Study On Risk Evaiuation System Of Indoor Gas Safety

With the continuous innovation and development of gas application technology,the demand and consumption of gas in China are gradually increasing,and various gas safety accidents also occur frequently.The overall safety of indoor gas systems has also become the focus of industry attention in recent years.Based on the current interactions among various risk factors in the indoor gas system and the impact on the safety of the system,this paper takes the indoor gas system risk factors as the research object,and establishes an indoor gas safety risk assessment system to divide risks.Grade,evaluate the safety of the system,establish a risk management and control program.According to the principle of risk identification,through the induction of the causes of indoor gas system safety accidents and the analysis of safety inspection data of gas companies in various places,it was determined that 14 research subjects identified 82 risk factors in the system.Analyze the relationship between risk factors,determine the two failure modes of system explosion and poisoning,establish a system failure security fault tree model with failure logic and perform qualitative analysis,calculate the structural importance of risk factors in the system,and divide the primary and secondary risk factors.66 key risk factors establish a risk factor database framework.Starting from the perspective of the system's full life cycle,it establishes the risk factor structure,operation,and risk level indicators to measure the impact of various risk factors on system security.The fault tree analysis method is used to calculate the structure index of each risk factor,that is,the structural importance probability.The Matlab program was established using the improved expert evaluation method and fuzzy mathematics theory to calculate the operational risk of risk factors and the probability of dangerous degree indicators.Analyze and calculate the result and draw the law of influence of various risk factors on system security.The principal component analysis method was used to analyze the correlation between the three evaluation indicator data of risk factors,and the weights of each indicator when used to measure the degree of impact of each risk factor on system security were 0.24,0.36,and 0.40.Comprehensive grading method was used to quantify the impact of each risk factor on the overall safety of the system.During the study,risk factors were divided into two categories.One group of 14 major risk items directly assigned the highest score,the other is the remaining 52 risk factors,according to the risk The data characteristics of the factor evaluation indexcalculation results are divided into 5 scoring levels by cluster analysis,and the final score of each risk factor is calculated by using the weighted index score method.The risk assessment system is established by summarizing the scores of the two types of risk factors.And divide 4 risk levels.In response to the weak links in the system,the company proposes measures for the management of gas companies and users,develops risk management measures from three aspects of rectification,time for correction,and rectification measures,and establishes a risk management and control program for indoor gas systems,from the design of prevention,operation evaluation,and rectification management systems.The entire life cycle of closed-loop management of indoor gas safety.Through the introduction of three examples to verify the feasibility of the results of this study.This article quantifies the impact of risk factors on system security through the establishment of clear indicators.Through the system scores,it can directly obtain the evaluation results of system safety degree.It has certain guidance and reference significance for improving the safety management level of enterprises in practical projects.