Integration of risk matrix and event tree analysis: a natural stone plant case

Abstract

Machining has considerably increased with evolving technology and increasing demand in natural stone production facilities. Different types of accidents may occur in natural stone facilities during movement, dimensioning, cutting of blocks and surface processing. These accidents may be due to physical, chemical, ergonomic and mechanical conditions. Therefore, possible work accidents and occupational diseases should be investigated. In this study, an L-matrix analysis is conducted to analyze hazards and forecast risks in natural stone facilities. According to the L-matrix results, three major initiating events are identified. For each of these initiating events, event tree analysis is used to calculate risk scores. These initiating events are hoist rope fatigue and breaking, diamond wire fatigue and breaking, and electrical leakage due to old systems. These events and their results are classified according to the probabilities using event tree analysis.

Application of FTA Analysis for Calculation of the Probability of the Failure of the Pressure Leaching Process

“…It is practically difficult to achieve it without intervention in the technology or autoclave construction. Outputs from FTA but ETA (event tree analysis) analysis are important inputs to the risk assessment process by other methods, such as L-matrix analysis, hazard and operability analysis (HAZOP), fault tree analysis (FTA), bow-tie analysis and fault mode effect analysis [37,38], or Failure Mode and Effects Analysis (FMEA). The legislation of the Slovak Republic, based on the directives of the European Union, Council Directive 89/391/EEC on the introduction of measures to encourage improvements in the safety and health of workers at work and Council Directive 89/392/EEC machinery directive, shows organizations to manage their risks.…”

A Novel Method for Risk Assessment of Cable Fires in Utility Tunnel

“…O: T ⟶ P denotes the output function, a mapping from transitions to places: Mathematical Problems in Engineering e analysis is extensively used in risk and safety analyses in several different industries. Five basic steps are used to develop an event tree as follows [24,25]: identifying the initiating event, determining countermeasures, building the event tree, evaluation of the tree, and risk classification.…”

“…e probability of a particular state is equal to the probability of the path leading to the state. e probability is determined as a product of the probabilities of the branches that comprise of the path and probability or frequency of the initiating event [25], as shown in Figure 3.…”

“…In the study, the observed value of each evaluation factor P i is assumed to suffer from a fluctuation of − 30%, − 20%, − 10%, +10%, +20%, and +30% of its initial value. As shown in equation (25), the degree of influence of the change in P i on the top event A as shown in Figure 7 is as follows:…”

Research on Detection and Safety Analysis of Unfavorable Geological Bodies Based on OCTEM-PHA

“…The JHA method is an effective method for risk assessment and management of operational processes by identifying hazards and reducing or eliminating risks at industrial sites through monitoring or improving operational procedures [37]. The ETA method lists all possible events of the system on a tree diagram and analyzes the cause, development, and outcome of the accident by logical reasoning from the starting state of the event and is suitable for the quantitative assessment of significant hazards [38]. The FTA method, which starts with the outcome event and analyzes the direct and potential causes of the accident in an anachronic manner, is an essential tool for probabilistic risk assessment and is widely used to determine the reliability of systems [39].…”