Avaliação de risco do gás cloro na estação de tratamento de água de Caçapava do Sul - RS

Abstract

Industries that use dangerous chemical substances in their processes risk suffering an accident in their facilities. Thus, having a chance of, due to the accident, cause damage to the envirornment and to the population around the area. Then, measures of identification, analysis, prevention, and mitigation of risks are nescessary. The risk analysis studies encompass all of these processes. In this paper, the CETEBS (Envirornmental Company of São Paulo) normatives were used in it’s technical norm, P4. 261 – Risk of accident of technological origin, to make a risk analysis study of the chlorine at the water treatment plant in the city of Caçapava do Sul - RS. The paper seeks to define the impact area due to the leaking of chlorine gas cylinders. For that, the software ALOHA was used to calculate the spacial distribution of the chlorine gas concentration in the atmosphere by the distance from the leaking point. Through the PROBIT equation the the concentrations with death risk of 1%, 50% and 99% were defined, where risk was verified for the community around the company.