risk assessment in catalytic reforming unit in one of the iran’s refinery by using ftamethod

human are always looking for means to improve their lives. the human desire for a better life caused he used his talents and abilities for invention of machine and tools, explore different material and new ways to work from ancient times until now and we are already seeing some of the progress. modern technology reduced risk of earlier, however it faced people with new risks. thus overtime they needed a system to oversee the work safety. at present we run it as a risk management in the organization under hse management and a subset of its activities in order to eliminate or reduce the risks. nowadays several techniques are used to analyze safety systems. today, due to the fact that our country is based on oil industry and its important role in the economy, so pay attention to hse issues in the oil, gas and petrochemical industries is very important. in this industries risk is high and all units in all organizations should identify all risks and are looking to reduce and if possible eliminate them. this study investigates the failure occurrence probability of a furnace in catalytic reforming unit in one of the iran’s refinery by using fault tree analysis (fta) method for 500 h operating interval.