Fault Tree Analysis of LPG refuelling station (original) (raw)
Related papers
IJERT-Fault Tree Analysis of LPG refuelling station
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/fault-tree-analysis-of-lpg-refuelling-station https://www.ijert.org/research/fault-tree-analysis-of-lpg-refuelling-station-IJERTV3IS051486.pdf Fault tree analysis (FTA) is a top-down approach for analysis of the reliability and safety of technical systems. It starts with a possible failure event, called a TOP event, and then determining the ways it can happen. The analysis proceeds by determining how the TOP event is caused by lower level failure events. The primitive or basic failure events that ultimately cause the TOP event are connected through logical AND-gates and OR-gates. As an example of the practical application of methods, the lpg release accident of a LPG refueling station is analyzed, the estimation of the significance of certain events is done that have a greater or less influence on its reliability, and it is considered to be able to eliminate causes of failure or to minimize the consequences of failure.)
IJERT-Overview of Fault Tree Analysis
International Journal of Engineering Research and Technology (IJERT), 2015
https://www.ijert.org/overview-of-fault-tree-analysis https://www.ijert.org/research/overview-of-fault-tree-analysis-IJERTV4IS030543.pdf To increase the reliability of the system the failure data analysis is required. Fault tree analysis is the basic method which focuses on failure modes of any system and the probabilities of occurrence/ probability risk analysis associated with it. FTA represents major fault or critical failures associated to the system and causes for the faults graphically. Here we get to know the probability of failure of the give basic event with the help of which we get the probability of failure of the top event. This paper gives an overview of fault tree analysis and its methodology with the implementation.
Fault Tree Analysis in the Reliability of Heavy Fuel Oil Supply
Transactions on Maritime Science, 2014
Marine systems are complex and through the analysis of their reliability it is necessary to observe the reliability of their subsystems and components. With regard to the fact that the reliability is functionally dependent on faults, for the purpose of this study special attention has been given to possible faults on the heavy fuel oil supply pump of a two-stroke marine diesel engine MAN B&W 5L90MC. A deductive approach to reliability analysis, i.e. fault tree analysis method (FTA), has been used. By the use of this method it is simpler to identify the system’s weak link and it is shown that the method gives the basis for the ship’s system reliability analysis. Based on FTA analysis this paper suggests system parameters that require continuous monitoring in order to achieve reliability. The results show the behavior of the components in case of faults and this approach can help to create a plan of action in order to enforce timely corrective and preventive action and, accordingly, i...
Fault tree and reliability analysis
1977
Originally presented as the first author's thesis, (Sc. D.)--in the M.I.T. Dept. of Nuclear Engineering, 1977Includes bibliographical references (p. 311-312
Journal of Occupational Health and Epidemiology, 2021
Article Info Background: Risk assessment is an important tool for reducing casualties and financial damage in the oil and gas industry. This research aimed to identify and evaluate process hazards in the petrochemical industry in 2016. Material and Methods: In this case study, a team was organized and briefed on the process. Besides, hazard identification was performed using the Hazard and Operability Study. Next, causes were analyzed using the Fault Tree Analysis and occurrence probability of top events. Finally, events and subevents were ranked. The minimum cut sets were determined using Boolean algebra. Results: A total of 77 events were identified. Accordingly, unacceptable, tolerable, and acceptable risk levels were 41, 31, and 5 events, respectively. Fire was the most unacceptable risk level, with the final events of "human errors in correct gasket installation on the flange surface" and "flange defects" having had the shares of 51.2 and 21.55%, respectively. Conclusion: The combination of the two HAZOP and FTA techniques is useful in process industries in which incomplete performance of the system and control systems is the most effective factor in the potential occurrence of fire. Human errors and flange defects are the two main factors in this event, so occupational safety and health must be improved in this system. Thus, due to complex interactions between humans, machines, materials, and the environment in systems, such as the petrochemical industry, which lead to uncertainties in safety results of the process, risk assessment is recommended to be performed periodically using different techniques.
Methodology for Computer-Aided Fault Tree Analysis
Process Safety and Environmental Protection, 2007
Fault tree analysis is a systematic, deductive and probabilistic risk assessment tool which elucidates the causal relations leading to a given undesired event. Quantitative fault tree (failure) analysis requires a fault tree and failure data of basic events. Development of a fault tree and subsequent analysis require a great deal of expertise, which may not be available all the time. Computer-aided fault tree analysis is an easy-to-use approach, which not only provides reliable results but also facilitates the validation and repeatability of the analysis. This enhances the overall results of the fault tree analysis and quantitative risk analysis.
On Fault - Tree Analysis: A Possibilistic Approach
Top event failure probabilities are normally calculated using the exact values of the components failure probabilities in case of fault - tree analysis. There are some systems where evaluation of failure probabilities of components are ver y difficult based on the past occurrences because of system environments change. Moreover, failure of component which has never failed before must often be considered. Therefore, a n approach based on possibility of failure i.e a fuzzy set defined in probab ility space h as been introduced & finally possibility of failure of top event based on fuzzy faul t - tree model is calculated considering the trapezoidal nature possibility of failure of components by developing a generalized computer program .
Journal of Loss Prevention in the Process Industries, 2015
A method is presented for analysis of reliability of complex engineering systems using information from fault tree analysis and uncertainty/imprecision of data. Fuzzy logic is a mathematical tool to model inaccuracy and uncertainty of the real world and human thinking. The method can address subjective, qualitative, and quantitative uncertainties involving risk analysis. Risk analysis with all the inherent uncertainties is a prime candidate for Fuzzy Logic application. Fuzzy logic combined with expert elicitation is employed in order to deal with vagueness of the data, to effectively generate basic event failure probabilities without reliance on quantitative historical failure data through qualitative data processing. The proposed model is able to quantify the fault tree of LPG refuelling facility in the absence or existence of data. This paper also illustrates the use of importance measures in sensitivity analysis. The result demonstrates that the approach is an apposite for the probabilistic reliability approach when quantitative historical failure data are unavailable. The research results can help professionals to decide whether and where to take preventive or corrective actions and help informed decision-making in the risk management process.
The fault tree stochastic analysis
IOP Conference Series: Materials Science and Engineering, 2020
This article presents a solution of the fault tree quantitative analysis with application of knowledge of probability distribution type into the failure and distribution parameters in case of non-renewed objects or objects being restored. It brings a look at fault tree solving based on statistical view using mathematical modeling. In this article present relations of FTA analysis for quantitative deterministic approach that is most commonly used.
Journal of Loss Prevention in the Process Industries
A method is presented for analysis of reliability of complex engineering systems using information from fault tree analysis and uncertainty/imprecision of data. Fuzzy logic is a mathematical tool to model inaccuracy and uncertainty of the real world and human thinking. The method can address subjective, qualitative, and quantitative uncertainties involving risk analysis. Risk analysis with all the inherent uncertainties is a prime candidate for Fuzzy Logic application. Fuzzy logic combined with expert elicitation is employed in order to deal with vagueness of the data, to effectively generate basic event failure probabilities without reliance on quantitative historical failure data through qualitative data processing.The proposed model is able to quantify the fault tree of LPG refuelling facility in the absence or existence of data. This paper also illustrates the use of importance measures in sensitivity analysis. The result demonstrates that the approach is an apposite for the pro...