• 한국가스학회지
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• 제18권1호
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• pp.52-60
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• 2014

본 연구에서는 석유화학공정에서 잠재위험요소를 확인하고, 사고 결과분석을 통해 안전대책 수립 등의 위험관리 방안을 제시하고자 하였다. 이를 위해 프로필렌 회수공정(PRP)에서 현실적인 상황을 고려한 누출 시나리오를 선정하고, PHAST RISK(ver. 6.7) 프로그램을 사용하여 화재 및 폭발 사고의 피해범위를 산출하고, 피해영향을 해석하였다. 그 결과, 6개의 PRP 공정지역 중에서 디프로파나이저 지역, 디에타나이저 지역 및 히트펌프 지역에서는 화재 및 폭발 사고의 피해범위가 매우 크게 나타났다. 따라서 제트화재가 발생하는 공정지역에서는 200 m의 반경 내에서 사람이 상주할 수 있는 건물을 설치하지 않는 것이 바람직하고, 재고량과 압력이 큰 공정지역에서는 사고위험을 사전에 예방해야 하고, 사고 발생 시에는 신속한 대처방안 수립이 요구되었다.

• 한국안전학회지
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• 제31권2호
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• pp.26-32
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• 2016

In previous studies on LPG siting in Korea, the scope have not included the probability of the secondary events of adjacent LPG tanks or structures from an explosion source. Therefore, it is essential to first identify the phenomenon which can be caused by BLEVE and then, properly assess their effects to each target including secondary event. In this study, we calculated the effects from a potential BLEVE of 15 ton LPG tank causing damages of storage tanks (LPG), structures and human using Phast ver. 6.7 and then suggested three risk zones (Zone I, II, III) assuming the consequences such as overpressure, heat radiation and missile effect by fragments. Zone I and II are divided at the line of 50% occurrence of the secondary event. Zone II and III are divided by Individual Risk(IR). The zone approach in this study can be used for more effective and safer Land Use Planning (LUP) for the future.

• 한국안전학회지
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• 제31권3호
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• pp.156-161
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• 2016

An accident of an ammonia tank pipeline at a storage plant resulted in one death and three injuries in 2014. Many accidents including toxic gas releases and explosions occur in the freezing and refrigerating systems using ammonia. Especially, the consequence can be substantial due to that the large amount of ammonia is usually being used in the refrigeration systems. In this study, offsite consequence analysis has been investigated when ammonia leaks outdoors from large storages. Both flammable and toxic effects are under consideration to calculate the affected area using simulation programs for consequence analysis. ERPG-2 concentration (150 ppm) has been selected to calculate the evacuation distance out of various release scenarios for their dispersions in day or night. For offsite residential, the impact area by flammability is much smaller than that by toxicity. The methodology consists of two steps as followings; 1. Calculation for discharge rates of accidental release scenarios. 2. Dispersion simulation using the discharge rate for different conditions. This proactive prediction for accidental releases of ammonia would help emergency teams act as quick as they can.