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Mostafa Pouyakian , Rozita Farhadi , Mohammad Javad Jafari , Fatemeh Zarei ,
Volume 2, Issue 3 (6-2017)

Background: Nowadays, the reduction of incidents, their effects and their consequences have become one of the priorities of organizations. Despite all the efforts made in various sectors to reduce events, every year, there are many events that threaten industrial societies. In order to mitigate the effects of these incidents, prediction and planning are critical to dealing with them. Therefore, the purpose of this study was to evaluate the risk of explosion of 1-butane reservoir in a polymer complex based on an analysis of the outcome using the PHAST software.
Methods: This study was conducted in one of the Kermanshah petrochemical complexes in 2016. Necessary geographic information and other basic information were collected. 16 probable scenarios were selected and consequences modeling was done by PHAST software.
Results: The modeling results showed that full rupture scenarios and leakage scenarios from the 150 mm hole are the most dangerous scenarios.
Conclusion: The results of modeling showed that the larger the leakage size, the associated consequences would be more dangerous and consequently more losses. Due to the capabilities of studied company and the readiness level of the company, it has the ability to respond to the first scenario to some extent.


Mehrdad Inanloo, Gholamreza Sadeghi,
Volume 5, Issue 4 (12-2019)

Background: Chemical industries and facilities pose the risk of potential hazards in case of accidents, which lead to injuries and financial losses due to the spread of materials in the surroundings of the accident. These materials often have harmful properties (e.g., toxicity or flammability), and their release could cause secondary accidents (e.g., fire, poisoning, and explosion). The present study aimed to assess the effects of toxic sulfur dioxide (SO2) in a suffocation unit.
Methods: A possible scenario of SO2 emission was selected using the matrix presented by the researchers. Afterwards, the hazard and operability study method was used to analyze the conditions. The modeling and evaluation of the outcomes of the selected scenario for SO2 gas emission from the gas pipeline were carried out using the PHAST7.11 software.
Results: The worst scenario was observed in the employees within the approximate distance of 10 meters and height of two meters from the gas leakage (100 mm leakage diameter) and gas diffusion angled from horizontal impingement.
Conclusion: About 1.84 seconds after the leakage of toxic SO2 (distance: 10 meters, height: 1.39 m), the concentration was approximately 39,339 ppm, which was the worst scenario in August, with the possible mortality risk of 49%.

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