Consequence Modeling of Chlorine Release from Water Treatment Plant

Abstract

In the recent years, world has seen a wide range of major accidents with a number of fatalities, economic losses, and damage to the environment. These accidents can lead to serious danger to human health and the environment which can be occurred inside or outside the establishment. Consequence assessment is very important to predict and prevent deleterious effects of these events. Chlorine is a toxic material that is used in Water Treatment Plants as disinfectants. The aim of this study is to determine and identify the locations with high risk near the water treatment plant of Rasht, in the north of Iran. In this paper the modeling of chlorine release has been investigated for water treatment plant by using PHAST (Process Hazard Analysis Software Tool) software. According to the result of modeling the rupture of chlorine vessel in F stability class is the worst possible Release scenario because it has been affected more distance than other scenarios. The probability of fatality is %100 in each 3 stability class for the point located at 100 meter downwind. Thus the surrounding land of this plant is non-residential for this distance and the suitable recommendation should be considered to decrees risk of chlorine release.