• Journal of Korean Tunnelling and Underground Space Association
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• v.5 no.1
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• pp.55-70
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• 2003

Ammunition magazine, which is installed on the ground, has difficulty in protecting from the external attack, and accidental explosion should cause great damage to the life and property. For these reasons, it is needed to develop underground magazine that it has the advantages of safety, security and maintenance. This paper introduce the design case for blasting facilities, which should resist blasting pressure, as well as layout of underground magazine, which takes a safety for explosion and a working space of loading/unloading machine into consideration. On the layout, in case of ${\bigcirc}{\bigcirc}$ underground magazine, put three storage chambers in position almost parallel with principle stress direction, where less effected on discontinuity and hard rock area. Also, secured safe distance according to safety criteria of the Defense Ministry, and verified suitable layout by trace simulation for loading/unloading machine on working stage. Blasting design was performed on evaluation of maximum blast pressure between donar and acceptor chambers, and design condition for blast door, valve, etc. Diminution facilities against explosion, such as thrust block or debris trap, determined its size after plan in accordance with blasting criteria and calculation by structural analysis.

• 전기의세계
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• v.25 no.2
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• pp.35-39
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• 1976

공업사상, 화학공장 및 탄갱에서의 가스폭발에 의하여 인류가 입은 피해는 막대하다. 설비 및 기타 경제적 손실은 물론, 많은 귀중한 생명까지도 잃어버리는 경우가 허다하였다. 최근에 와서는 석유류를 기초재료로 하는 산업이 급격히 증대됨에 따라 사업장내에 있어서의 위헙한 원재료의 취급량이 급격히 불어나고 위험장소의 범위도 확대됨에 따라 만일 사고가 발생하면 해당공장 뿐만 아나라 인접공장 및 부근의 일반주택에 까지도 그 피해가 파급되는 일이 종종 일어나고 있어 주위에 큰 불안을 안겨주고 있다. 몇몇 외국의 화학공장에서는 가연성액체의 누출에 의한 미증유의 대폭발이 일어나 그 점화원이 전기의 스파크가 아닌가 하고 생각될 때가 있다. 이러한 산업계에서의 위험률의 증가추세에 비추어 볼때, 앞으로의 방폭전기설비의 수요는 급격히 늘어날 것이 예상되며 그 방폭성에 있어서도 한층더 신뢰성이 높은 것이 요청된다. 그러나 아직도 한국에서는 외자도입시설이 아닌곳에서는 전기기기의 방폭운전이 일반화되어 있지 못하고 있어 효과적인 방폭전기운전방식의 채용 및 방폭구조를 가진 전기기기의 개발이 시급히 요청되고 있다.

• Journal of the Society of Disaster Information
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• v.10 no.1
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• pp.91-97
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• 2014

purpose of this study was to conduct status survey on existing shelter facilities for residents and use it as basic material to plan and design improved shelter facilities in the future. As the result, first, although existing shelter facilities are judged to have been designed in consideration only of the protection from high explosive shells, actual protection capability is significantly low against high explosive shells when exit direction and protection capabilities of main entrances were investigated. Second, all the 7 facilities did not have air purifier with filters installed for the air that flows into the inside from outside and since the height of air exhausts and intake pipes in the outside are also close to the earth, there are possibilities that heavy contaminated air can flow into the inside. Third, although some facilities have anti-explosion doors installed, it is impossible to use them as chemical, biological and radiological (CBR) shelter because of improper installation of openings and anti-explosion valves as well as poor plumbing that cannot ensure air-tightness and poor finish of piping penetration.

• Electric Engineers Magazine
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• v.209 no.1
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• pp.38-42
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• 2000

전기관계법령에 의거 전력시설물의 설계, 공사, 감리, 유지 및 관리를 담당해야 하는 전력기술인들이 각종 업역에서 전기로 인한 재해를 줄이기를 바라는 마음에서 관련법령에 근거, 전력시설을 방폭설비를 하는 이유와 폭발재해와 그 대책에 대하여 서술하오니 전력기술업무에 참고하길 바랍니다.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.8 no.6
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• pp.22-28
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• 1994

• Journal of the Korean Institute of Gas
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• v.26 no.1
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• pp.27-33
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• 2022

As the scale of explosions diversifies along with the expansion of gas handling and storage facilities, studies on explosion-proof facilities in preparation for accidents is being actively conducted. The gastight door blocks the expansion pressure caused by blast waves or internal fires, and at the same time protects the personnel and equipment inside. For gastight doors, the regulations related to explosion-proof design are not clearly presented, and studies on the explosion pressure resistance performance evaluation of the facility are insufficient. In this study, the gastight door was modeled in a 3D shape with reference to the regulation ASTM regarding the gastight door standard. Afterwards, evaluation for blast-resistant performance of gastight door using Numerical simulation was evaluated by using ANSYS Explicit Dynamics to compare the deformation.

• Journal of the Korean Institute of Gas
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• v.20 no.3
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• pp.59-65
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• 2016

It is imperative to use suitable explosion proof equipments to prevent explosion in different gas facilities. There is no technical standard for the classification of hazardous areas though standard of explosion proof is regulated. In this study, we have adopted Industrial Standard KS to develop the methodology for the prediction of the explosion risk in the natural gas facility with low pressure using the important factors including hole size, hypothetical volume, validation of ventilation effectiveness. The applicability of the developed methodology was evaluated by the comparison with the data obtained from experiments of natural gas explosion.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 1999.06a
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• pp.87-92
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• 1999

최근 우리나라에서는 가스사용시설의 확대, 석유화학 플랜트의 급격한 성장 및 LNG, 원유 등의 운반에 필요한 특수선의 증가등으로 인하여 사회 일상주변에 각종의 인화성 액체 또는 폭발성가스가 존재하는 기회가 많아 졌으며, 폭발성 위험물질의 취급이 점차 대규모화, 다양화, 복잡화 되어가고 있다. 이러한 현실속에서 폭발사고 방지에 대한 연구와 폭발성가스가 존재하거나 존재할 우려가 있는 위험장소에서 사용되는 방폭형 전기기기의 방폭성능에 대한 확인과 안전성을 평가하는 기술의 확립이 필요하다. (중략)

• 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.

• Journal of the Korean Society for Geothermal and Hydrothermal Energy
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• v.14 no.3
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• pp.21-28
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• 2018

This paper presents two-step simulations to calculate the influence of blast-induced pressures on explosion-protection valves installed at the boundary between a protection facility and a tunnel entering the facility. The first step is to calculate the respective overpressure on the entrance and exit of the tunnel when an explosion occurs near the tunnel entrance and exit to approach the protection facility. Secondly, the blast pressures on the explosion-protection valves mounted to walls located near the tunnel inside approaching the protection facility are analyzed with a 0.1 ms time variation using the results obtained from the first-step calculations. The following conclusions could be derived as a results: (1) The analysis of the entrance tunnel scenario, P1, leads to the maximum overpressure of 47 kPa, approximately a half of the ambient pressure, at the inner entrance due to the effect of blast barrier. For the scenario, P2, the case not blocked by the barrier, the maximum overpressure is 628 kPa, which is relatively high, namely, 5.2 times the ambient pressure. (2) It is observed that the pressure for the entrance tunnel is effectively mitigated because the initial blast pressures are partially offset from each other according to the geometry of the entrance and a portion of the pressures is discharged to the outside.