Characteristics of heat transfer inside tube during sodium-water reaction in FBR steam generator

Kurihara, Akikazu; Ohshima, Hiroyuki; Monde, Masanori*

Nihon Kikai Gakkai Rombunshu, B, 76(763), p.442 - 444, 2010/03

Sodium reacts chemically with water in the case of the unexpected tube failure of a steam generator (SG) in a fast breeder reactor (FBR). It is integral in order to predict the event with high accuracy to understand the characteristics of heat transfer inside a tube in detail during the tube failure (sodium-water reaction). Experiments were performed using purified water under the following conditions; initial pressure of 11.2-13.4 MPa, initial water temperature of 200 C and water mass flux of 45.7-3630 kg/(ms). A test tube was heated rapidly by high frequency induction current. The time averaged heat flux was estimated using an inverse solution from the measured temperatures at two points on three different locations along the tube. It was confirmed that the derived values agreed with measured heat fluxes on the outer surface within 20% accuracy. It was found that the characteristics of the heat transfer strongly depended on the flow rate. The heat transfer on the wall changed from nucleate boiling to transient-film boiling during increasing the heat flux and returned to the nucleate boiling during decreasing the heat input. A counterclockwise cycle always appeared in the transition boiling region, where the nucleate and film boiling coexisted and the area ratio of these varied with time. The adequacy of heat transfer correlations to evaluate tube overheating were confirmed.

Experimental investigation of characteristics of impinging jet heat transfer and application to JSNS moderator design

Aso, Tomokazu; Monde, Masanori*; Sato, Hiroshi; Hino, Ryutaro; Tatsumoto, Hideki; Kato, Takashi

Nihon Genshiryoku Gakkai Wabun Rombunshi, 5(3), p.179 - 189, 2006/09

https://doi.org/10.3327/taesj2002.5.179

no abstracts in English

New-type neutron source with proton accelerator and its application

Hino, Ryutaro; Yokomizo, Hideaki; Yamazaki, Yoshishige; Hasegawa, Kazuo; Suzuki, Hiromitsu; Soyama, Kazuhiko; Hayashi, Makoto*; Haga, Katsuhiro; Kaminaga, Masanori; Sudo, Yukio*; et al.

Nihon Kikai Gakkai-Shi, 107(1032), p.851 - 882, 2004/11

http://ci.nii.ac.jp/naid/110004822312

no abstracts in English

Thermal-hydraulic experiments and analyses of coupled moderator vessel for spallation neutron source

Aso, Tomokazu; Sato, Hiroshi; Kaminaga, Masanori; Hino, Ryutaro; Monde, Masanori*

Nihon Kikai Gakkai Kanto Shibu Ibaraki Koenkai (2003) Koen Rombunshu (No.030-3), p.45 - 46, 2003/09

no abstracts in English

Thermal-hydraulic experiments and analyses for cold moderators

Aso, Tomokazu; Kaminaga, Masanori; Hino, Ryutaro; Monde, Masanori*

Proceedings of 11th International Conference on Nuclear Engineering (ICONE-11) (CD-ROM), 8 Pages, 2003/04

no abstracts in English

Analytical study of narrow channel flow for a spallation target system design

Islam, M. S.*; Terada, Atsuhiko*; Kinoshita, Hidetaka; Hino, Ryutaro; Monde, Masanori*

JAERI-Tech 2001-044, 49 Pages, 2001/07

JAERI-Tech-2001-044.pdf:2.49MB

no abstracts in English

Experimental study on heat transfer augmentation for high heat flux removal in rib-roughened narrow channels

M.S.Islam*; Hino, Ryutaro; Haga, Katsuhiro; Monde, Masanori*; Sudo, Yukio

JAERI-Tech 97-032, 49 Pages, 1997/07

JAERI-Tech-97-032.pdf:1.53MB

no abstracts in English

Current trends of thermal-hydraulic research on severe accident

Nariai, Hideki*; Sugiyama, Kenichiro*; Kataoka, Isao*; Mishima, Kaichiro*; *; Monde, Masanori*; Sugimoto, Jun; ; Hidaka, Akihide; *; et al.

Nihon Genshiryoku Gakkai-Shi, 39(9), p.739 - 752, 1997/00

https://doi.org/10.3327/jaesj.39.739

no abstracts in English

Heat transfer characteristics of rapidly heating tube in FBR steam generator

Kurihara, Akikazu; Shimoyama, Kazuhito; Monde, Masanori*; Ohshima, Hiroyuki

no journal, , 

Sodium reacts chemically with water in case of unexpected tube failure of steam generator (SG) in fast breeder reactor (FBR), exoergic reaction produced reaction field with high temperature and high corrosive (sodium-water reaction). Adjacent tubes in the field have possibility of rupture by inner pressure. It is integral to predict the event with high accuracy that we understand characteristics of heat transfer inside tube in detail. Experimental study has been carried out and clarify characteristics of heat flux and temperature on inner wall under low mass flow rate and high subcooling.

Rapid vapor generation during contact of a liquid droplet with a hot surface

Nishida, Takuya*; Mitsutake, Yuichi*; Monde, Masanori*; Kurihara, Akikazu

no journal, , 

Rapid vapor generation during impact of a single ethanol droplet on a hot surface was observed for well understanding of wetting phenomena. Photographs during a single droplet impacting on a surface at 190-210 C were taken by a high speed digital camera with a microscope. Copper and carbon steel were used for the surface material. The liquid subcooling was varied from 10 to 50 K. The boiling situation changes from nucleate boiling to film boiling like as the boiling transition in pool boiling. Delay time to develop vapor film on the hot surface was measured from the observations. While the delay time increases with increase of subcooling and decrease of thermal inertia of the soild for the lower surface temperature, it shows constant for the higher surface temperature above the superheat limit of liquid.