Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fault and Event Tree Analyses for Process Systems Risk Analysis Uncertainty Handling Formulations written by Refaul Ferdous and published by Infinite Study. This book was released on with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantitative risk analysis (QRA) is a systematic approach for evaluating likelihood, consequences, and risk of adverse events. QRA based on event (ETA) and fault tree analyses (FTA) employs two basic assumptions. The first assumption is related to likelihood values of input events, and the second assumption is regarding interdependence among the events (for ETA) or basic events (for FTA).
Download or read book NUREG CR written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1977 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fault Tree Analysis written by and published by . This book was released on 2000 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains references to documents in the NASA Scientific and Technical Information (STI) Database.
Download or read book Fault Tree Handbook written by W. E. Vesely and published by Nuclear Regulatory Commission. This book was released on 1981 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed to serve as a text for the System Safety and Reliability Analysis course presented to Nuclear Regulatory Commission personnel and contractors. Codifies and systematizes the fault tree approach, a deductive failure analysis which focuses on one particular undesired event and provides a method for determining the causes of that event.
Download or read book Systems Analysis Programs for Hands On Integrated Reliability Evaluations SAPHIRE Technical Reference written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Systems Analysis Programs for Hands-on Integrated Reliability Evaluations (SAPHIRE) is a software application developed for performing a complete probabilistic risk assessment (PRA) using a personal computer (PC) running the Microsoft Windows? operating system. Herein information is provided on the principles used in the construction and operation of Version 6.0 and 7.0 of the SAPHIRE system. This report summarizes the fundamental mathematical concepts of sets and logic, fault trees, and probability. This volume then describes the algorithms used to construct a fault tree and to obtain the minimal cut sets. It gives the formulas used to obtain the probability of the top event from the minimal cut sets, and the formulas for probabilities that apply for various assumptions concerning reparability and mission time. It defines the measures of basic event importance that SAPHIRE can calculate. This volume gives an overview of uncertainty analysis using simple Monte Carlo sampling or Latin Hypercube sampling, and states the algorithms used by this program to generate random basic event probabilities from various distributions. Also covered are enhance capabilities such as seismic analysis, cut set "recovery," end state manipulation, and use of "compound events."
Download or read book Confronting Climate Uncertainty in Water Resources Planning and Project Design written by Patrick A. Ray and published by World Bank Publications. This book was released on 2015-08-20 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Confronting Climate Uncertainty in Water Resources Planning and Project Design describes an approach to facing two fundamental and unavoidable issues brought about by climate change uncertainty in water resources planning and project design. The first is a risk assessment problem. The second relates to risk management. This book provides background on the risks relevant in water systems planning, the different approaches to scenario definition in water system planning, and an introduction to the decision-scaling methodology upon which the decision tree is based. The decision tree is described as a scientifically defensible, repeatable, direct and clear method for demonstrating the robustness of a project to climate change. While applicable to all water resources projects, it allocates effort to projects in a way that is consistent with their potential sensitivity to climate risk. The process was designed to be hierarchical, with different stages or phases of analysis triggered based on the findings of the previous phase. An application example is provided followed by a descriptions of some of the tools available for decision making under uncertainty and methods available for climate risk management. The tool was designed for the World Bank but can be applicable in other scenarios where similar challenges arise.
Download or read book Fault Tree Handbook written by W. E. Vesely and published by CreateSpace. This book was released on 2014-06-12 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1975, a short course entitled "System Safety and Reliability Analysis" has been presented to over 200 NRC personnel and contractors.
Download or read book Lecture Notes on Fault Tree Analysis Concepts written by National Centre of Systems Reliability and published by . This book was released on 198? with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Generic Event Trees and the Treatment of Dependencies and Non proceduralized Actions in a Low Power and Shutdown Probabilistic Risk Assessment written by and published by . This book was released on 1993 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sandia National Laboratories was tasked by the US Nuclear Regulatory Commission to perform a Probabilistic Risk Assessment (PRA) of a boiling water reactor (BWR) during low power and shutdown (LP & S) conditions. The plant chosen for the study was Grand Gulf Nuclear Station (GGNS), a BWR 6. In performing the analysis, it was found that in comparison with full-power PRAs, the low decay heat levels present during LP & S conditions result in a relatively large number of ways by which cooling can be provided to the core. In addition, because of the less stringent requirements imposed on system configurations possible is large and the availability of plant systems is more difficult to specify. These aspects of the LP & S environment led to the development and use of ''generic'' event trees in performing the analysis. The use of ''generic'' event trees, in turn, had a significant impact on the nature of the human reliability analysis (HRA) that was performed. This paper describes the development of the event trees for the LP & S PRA and important aspects of the resulting HRA.
Download or read book Use of Fault Trees for Operations and Systems written by and published by . This book was released on 1996 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fault tree is a type of hazard analysis used to graphically show all the events and conditions that must occur in order for a specific hazardous event to happen. If the probabilities of all the conditioning events are known or can be reasonably approximated, a quantitative value for the hazard can be given. The graphical nature of the fault tree allows the reader to see the events that make up the hazard and concentrate on reducing the probability of major contributors. Fault trees are also especially adept at recognizing single-point failures. Fault trees have been used in the government for a long time. The pioneer of the technique was in the safety analysis of nuclear reactors in the 1960s. Many refinements have been made and the standardization of the symbols and process are firmly entrenched. With the incorporation of computer software, fault trees have become much easier to create, no longer requiring recopying whenever an error is found or an event added. Also, computers have eliminated the arduous process of calculating the probability of the top event by Boolean algebra. Currently, fault trees are being used for both operations (movement of ton containers from CASY to the CTF2) and with systems (XM998 Smoke Grenades) at ERDEC. The graphical presentation of the fault tree makes it effective for presentations and can be easily understood in a short period of time. This is a great improvement over forcing a person to go through pages of documentation to find the hazards. This type of analysis is important when a specific hazard probability is desired. The Army's requirement for safe and arm devices to have a failure rate of less than one in a million requires a quantitative hazard analysis.
Download or read book Reliability Safety and Hazard Assessment for Risk Based Technologies written by Prabhakar V. Varde and published by Springer Nature. This book was released on 2019-08-30 with total page 1015 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents selected papers from the International Conference on Reliability, Safety, and Hazard. It presents the latest developments in reliability engineering and probabilistic safety assessment, and brings together contributions from a diverse international community and covers all aspects of safety, reliability, and hazard assessment across a host of interdisciplinary applications. This book will be of interest to researchers in both academia and the industry.
Download or read book Probabilistic Analysis of Fault Trees Using Pivotal Decomposition written by William T. III. McCullers and published by . This book was released on 1985 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis an algorithm is presented for computing the exact failure probability for binary systems represented as fault trees. This algorithm does not rely on cut sets. Instead, it applies recursive pivotal decomposition together with probabilistic structural reductions and modularization directly to the fault tree. A further capability of the algorithm is the sequential printing of equations to form a function for a specific fault tree which computes system failure probability given the basic event probabilities. Additional keywords: Numerical analysis; Computer programs; Reliability; Systems analysis. (Author).
Download or read book Nuclear Regulatory Commission Issuances written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1982 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Fault Tree Method written by Winfrid G. Schneeweiss and published by Lilole-Verlag. This book was released on 1999-01-01 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fault Tree Analysis Primer written by Clifton A.. Ericson and published by . This book was released on 2011-12-15 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most valuable root-cause analysis tools in the system safety toolbox is fault tree analysis (FTA). A fault tree (FT) is a graphical diagram that uses logic gates to model the various combinations of failures, faults, errors and normal events involved in causing a specified undesired event to occur. The graphical model can be translated into a mathematical model in order to compute failure probabilities and system importance measures. A FT can model all aspects of a system, including hardware, software, human actions and the environment. FTs are employed to evaluate large complex and dynamic systems, in order to understand and prevent potential safety and reliability problems. Using the rigorous and structured methodology of FT construction allows the systems analyst to model the unique combinations of fault events that can cause an UE to occur. This book provides an overview of the FTA process; it describes the symbols, terms, construction methodology and mathematics of FTA.
