Hazard Identification and Consequence Analysis of Possible Events in the Tank Farm and Flare Area of ILAM Gas Refinery by ETBA and PHAST Software
Products of Ilam Gas Refinery include natural gas, ethane, C3 +, C5 +, and sulfur. The site of this refinery is located in the west of Iran. In this study, Energy Trace and Barrier Analysis (ETBA) method s was used to examine the risks of the reservoir area and flares of the refinery. A total number of 70 risks were identified, among which, 8 risks were within the unacceptable range. The outcome of the identified risks for the selected scenarios included radiation-induced fire, pressure-induced explosion, and infusion of toxins. The Process Hazard Analysis Software Tool (PHAST) was used to model the probable events under the four scenarios, including sudden release of gases from the spherical reservoirs, leaks of gas condensates from the cylindrical reservoirs, leaks of Liquefied Petroleum Gas (LPG) from the loading arm, and turning off the flares. The results showed that in the first scenario, the dangers resulted from the fire and explosion of the spherical reservoirs will affect a wide surface area of the refinery. In the second scenario, during the leaks of gas condensate, the peripheral wall of the cylindrical reservoirs would be of utmost importance. In the event of the third scenario, the location of the loading area would not be appropriate. In the fourth scenario, since the height of the burners is high enough, , there would be no serious damage on the nearby facilities and individuals in case of releasing toxic and flammable gases. Reassessing the fire-extinguishing systems, constant monitoring of the lightning rods, and performing firefighting maneuvers are among the preventive measures recommended in this study.
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