• 대한안전경영과학회지
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• 제16권3호
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• pp.63-70
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• 2014

There has been an increase in fire/explosion accidents caused by chemical substances used in new small/medium sized construction, reconstruction, or extension sites. There is vast room for improvement, especially in safety training, safety inspection, and selection of countermeasures because training, technicality, and management systems regarding fire/explosion risks in small/medium sized construction sites are very immature in most cases. The purpose of this study is to propose a differentiated technical, educational, and management application plan for preventative management of fire/explosion accidents caused by chemical substances used in small/medium sized construction sites.

• 한국화재소방학회논문지
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• 제18권2호
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• pp.20-26
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• 2004

본 논문은 가스폭발로부터 화채로의 전이현상 및 전이 방지 연구를 위해 가로 세로 높이가 각각 $100 cm {\times} 60 cm {\times} 45 cm$인 폭발용기를 사용하여 폭발 후 화재로의 전이현상을 고속 비디오로 가시화하고 가시화된 영상을 분석하여 그 기구들을 확인하였다. 고체 가연물로는 신문용지를 가로 세로가 $30cm {\times} 20cm$크기로 절단하여 사용하였고 LPG-공기 혼합가스는 10㎸ 전기 스파크를 사용하여 점화시켰다. 실험 변수로는 혼합가스의 농도, 개구부의 크기 및 가연물의 위치 등이었으며, 파열면의 크기는 $10cm {\times} 9cm, 13cm {\times} 10cm, 27cm {\times} 20cm, 40cm {\times} 27cm$로 하였고 가연물의 설치 위치는 4종류로 하였다. 폭발 후 전이 방지 기구의 고찰은 가스 소화약제인 이산화탄소를 이용하여 실험하였다. 실험 결과 가스폭발로부터 화재로의 전이 현상은 혼합가스의 농도와 고온의 화염 및 연소가스에 노출되는 시간에 많은 영향을 받으며 폭발 후 분위기의 냉각이나 불활성화를 통해 화재로의 전이를 방지 할 수 있음을 알 수 있었다.

• 방재기술
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• 통권19호
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• pp.29-35
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• 1995

This decument, translated and rearranged deseribes the features of dust explosion and the factors which have an important effect upon the hazard of dust explosion on the purpose of prevention the disaster caused by dust explosion. The dust explosion exist close to our common life as latently, but it seems to be overlooking in com-mon, regretably Tr need to be evoked.

• International Journal of Safety
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• 제11권1호
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• pp.15-18
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• 2012

Because of development of printing technology, toner cartridge particle becomes smaller and more dangerous. And sometimes we had incidents with dust explosion of toner cartridge particle at recycling facilities in Japan. Therefore we studied on hazard of toner particle relating with dust explosion. We found that toner particle is so dangerous compared with most organic solids, even though it does not belong to hazardous materials in the UN regulation and the Japanese Fire Service Law.

• 한국안전학회지
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• 제39권2호
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• pp.9-21
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• 2024

Static-electricity-induced fires and explosions persistently occur every year, averaging approximately 80 and 20 cases annually according to fire statistics provided by the National Fire Agency and industrial accident statistics provided by the Ministry of Employment and Labor, respectively. Despite the relatively low probabilities of these accidents, their potential risks are high. Consequently, effective risk assessment methodologies and accident investigation strategies are essential for efficiently managing static-electricity hazards in fire- and explosion-prone areas. Accordingly, this study aimed to identify the causal variables essential for accident investigations, thereby facilitating risk assessments and the implementation of effective recurrence prevention measures to mitigate static-electricity hazards in fire-and explosion-prone regions. To this end, industrial accident statistics recorded over the past decade (2012 to 2021) by the Ministry of Employment and Labor were analyzed to identify major fire and explosion incidents and related industrial accidents wherein static electricity was identified as a potential ignition source. Subsequently, relevant investigation reports (63 cases) were thoroughly analyzed. Based on the results of this analysis, existing electrostatic fire and explosion risk assessment techniques were refined and augmented. Moreover, factors essential for investigating electrostatic fire and explosion disasters were delineated, and the primary causal variables necessary for effective risk assessments and scientific investigations were derived.

• 전기학회논문지
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• 제66권12호
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• pp.1836-1843
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• 2017

In this paper, we investigated fire cases those are believed to be caused by explosion of a electrolytic motor start capacitor. Using two types of commercially available electrolytic motor start capacitors, capacitor current and the possibility of capacitor explosion were tested. And the ignition possibility of the internal material leaked from a capacitor was also tested. In addition, experiments were conducted to see if the fire could spread when a capacitor was exposed to an external flame. From our test we observed that the current of the electrolytic motor start capacitor rose continuously to a certain level by product, if the capacitor was continuously energized with working voltage, and then the capacitor was exploded. The gas and liquid leaked from the capacitor by the explosion could ignite by an electric arc and an external flame. The capacitor current at explosion was different product by product, but each product had a certain current level at explosion. And the increase rate of the capacitor current until explosion was 24% and 31% for the products used in the experiment. We proposed the capacitor explosion prevention method that cuts off power when the capacitor current rises to a certain threshold level. The proposed method can be used if the current of the applied electrolytic motor start capacitor rises continuously and then the capacitor is exploded at a certain current level when the capacitor is energized continuously.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2001년도 추계학술대회 논문집
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• pp.211-215
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• 2001

• 한국방재학회:학술대회논문집
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• 한국방재학회 2007년도 정기총회 및 학술발표대회
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• pp.405-409
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• 2007

This paper focused on the way of prevention of disaster in the accident of explosion when the fire broke out in the boiler room where installed the basement of the building, and showed the effective ways for sustaining people and property safely in the view of problems and improvement of the law and safety awareness of people.

• 대한안전경영과학회지
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• 제26권1호
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• pp.99-106
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• 2024

In the event of an emergency such as facility shutdown during process operation, the by-product gas must be urgently discharged to the vent stack to prevent leakage, fire, and explosion. At this time, the explosion drop value of the released by-product gas is calculated using ISO 10156 formula, which is 27.7 vol%. Therefore, it does not correspond to flammable gas because it is less than 13% of the explosion drop value, which is the standard for flammable gas defined by the Occupational Safety and Health Act, and since the explosion drop value is high, it can be seen that the risk of fire explosion is low even if it is discharged urgently with the vent stock. As a result of calculating the range of explosion hazard sites for hydrogen gas discharged to the Bent Stack according to KS C IEC 60079-10-1, 23 meters were calculated. Since hydrogen is lighter than air, electromechanical devices should not be installed within 23 meters of the upper portion of the Bent Stack, and if it is not possible, an explosion-proof electromechanical device suitable for type 1 of dangerous place should be installed. In addition, the height of the stack should be at least 5 meters so that the diffusion of by-product gas is facilitated in case of emergency discharge, and it should be installed so that there are no obstacles around it.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2005년도 춘계학술논문발표회 논문집
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• pp.56-62
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• 2005