Consequence Analysis of Gas Condensate Leakage in a Gas Refinery to Develop an Emergency Response Plan

Abstract

Background and Objective: One of the main steps to increase the level of safety and plan for reactions in the active or developing units is to assess the risks, such as releasing chemicals in the environment. The present study aimed to model the leakage consequences from gas condensate reservoirs for developing an emergency response plan. Materials and Methods: In order to investigate gas condensate distribution from reservoirs and related consequences in a gas refinery, PHAST software was used in this study. Using process data, landing maps, and meteorological information, the modeling was performed for four scenarios, including a jet fire, pool fire, flash fire, and vapor cloud explosion. In each scenario, the dimensions of the incident and extent of the damage were investigated, and the obtained results were utilized in identifying hazardous areas in the refinery, proper locating of safe areas, and improving routes used in emergencies. Results: In the 650 reservoirs, which are the most dangerous unit equipment, the four scenarios can lead to deadly consequences. In this regard, the incident of vapor cloud explosion and after that pool fire had the most consequences. Accordingly, up to 490 m, the reservoirs, including the control center and some routes, will be affected by possible incidents. Conclusion: According to the regions wind rose and modeling, some changes should be made in the emergency plan, including the fact that the two access routes should be situated more distant from the reservoirs and they should not be placed in the direction of the wind. In addition, two muster points should be located more distant from the reservoirs, and the control center should be fortified against fire and explosion.

Keywords

• consequence analysis
• emergency response
• gas condensate
• phast software