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Nishino, Hiroyuki; Yamano, Hidemasa; Kurisaka, Kenichi
Mechanical Engineering Journal (Internet), 5(4), p.18-00079_1 - 18-00079_17, 2018/08
Watanabe, Norio
Nihon Genshiryoku Gakkai Wabun Rombunshi, 3(4), p.396 - 406, 2004/12
The U. S. Nuclear Regulatory Commission has been carrying out the Accident Sequence Precursor (ASP) Program to identify and categorize precursors to potential severe core damage accident sequences using the PSA technique. The ASP Program has identified a lot of risk significant events as precursors that occurred at U. S. nuclear power plants. The results from the ASP Program include valuable information that could be useful for obtaining risk significant insights and for monitoring risk trends in nuclear power industry. The present study examines and discusses quantitative risk trends for the industry level, using two indicators, that is, the occurrence frequency of precursors and the annual core damage probability, deriving from the ASP analysis results. It is shown that the core damage risk at U.S. nuclear power plants has been lowered and the likelihood of risk significant events has been remarkably decreasing. Also, the present study demonstrates that two risk indicators used here can provide quantitative information useful for monitoring risk trends in nuclear power industry.
Uchiyama, Tomoaki; Oikawa, Tetsukuni; Kondo, Masaaki; Watanabe, Yuichi*; Tamura, Kazuo*
JAERI-Data/Code 2002-011, 205 Pages, 2002/03
JAERI-Data-Code-2002-011.pdf:8.52MB
This report is a user's manual of seismic system reliability analysis code SECOM2 developed at the JAERI for system reliability analysis, which is one of the tasks of seismic probabilistic safety assessment (PSA) of nuclear power plants (NPPs). The SECOM2 code has many functions such as calculation of component and system failure probabilities for given seismic motion levels at the site of an NPP based on the response factor method, calculation of accident sequence frequencies and the core damage frequency (CDF), importance analysis using various indicators, uncertainty analysis, and calculation of the CDF taking into account the effect of the correlations of responses and capacities of components. These analyses require the fault tree (FT) representing the occurrence condition of the system failures and core damage, information about responses and capacities of the components which compose the FT, and seismic hazard curve for the NPP site as input. This report presents calculation method used in the SECOM2 code and how to use those functions in the SECOM2 code.
JAERI-Research 99-016, 84 Pages, 1999/03
JAERI-Research-99-016.pdf:2.97MB
no abstracts in English
Sugimoto, Jun; Hashimoto, Kazuichiro*; Yamano, Norihiro; Hidaka, Akihide; Maruyama, Yu; Uetsuka, Hiroshi; Fuketa, Toyoshi; Nakamura, Takehiko; Soda, Kunihisa; Katanishi, Shoji*
Nihon Genshiryoku Gakkai-Shi, 39(2), p.123 - 134, 1997/02
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
Iwamura, Takamichi; Araya, Fumimasa; Murao, Yoshio
Journal of Nuclear Science and Technology, 33(4), p.316 - 326, 1996/04
Times Cited Count：1 Percentile：14.44(Nuclear Science & Technology)no abstracts in English
Sobajima, Makoto; ; Kondo, Masaaki; *; Muramatsu, Ken;
10th Pacific Basin Nuclear Conf. (10-PBNC), 1, p.629 - 636, 1996/00
no abstracts in English
Sugimoto, Jun
Dennetsu Kenkyu, 34(133), p.52 - 59, 1995/04
no abstracts in English
Pellet;
JAERI-M 85-199, 16 Pages, 1985/12
no abstracts in English
JAERI-M 85-197, 95 Pages, 1985/12
no abstracts in English
; *
JAERI-M 84-055, 454 Pages, 1984/03
no abstracts in English
; ; Murao, Yoshio; ; ; ; ; ; ; Ueda, Shuzo; et al.
JAERI-M 82-039, 201 Pages, 1982/05
no abstracts in English
; ; ; Shimooke, Takanori
Nucl.Eng.Des., 69(1), p.37 - 42, 1982/00
Times Cited Count：2 Percentile：32.87(Nuclear Science & Technology)no abstracts in English
Nishi, Yoshihisa*; Arai, Kenji*; Oikawa, Hirohide*; Fujii, Tadashi*; Umezawa, Shigemitsu*; Yamada, Hidetomo*; Nakamura, Hideo
no journal, ,
no abstracts in English
Madokoro, Hiroshi; Yamashita, Takuya; Sato, Ikken
no journal, ,
Kurisaka, Kenichi
no journal, ,
Nishiwaki, Takafumi*; Ogawa, Koji*; Aoki, Kazuhiro; Yoshida, Takumi
no journal, ,
Various physical and mechanical tests were performed on shallow borehole cores (
30 m) taken from the activated Shionohira and the non-activated Kuruma faults associated with the April 2011 Fukushima-ken Hamadori earthquake. The results showed (1) low strength constants and elastic constants for the fault damage zone samples compared to the host rocks; (2) different physical properties for fault gouge, fault breccia, and Cataclasite of the fault damage zone; and (3) for fault gouge, the importance of considering the stress factor on the fault plane. Data accumulation from various fault damage zones is needed to gain better understanding of the physical properties of the fault damage zone.
