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Shah P.,Reliance Industries Ltd DMD | Patel C.J.,Reliance Industries Ltd DMD | Ghosh P.K.,Center for Excellence
AIChE Annual Meeting, Conference Proceedings | Year: 2010

The paper describes the consequence modeling of chlorine release from a chlor alkali plant as a part of process hazard analysis. The objective was to carry out Quantitative Risk Assessment (QRA) study of the chlorine system of the chlor alkali plant and build up in-house capability to carry out such studies. QRA covers the following stages: Hazard Identification, Consequence Analysis, Frequency Analysis, Risk Analysis and Risk Management. QRA provides valuable insights into the features of the Industrial plant, highlighting those aspects where failure may result in harm to operators, members of the public, the environment and or the asset itself. Hazard identification was done in two phases by Safety review of chlorine storage system and using Chemical Exposure Indices (CEI) method. Based on the safety review and CEI rating, scenarios were selected for modeling and consequence analysis. The results were summarized and scenarios were classified on basis of Onsite and Offsite Impact. A consequence modeling of losses of containment scenarios of chlorine bullet using PHAST software is explained in detail in the paper along with the risk management recommendations. Competency development initiatives such as this were helpful in understanding of process hazards by the plant operating staff and helped in implementation of mitigating measures. Thus a robust safety management culture can be instituted.

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