashi, Masahito; Fujine, Shigenori*

Nuclear Instruments and Methods in Physics Research A, 377, p.148 - 152, 1996/00

https://doi.org/10.1016/0168-9002(96)00132-5

no abstracts in English

Application of neutron radiography to a diagnosis of refrigerator

; ; Fujii, Terushige*; ; ; ; Matsubayashi, Masahito; Tsuruno, Akira

Nuclear Instruments and Methods in Physics Research A, 377, p.170 - 173, 1996/00

https://doi.org/10.1016/0168-9002(96)00137-4

no abstracts in English

Measurement of temperature distribution using fluorescence

Kubo, Shinji; Akino, Norio; Akiyama, Mitsunobu*;

Dai-31-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu, 0, p.373 - 375, 1994/05

no abstracts in English