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Yoshida, Hiroyuki; Horiguchi, Naoki; Ono, Ayako; Furuichi, Hajime*; Katono, Kenichi*
Proceedings of 29th International Conference on Nuclear Engineering (ICONE 29) (Internet), 7 Pages, 2022/08
Katono, Kenichi*; Tamai, Hidesada*; Nagayoshi, Takuji*; Ito, Takashi*; Takase, Kazuyuki
Proceedings of 8th Japan-Korea Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS-8) (USB Flash Drive), 8 Pages, 2012/12
no abstracts in English
Tamai, Hidesada; Nagayoshi, Takuji; Katono, Kenichi; Ito, Takashi; Takase, Kazuyuki
Proceedings of 7th International Conference on Multiphase Flow 2010 (ICMF 2010) (CD-ROM), 7 Pages, 2010/05
For the design the natural-circulation type BWR that utilizes the FSS concept, the development of a predictive model for the droplets entrained with the steam (carryover) from the free surface is indispensable. In this paper, the droplet quality was measured with a throttling calorimeter that could measure the droplet quality based on the isenthalpic process between wet and superheated steam through the throttle. The measurements were carried out under the conditions of a pressure of 1.5-2.5 MPa. The temperature of the superheated steam after passing through the throttle was confirmed to be strongly related to the quality of the wet steam. A modified model based on the measurements proved to be capable of predicting the droplet quality within the range of the database. Evaluating the droplet quality under BWR conditions validated the feasibility of the design of the natural-circulation type BWR that utilizes the FSS concept.
Tamai, Hidesada; Nagayoshi, Takuji; Katono, Kenichi; Ito, Takashi; Takase, Kazuyuki
Nihon Konsoryu Gakkai Nenkai Koenkai 2009 Koen Rombunshu, P. 2, 2009/08
The characteristics of carryover from free-surface in a natural-circulation BWR are an important subject to be resolved for economic and safe design of the reactor. In this study, droplet quality of the carryover in a test section with 0.12 m in diameter was measured using throttling calorimeter with pressure ranging from 1.5-2.5 MPa. The measured droplet quality increases with decrease in distance from free-surface and with increase in vapor volumetric flux, and these trends are similar to those of previous data.
Onuki, Akira; Nakagawa, Masaki*; Nagayoshi, Takuji*; Tamai, Hidesada; Katono, Kenichi*
no journal, ,
no abstracts in English
Nagayoshi, Takuji*; Tamai, Hidesada; Katono, Kenichi*; Nakagawa, Masaki*; Onuki, Akira
no journal, ,
no abstracts in English
Tamai, Hidesada; Nagayoshi, Takuji*; Katono, Kenichi*; Nakagawa, Masaki*; Onuki, Akira
no journal, ,
no abstracts in English
Tamai, Hidesada; Nagayoshi, Takuji; Katono, Kenichi; Nakagawa, Masaki; Onuki, Akira
no journal, ,
no abstracts in English
Tamai, Hidesada; Nagayoshi, Takuji; Katono, Kenichi; Ito, Takashi; Takase, Kazuyuki
no journal, ,
no abstracts in English
Tamai, Hidesada; Nagayoshi, Takuji; Katono, Kenichi; Ito, Takashi; Takase, Kazuyuki
no journal, ,
no abstracts in English
Tamai, Hidesada; Nagayoshi, Takuji; Katono, Kenichi; Ito, Takashi; Takase, Kazuyuki
no journal, ,
no abstracts in English
Katono, Kenichi; Nagayoshi, Takuji; Tamai, Hidesada; Takase, Kazuyuki; Ito, Takashi
no journal, ,
no abstracts in English
Tamai, Hidesada; Nagayoshi, Takuji; Katono, Kenichi; Ito, Takashi; Takase, Kazuyuki
no journal, ,
no abstracts in English
Aoyama, Goro*; Nagayoshi, Takuji*; Katono, Kenichi*; Baba, Atsushi*; Tamai, Hidesada; Takase, Kazuyuki
no journal, ,
no abstracts in English
Yoshida, Hiroyuki; Nagatake, Taku; Ono, Ayako; Narushima, Yuki*; Katono, Kenichi*
no journal, ,
no abstracts in English
Horiguchi, Naoki; Yoshida, Hiroyuki; Narushima, Yuki*; Katono, Kenichi*
no journal, ,
Droplet entrainment and deposition in annular dispersed flow are important phenomena to predict dryout phenomena. Many correlation equations have been proposed to determine the coefficients of entrainment and deposition, but the clarification of entrainment and deposition phenomena is an issue because of the complexity of them and the difficulty of experiments. Detailed numerical simulation is useful for it but requires validation using the correlation equations. In this presentation, we explain the results of the detailed numerical simulation of droplet entrainment and deposition phenomena in annular dispersed flow using TPFIT developed by JAEA and the comparison of the coefficients quantified from the numerical simulation data with the ones using the correlation equations.