• Title/Summary/Keyword: Gas Explosion Accident

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A Study on the Quantitative Analysis and Estimation for Surround Building caused by Vapor Cloud Explosion(VCE) in LPG Filling Station (LPG충전소에서 증기운폭발이 주변건물에 미치는 영향의 정량적 해석 및 평가에 관한 연구)

  • Leem, Sa-Hwan;Huh, Yong-Jeong
    • Journal of the Korean Society of Safety
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    • v.25 no.1
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    • pp.44-49
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    • 2010
  • This paper is estimation of structure damage caused by Explosion in LPG(Liquefied Petroleum Gas) filling station. As we estimate the influence of damage which occur at gas storage tank in filling station. We can utilize the elementary data of safety distance. In this study, the influence of over-pressure caused by VCE(Vapor Cloud Explosion) in filling station was calculated by using the Hopkinson's scaling law and the accident damage was estimated by applying the influence on the adjacent structure into the probit model. As a result of the damage estimation conducted by using the probit model, both the damage possibility of explosion overpressure to structures of max 265 meters away and to glass bursting of 1150 meters away was nearly zero in open space explosion.

Development of Gas Detector Location Index Technique to Prevent Explosion Accidents of Offshore Plant (해양플랜트 폭발사고 방지를 위한 가스감지기 위치 선정 방법 연구)

  • Sohn, Jung Min;Paik, Jeom Kee;Kim, Sang Jin
    • Journal of the Society of Naval Architects of Korea
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    • v.54 no.1
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    • pp.63-70
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    • 2017
  • Release of hazardous and flammable gas is a significant contributor to risk. The ignition of flammable gas clouds can lead to explosion accidents in the offshore installations. A gas detector, which is one of active protect systems, brings the module into a safe state through emergency shut down processes and reduces the damage by eliminating the dangerous releases. It is critical to understand the gas release, the wind field, and the complex geometry of installations to determine gas detector placement. In this paper, the Gas detector Location Index (GLI) which is a novel index for optimal detector location determination to efficiently prevent explosion accident using probabilistic approach.

A study on the characteristics of gas explosion with vent area (밀폐공간에서 파열면에 따른 가스폭발특성에 관한 연구)

  • Kim Sang Sub;Chae Jae Ou;Jo Young Do;Jang Gi Hyun
    • Journal of the Korean Institute of Gas
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    • v.7 no.4 s.21
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    • pp.53-60
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    • 2003
  • Accident occurred by gas explosion in house or building causes damage on lives and properties. To avoid secondary damage, this study drew area ratio of vent area with the experiment for pressure variation with vent area versus building volume by selection of model for different size and shapes of vent area generated by explosion. In addition, Appropriate model was chosen to predict the damage by minimum pressure with the experiment of opening are shapes. This model can prevent secondary damage with the selected vent area and shape to guarantee building safety.

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Study on Fire.Explosion Accidents Prediction Model Development of LPG Vaporizer (LPG 기화기의 화재.폭발사고 예측모델개발에 관한 연구)

  • Ko, Jae-Sun
    • Journal of the Korean Institute of Gas
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    • v.14 no.1
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    • pp.28-36
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    • 2010
  • We have garnered 3,593 data of gas accidents reported for 12 years from 1995, and then analyzed the LPG vaporizer accidents according to their types and causes based on the classified database. According to the results the gas rupture has been the most common accident followed by the release, explosion and then fire accidents, the most frequent accident-occurring sub-cause is LPG check floater faults. In addition, we have applied the Poisson Probability Functions to predict the most-likely probabilities of fire, explosion, release and rupture with the LPG vaporizer in the upcoming 5 years. In compliance with Poisson Probability Functions results, in the item which occurs below 3 "LPG-Vaporizer-Fire", in the item which occurs below 5 "LPG-Vaporizer-Products Faults-Check Floater" and the item which occurs below 10 appeared with "LPG-Vaporizer-Products Faults". From this research we have assured the successive database updating will highly improve the anticipating probability accuracy and thus it will play a key role as a significant safety- securing guideline against the gas disasters.

Analysis of Hydrogen Accident in Korea (국내 수소사고사례 분석)

  • Jo, Young-Do;Tak, Song-Su;Choi, Kyoung-Suhk;Lee, Jong Rark;Park, Kyo-Shik
    • Transactions of the Korean hydrogen and new energy society
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    • v.15 no.1
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    • pp.82-87
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    • 2004
  • Hydrogen is considered to be the most important future energy carrier in many applications reducing greenhouse gas emissions significantly. To be applicable as energy carrier the safety issues associated with hydrogen applications needs to be investigated and fully understood. In order to analyze the risks associated with hydrogen applications, accidents associated with hydrogen in Korea from 1963 to 2002 have been analysed in this work. From analysis of accidents, we propose the necessity of research on hydrogen releases, dispersion in air, and explosion due to high hazardous of hydrogen.

A Study on the Quantitative Analysis for Explosion of LPG Storage Tank (LPG 저장탱크의 폭발에 대한 정량적 영향평가에 관한 연구)

  • Leem, Sa Hwan;Huh, Yong Jeong
    • Journal of the Korean Institute of Gas
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    • v.17 no.3
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    • pp.1-7
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    • 2013
  • The influence of the over-pressure caused by Explosion in gas station was calculated by using the Hopkinson's scaling law and injury effect by accident to buildings and human bodies was estimated by applying the probit model. As a result, the injury estimation was conducted by using the probit model for leakage 10% of 20ton storage tank. The separate distances from LPG station for building(damage) and human(lung hemorrhage to death) are 260 and 30 meters, respectively.

Measures to Prevent Recurrence through the Analysis of an Explosion Case at Ammonia Refrigeration Facilities (암모니아 냉동시설의 폭발사례 분석을 통한 재발방지대책)

  • Ryu, Young-Jo;Lee, Min-Kyung;Lee, Su-Kyung
    • Journal of the Korean Institute of Gas
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    • v.20 no.3
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    • pp.38-45
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    • 2016
  • In this study, we found that the release and dispersion of ammonia can create hazardous atmospheres using FLACS software. In General, ventilation or gas detector installations are recommended as preventive measures to control explosion incidents. However, the ventilation installations cannot be applicable to the refrigeration facility that uses ammonia as refrigerating medium, because the freezing room should be sealed. From the accident investigation of the explosion case, we suggested that all electronic devices were needed to be switched by explosion proof devices, and communication facility was also needed to be installed to announce to all employees within a building in case alert condition like ammonia releases occurred.

Constructing a Database Structure for the Domestic LP Gas and Natural Gas Accidents and its Analysis (국내 LP 및 천연가스사고 Database 구축 및 분석에 관한 연구)

  • Ko, Jae-Sun;Park, Sun-Young;Kim, Hyo
    • Journal of the Korean Institute of Gas
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    • v.12 no.3
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    • pp.56-63
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    • 2008
  • We have garnered 3,593 data of gas [Natural Gas (NG) and Liquefied Petroleum Gas (LPG)] accidents reported for 16 years from 1991, and then analyzed the accidents according to their types and causes based on the classified database. According to the results the gas leak has been the most common accident followed by the explosion and then fire accidents. The most frequent accident-occurring locations for fire, explosion and leak are recognized around the valve, hose and pipeline, respectively. In addition, we have applied the Poisson analysis to predict the most-likely probabilities of fire, explosion and release in the upcoming 5 years. From this research we have assured the successive database updating will highly improve the anticipating-probability accuracy and thus it will play a key role as a significant safety-securing guideline against the gas disasters.

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A Study on the Risk Assessment and Improvement Methods Based on Hydrogen Explosion Accidents of a Power Plant and Water Electrolysis System (발전소 및 수전해 시스템의 수소 폭발 사고 사례 기반 위험성 평가 및 개선 방안 연구)

  • MIN JAE JEON;DAE JIN JANG;MIN CHUL LEE
    • Transactions of the Korean hydrogen and new energy society
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    • v.35 no.1
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    • pp.66-74
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    • 2024
  • This study addresses the escalating issue of worldwide hydrogen gas accidents, which has seen a significant increase in occurrences. To comprehensively evaluate the risks associated with hydrogen, a two approach was employed in this study. Firstly, a qualitative risk assessment was conducted using the bow-tie method. Secondly, a quantitative consequence analysis was carried out utilizing the areal locations of hazardous atmospheres (ALOHA) model. The study applied this method to two incidents, the hydrogen explosion accident occurred at the Muskingum River power plant in Ohio, USA, 2007 and the hydrogen storage tank explosion accident occurred at the K Technopark water electrolysis system in Korea, 2019. The results of the risk assessments revealed critical issues such as deterioration of gas pipe, human errors in incident response and the omission of important gas cleaning facility. By analyzing the cause of accidents and assessing risks quantitatively, the effective accident response plans are proposed and the effectiveness is evaluated by comparing the effective distance obtained by ALOHA simulation. Notably, the implementation of these measures led to a significant 54.5% reduction in the risk degree of potential explosions compared to the existing risk levels.

Experiment and Simulation of Diffusion of Gas Released from the Relief Valve of a Gas Cylinder for a Portable Gas Range (압력 방출밸브를 장착한 이동식 부탄연소기용 부탄캔의 분출가스 확산 실험 및 해석)

  • Kang, Seung-Kyu;Choi, Kyung-Suhk;Yoon, Joon-Yong
    • The KSFM Journal of Fluid Machinery
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    • v.12 no.1
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    • pp.16-21
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    • 2009
  • In the last five years, 91 accidents from portable gas ranges and non-refillable metallic gas cartridges have occurred. The gas cylinder installed with a relief valve was developed to prevent an explosive accident from the gas cartridge. In this study it was carried out to evaluate the safety of a gas cylinder mounted with a relief valve which can prevent an explosion. Under the real using condition and the extreme condition the gas cylinder is heated with an electric heater. Simultaneously, the operating pressure is checked and the suitability of releasing flux is evaluated. And the possibility of fire or explosion was tested when the gas was released from the relief valve at the real using condition. Using a numerical simulation method, the diffusion of butane gas released from a relief valve was visualized.