OPTIMIZATION OF THE CALCULATION OF HAZARDOUS ZONESBOUNDARIES FOR CLASSIFICATION OF HAZARDOUS AREA USING RISK BASED APPROACH

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ZOHDIRAD H.; EBADI T.; GIVEHCHI S.

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Journal: Journal of Health and Safety at Work Year:2016 | Volume:6 | Issue:1 Page(s): 13-22

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Title

OPTIMIZATION OF THE CALCULATION OF HAZARDOUS ZONESBOUNDARIES FOR CLASSIFICATION OF HAZARDOUS AREA USING RISK BASED APPROACH

Author(s)

ZOHDIRAD H. | EBADI T. | GIVEHCHI S. | Issue Writer Certificate

Keywords

RISKQ2

HAZARDOUS AREA CLASSIFICATIONQ2

FLAMMABLE GAS CLOUDQ2

IGNITION PROBABILITYQ2

Abstract

Introduction: Leakage from process equipment and the entrance of flammable fluids to surrounding atmosphere may cause FLAMMABLE GAS CLOUD. The coincidence of FLAMMABLE GAS CLOUD with ignition source could make flash fire or vapor cloud explosion that cause injury and fatality. The concept of reduction of confluence of FLAMMABLE GAS CLOUD and potential sources of ignition is known as hazardous are a classification. Several standards have provided methods regarding HAZARDOUS AREA CLASSIFICATION; however, of the disadvantages of them are lack of an accurate determination of hazardous areas due to potentialleakage sources which is because of low flexibility in process condition variation and equipment layout and also not considering effect of weather conditions and cumulative effects of release sources.Material and Method: In this paper, RISK-based HAZARDOUS AREA CLASSIFICATION is optimized using parameters such as the number of influencing release sources and weather condition probabilities. In this method, the determining factor of hazardous area boundary is the probability of acceptable ignition for every specificlocation. This probability is calculated using quantitative RISK assessment with PHAST RISK software version 6.7 on the gas boosting unit of a gas refinery as a case study.Result: The results of this method showed the full dependency of hazardous area boundary to cumulative effects of potential sources of release and the prevailing wind direction and it also demonstrated that the suggested optimized method can consider wind direction probabilities and cumulative effects of potential sources of release in RISK-based HAZARDOUS AREA CLASSIFICATION calculation.Conclusion: Comparing the results of this method with the usual method determines that this method has some advantages such as considering all sources of release and cumulative sources of release and considering wind direction probabilities in determining boundary of zone 2 which makes the HAZARDOUS AREA CLASSIFICATION very precise and flexible.

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APA: Copy

ZOHDIRAD, H., EBADI, T., & GIVEHCHI, S.. (2016). OPTIMIZATION OF THE CALCULATION OF HAZARDOUS ZONESBOUNDARIES FOR CLASSIFICATION OF HAZARDOUS AREA USING RISK BASED APPROACH. JOURNAL OF HEALTH AND SAFETY AT WORK, 6(1), 13-22. SID. https://sid.ir/paper/235673/en

Vancouver: Copy

ZOHDIRAD H., EBADI T., GIVEHCHI S.. OPTIMIZATION OF THE CALCULATION OF HAZARDOUS ZONESBOUNDARIES FOR CLASSIFICATION OF HAZARDOUS AREA USING RISK BASED APPROACH. JOURNAL OF HEALTH AND SAFETY AT WORK[Internet]. 2016;6(1):13-22. Available from: https://sid.ir/paper/235673/en

IEEE: Copy

H. ZOHDIRAD, T. EBADI, and S. GIVEHCHI, “OPTIMIZATION OF THE CALCULATION OF HAZARDOUS ZONESBOUNDARIES FOR CLASSIFICATION OF HAZARDOUS AREA USING RISK BASED APPROACH,” JOURNAL OF HEALTH AND SAFETY AT WORK, vol. 6, no. 1, pp. 13–22, 2016, [Online]. Available: https://sid.ir/paper/235673/en

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