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Katsuyama, Jinya; Yamaguchi, Yoshihito; Nemoto, Yoshiyuki; Furuta, Takuya; Kaji, Yoshiyuki
Proceedings of ASME 2022 Pressure Vessels and Piping Conference (PVP 2022) (Internet), 9 Pages, 2022/07
Katsuyama, Jinya; Uno, Shumpei*; Watanabe, Tadashi*; Li, Y.
Frontiers of Mechanical Engineering, 13(4), p.563 - 570, 2018/12
Times Cited Count：2 Percentile：12.01(Engineering, Mechanical)For the structural integrity assessments on reactor pressure vessels (RPVs) under pressurized thermal shock (PTS) events, thermal hydraulic (TH) behavior of coolant water is one of the most important influence factors. Configuration of plant equipment and their dimensions, and operator action have large influences on TH behavior. In this study, to investigate the influence of operator action on TH behavior during a PTS event, we developed an analysis model for a typical Japanese plant, and performed TH and structural analyses. Two different operator action times were assumed based on the Japanese and US' rules. From the analysis results, it was clarified that differences in operator action times have a significant effect on TH behavior and loading conditions, that is, following the Japanese rule may lead to lower stresses compared to that when following the US rule because earlier operator action caused lower pressure in the RPV.
Yuguchi, Takashi; Sasao, Eiji; Ishibashi, Masayuki; Nishiyama, Tadao*
American Mineralogist, 100(5-6), p.1134 - 1152, 2015/05
Times Cited Count：33 Percentile：73.58(Geochemistry & Geophysics)This paper describes the biotite chloritization process with a focus on mass transfer in the Toki granitic pluton, Central Japan, and also depicts the temporal variations in chemical characteristics of hydrothermal fluid associated with chloritization during the sub-solidus cooling of the pluton. Singular value decomposition (SVD) analysis results in chloritization reaction equations for eight mineral assemblages, leading to the quantitative assessment of mass transfer between the reactant and product minerals, and inflow and outflow of components through the hydrothermal fluid. The matrices for SVD analysis consist of arbitrary combinations of molar volume and closure component in the reactant and product minerals. The eight reactions represent the temporal variations of chemical characteristics of the hydrothermal fluid associated with chloritization: the progress of chloritization results in gradual increase of silicon, potassium and chlorine and gradual decrease of calcium and sodium in the hydrothermal fluid with temperature decrease. The biotite chloritization involves two essential formation processes: Formation Process 1, small volume decrease from biotite to chlorite and large inflow of metallic ions from the hydrothermal fluid, and Formation Process 2, large volume decrease and large outflow of metallic ions into hydrothermal fluid. Chlorite produced during Formation Process 1 dominates over that of Formation Process 2, resulting in the gradual decrease of metallic components in the hydrothermal fluid with chloritization progress. The combination of continuous reactions based on compositional variations in chlorite together with corresponding continuous Al
variations gives an indication of the temporal variations in rates of decreasing and increasing concentration of chemical components in the hydrothermal fluid associated with chloritization.
Yonomoto, Taisuke; Otsu, Iwao; Nakamura, Hideo; Kondo, Masaya; Svetlov, S.*
Nihon Kikai Gakkai Dai-8-Kai Doryoku, Enerugi Gijutsu Shimpojiumu Koen Rombunshu, p.215 - 220, 2002/06
no abstracts in English
Asahi, Yoshiro
JAERI-Data/Code 2002-002, 332 Pages, 2002/03
JAERI-Data-Code-2002-002.pdf:10.6MB
no abstracts in English
Konishi, Satoshi
Fusion Engineering and Design, 58-59, p.1103 - 1107, 2001/11
Times Cited Count：6 Percentile：44.06(Nuclear Science & Technology)no abstracts in English
Asahi, Yoshiro; Okumura, Keisuke; Ose, Yasuo*
Nuclear Science and Engineering, 139(1), p.78 - 95, 2001/09
Times Cited Count：1 Percentile：11.99(Nuclear Science & Technology)no abstracts in English
; *; Tokizawa, Takayuki; *
JNC TY6400 2000-013, 102 Pages, 2000/02
JNC-TY6400-2000-013.pdf:2.45MB
None
Sato, Takeshi; Tamaki, Hitoshi
JAERI-Data/Code 2000-009, p.120 - 0, 2000/02
JAERI-Data-Code-2000-009.pdf:5.06MB
no abstracts in English
*; Watanabe, Norio; Hirano, Masashi
JAERI-Data/Code 98-037, 193 Pages, 1998/11
JAERI-Data-Code-98-037.pdf:6.14MB
no abstracts in English
Suzudo, Tomoaki; Tuerkcan, E.*; H.Verhoef*
Nuclear Science and Engineering, 129(2), p.203 - 208, 1998/06
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
B.Basoglu*; Yamamoto, Toshihiro; ; Nomura, Yasushi
JAERI-Data/Code 98-011, 89 Pages, 1998/03
JAERI-Data-Code-98-011.pdf:4.02MB
no abstracts in English
Sato, Takashi; Watanabe, Hironori; Araya, Fumimasa; Nakajima, Katsutoshi; Iwamura, Takamichi; Murao, Yoshio
JAERI-Research 98-006, 77 Pages, 1998/02
JAERI-Research-98-006.pdf:3.27MB
no abstracts in English
PNC TJ1412 97-002, 157 Pages, 1997/03
None
Okubo, Tsutomu; Araya, Fumimasa; Iwamura, Takamichi; Kusunoki, Tsuyoshi
Fourth Int. Seminar on Subchannel Analysis (ISSCA-4), p.267 - 286, 1997/00
no abstracts in English
Abe, Kiyoharu
Tokyo Daigaku Gakui Rombun, 0, 245 Pages, 1994/09
no abstracts in English
