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Methods for dependency estimation and system unavailability evaluation based on failure data statistics. Volume 2, Detailed description and applications
Azarm, M.A.; Hsu, F.; Martinez-Guridi, G.; Vesely, W.E. - 2008
-specific maintenance practices that reduce or increase the contribution of dependent failures to system unavailability. The proposed …This report introduces a new perspective on the basic concept of dependent failures where the definition of dependency …, it relaxes the conventional assumption that dependent failures must be simultaneous and result from a severe shock …
Persistent link: https://www.econbiz.de/10009435910
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Methods for dependency estimation and system unavailability evaluation based on failure data statistics. Volume 1, Summary report
Azarm, M.A.; Hsu, F.; Martinez-Guridi, G.; Vesely, W.E. - 2008
-specific maintenance practices that reduce or increase the contribution of dependent failures to system unavailability. The proposed …This report introduces a new perspective on the basic concept of dependent failures where the definition of dependency …, it relaxes the conventional assumption that dependent failures must be simultaneous and result from a severe shock …
Persistent link: https://www.econbiz.de/10009435403
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Risk-based maintenance modeling. Prioritization of maintenance importances and quantification of maintenance effectiveness
Vesely, W.E.; Rezos, J.T. - 2009
also are developed. The methods developed to quantify the reliability and risk effects of maintenance actions are … quantify the benefits of maintenance in correcting degradations and preventing failures. The negative effects of maintenance … obtained from plant maintenance logs and from the Nuclear Plant Reliability Data System (NPRDS). To explore the potential …
Persistent link: https://www.econbiz.de/10009435849
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Material degradation analysis and maintenance decisions based on material condition monitoring during in-service inspections
Yacout, A.M.; Orechwa, Y. - 2009
the risk adjusted economic penalty associated with different maintenance decisions. The approach of estimating the … probability, with confidence interval, of the time that a prescribed degradation level is exceeded is shown to be practical, as … demonstrated in the analysis of irradiated fuel cladding. The methodology for the estimation of the probability is predicated on …
Persistent link: https://www.econbiz.de/10009435687
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Analysis of extreme top event frequency percentiles based on fast probability integration
Staple, B.; Haskin, F.E. - 2008
resorting to large sample sizes. A promising altemative to these methods is the fast probability integration (FPI) methods … driving the top event frequency response in extreme probability regions. In this paper, FPI methods are adapted a) to …
Persistent link: https://www.econbiz.de/10009436381
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An overview of the evolution of human reliability analysis in the context of probabilistic risk assessment.
Bley, Dennis C.; Lois, Erasmia; Kolaczkowski, Alan M.; … - 2009
Since the Reactor Safety Study in the early 1970's, human reliability analysis (HRA) has been evolving towards a better …
Persistent link: https://www.econbiz.de/10009436720
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Participation of the Nuclear Power Plants in the New Brazilian Electric Energy Market
Mathias, S.G. - 2008
A new regulation framework has been established for the Brazilian electric energy market by a law put into effect on March 15,2004. The main overall goals of this new regulation are: to allow the lowest possible tariffs for end users, while providing the necessary economic incentives for the...
Persistent link: https://www.econbiz.de/10009435556
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Human decision error (HUMDEE) trees
Ostrom, L.T. - 2008
Graphical presentations of human actions in incident and accident sequences have been used for many years. However, for the most part, human decision making has been underrepresented in these trees. This paper presents a method of incorporating the human decision process into graphical...
Persistent link: https://www.econbiz.de/10009435378
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Vulnerability And Risk Assessment Using The Homeland-Defense Operational Planning System (HOPS)
Durling, Jr.; Price, D E; Spero, K K - 2008
For over ten years, the Counterproliferation Analysis and Planning System (CAPS) at Lawrence Livermore National Laboratory (LLNL) has been a planning tool used by U.S. combatant commands for mission support planning against foreign programs engaged in the manufacture of weapons of mass...
Persistent link: https://www.econbiz.de/10009435516
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OBEST: The Object-Based Event Scenario Tree Methodology
WYSS, GREGORY D.; DURAN, FELICIA A. - 2008
Event tree analysis and Monte Carlo-based discrete event simulation have been used in risk assessment studies for many years. This report details how features of these two methods can be combined with concepts from object-oriented analysis to develop a new risk assessment methodology with some...
Persistent link: https://www.econbiz.de/10009435938