The Risk Assessment Research Of The Liquefied Natural Gas Station

LNG is an important part of the natural gas trade in international trade, in the past 10 years, the LNG production had a rapid growth. Due to vaporization of LNG after the natural gas obtained is about the same volume of 625 times that of LNG, the gas supply can offer high efficiency by LNG, a lot of gas companies favor it, and establishment of a number of LNG gas stations. But LNG gas stations has potential leakage, fire and explosion hazards, the probability of occurrence of these events is relatively low, but if that were to happen ,there have a disastrous Consequences, at the same time, as using of LNG popularity , the accident rate risks have increased, so this article carry out a risk assessment of LNG gas stations.In this article, based on the properties of LNG, a summary of the LNG itself risk and the LNG gas stations'potential risk accidents, and at the same time from LNG itself risk, LNG storage tanks and pipelines hazardous facilities, manpower and safety management Risk factors and environmental factors, we analysis of the LNG gas station possible risk factors, through access to documents related LNG gas station ,we established the LNG supply site of the fault tree, and analysis the fault tree of various type of factors, obtaining their respective minimal cut sets or the minimal path sets, an made a number of measures to prevent accidents On the basis of the fault tree, we also established LNG gas stations fuzzy comprehensive evaluation system and all types of accidents were also had a fuzzy evaluation, and arrive at the results fuzzy comprehensive evaluation of the gas station. A summary of LNG Gas stations all types of hazards model: leakage of LNG and natural gas, the model of natural gas spread ,fire thermal radiation model an the explosion wave model We summarized a risk model of the consequences for each of accidents and the Economic evaluation for the entire LNG Station in accident. Combination of fault tree analysis, we calculated the probability of the various types of accidents, and gave some of the LNG gas station accident prevention measures.