Consequence Evaluation of Toxic Chemical Releases by ALOHA

Abstract

Abstract Incidence of chemical leakage presents a severe threat to the safety of residents in close proximity, air quality and occupational safety. And as such, the prevention and simulation of chemical leakage has become one of the most important topics in the fields of environmental protection and process safety. In this study, the areal location of hazardous atmospheres (ALOHA) models have been chosen to simulate the release of liquid and gaseous toxic substances of three unnamed plants at a chemical complex. The simulation involves the release of chlorine, epichlorohydrin, and phosgene (these three toxic substances have been chosen for their significantly larger quantities and higher threat to safety) in their storage tanks to analyze the results from the scenario for further analyses and comparisons. The results are then presented in accordance to the emergency response planning guidelines (ERPG) and corresponding immediately dangerous to life or health (IDLH) values. We discovered the spread affection scope of plant C had the higher leaking of phosgene, the next was the plant A for leaking of chlorine, and the final was the plant B for leaking of epichlorohydrin. The results were then used in the deductions of relevant analyses of consequences and risk assessments, which would be made available to the sector in the hopes of minimizing the potential impact from such incidents in the future.