Load and resistance factor design approach for seismic buckling of fast reactor vessels

Seismic buckling of vessels is one of the main concerns for the design of nuclear power plants in Japan. Rational design is important, especially for fast reactor plants. Although thicker walls are preferable in terms of prevention of seismic buckling, excessively thick walls cause unacceptable cree...

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Autores principales:	Shigeru TAKAYA, Naoto SASAKI, Tai ASAYAMA, Yoshio KAMISHIMA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2017
Materias:	lrfd target reliability partial safety factor seismic hazard fast reactor vessel Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/f5a56de309cd4d2097314854fbf13ba3
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spelling	oai:doaj.org-article:f5a56de309cd4d2097314854fbf13ba32021-11-26T07:03:57ZLoad and resistance factor design approach for seismic buckling of fast reactor vessels2187-974510.1299/mej.16-00558https://doaj.org/article/f5a56de309cd4d2097314854fbf13ba32017-03-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/4/3/4_16-00558/_pdf/-char/enhttps://doaj.org/toc/2187-9745Seismic buckling of vessels is one of the main concerns for the design of nuclear power plants in Japan. Rational design is important, especially for fast reactor plants. Although thicker walls are preferable in terms of prevention of seismic buckling, excessively thick walls cause unacceptable creep-fatigue interaction damage. In a previous study, we proposed an evaluation method for the seismic buckling probability of a reactor vessel considering seismic hazards and showed that among the random variables considered in the evaluation, seismic load had the most significant impact on buckling probability. This suggests that more rational vessel designs can be realized by taking appropriate account of seismic load variations. The load and resistance factor design (LRFD) method enables us to determine design factors corresponding to target reliability by considering the variations of random variables. Therefore, in this study, we used the LRFD method to develop a new design rule for the prevention of seismic buckling of vessels. The equation in the proposed rule is almost the same as that in the Japan Society of Mechanical Engineers fast reactor codes, but every random variable, seismic load and yield stress, has its own design factor. In addition, mean or median values are used in the evaluation instead of design values including conservativeness. The effectiveness of the new design rule was illustrated in comparison with the current provision.Shigeru TAKAYANaoto SASAKITai ASAYAMAYoshio KAMISHIMAThe Japan Society of Mechanical Engineersarticlelrfdtarget reliabilitypartial safety factorseismic hazardfast reactorvesselMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 4, Iss 3, Pp 16-00558-16-00558 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	lrfd target reliability partial safety factor seismic hazard fast reactor vessel Mechanical engineering and machinery TJ1-1570
spellingShingle	lrfd target reliability partial safety factor seismic hazard fast reactor vessel Mechanical engineering and machinery TJ1-1570 Shigeru TAKAYA Naoto SASAKI Tai ASAYAMA Yoshio KAMISHIMA Load and resistance factor design approach for seismic buckling of fast reactor vessels
description	Seismic buckling of vessels is one of the main concerns for the design of nuclear power plants in Japan. Rational design is important, especially for fast reactor plants. Although thicker walls are preferable in terms of prevention of seismic buckling, excessively thick walls cause unacceptable creep-fatigue interaction damage. In a previous study, we proposed an evaluation method for the seismic buckling probability of a reactor vessel considering seismic hazards and showed that among the random variables considered in the evaluation, seismic load had the most significant impact on buckling probability. This suggests that more rational vessel designs can be realized by taking appropriate account of seismic load variations. The load and resistance factor design (LRFD) method enables us to determine design factors corresponding to target reliability by considering the variations of random variables. Therefore, in this study, we used the LRFD method to develop a new design rule for the prevention of seismic buckling of vessels. The equation in the proposed rule is almost the same as that in the Japan Society of Mechanical Engineers fast reactor codes, but every random variable, seismic load and yield stress, has its own design factor. In addition, mean or median values are used in the evaluation instead of design values including conservativeness. The effectiveness of the new design rule was illustrated in comparison with the current provision.
format	article
author	Shigeru TAKAYA Naoto SASAKI Tai ASAYAMA Yoshio KAMISHIMA
author_facet	Shigeru TAKAYA Naoto SASAKI Tai ASAYAMA Yoshio KAMISHIMA
author_sort	Shigeru TAKAYA
title	Load and resistance factor design approach for seismic buckling of fast reactor vessels
title_short	Load and resistance factor design approach for seismic buckling of fast reactor vessels
title_full	Load and resistance factor design approach for seismic buckling of fast reactor vessels
title_fullStr	Load and resistance factor design approach for seismic buckling of fast reactor vessels
title_full_unstemmed	Load and resistance factor design approach for seismic buckling of fast reactor vessels
title_sort	load and resistance factor design approach for seismic buckling of fast reactor vessels
publisher	The Japan Society of Mechanical Engineers
publishDate	2017
url	https://doaj.org/article/f5a56de309cd4d2097314854fbf13ba3
work_keys_str_mv	AT shigerutakaya loadandresistancefactordesignapproachforseismicbucklingoffastreactorvessels AT naotosasaki loadandresistancefactordesignapproachforseismicbucklingoffastreactorvessels AT taiasayama loadandresistancefactordesignapproachforseismicbucklingoffastreactorvessels AT yoshiokamishima loadandresistancefactordesignapproachforseismicbucklingoffastreactorvessels
_version_	1718409755777564672

Load and resistance factor design approach for seismic buckling of fast reactor vessels

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