• Proceedings of KOSOMES biannual meeting
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• 2009.06a
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• pp.25-25
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• 2009

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1996.11a
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• pp.122-127
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• 1996

본 실험은 미국 Washington 주 V 도시에서 1987년과 1908년에 PCP 유출사고로 발생된 PCP 오염토양을 처리하는 연구로 heme과 과산화수소를 이용한 abiotic 기술로 14C-PCP를 이용하여 PCP의 거동조사로 물질수지 연구와 pan 연구를 통하여 오염토양에서 PCP 제거되는 분해능을 조사하였다. $^{14}$ C-PCP를 이용한 오염토양에서 물질수지는 2g 오염토양당 0.035 g heme과 0.11g 과산화수소를 첨가하여 반응 24시간 동안 반응시킨후 완전 산화율은 20%, 토양잔류 27%, 그리고 용매상에는 38%로 총 $^{14}$ C-PCP가 회수율은 85% 이었다. PCP 유출사고로 보관된 오염토양 처리를 위한 pan 연구결과 24시간내 초기 PCP 987 mg/kg soil에서 85%가 제거되고, 서서히 분해되어 33일 에는 95% 분해능을 보여주고 있다.

• Proceedings of the Korean Nuclear Society Conference
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• 2004.05a
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• pp.174.1-174.1
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• 2004

• Proceedings of the Korean Nuclear Society Conference
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• 2003.10a
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• pp.180-180
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• 2003

• Journal of Advanced Marine Engineering and Technology
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• v.40 no.3
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• pp.165-173
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• 2016

On March 11, 2011, a massive earthquake measuring 9.0 on the Richter scale and subsequent 10-.14 m waves struck the Fukushima Daiichi (FD) Nuclear Power Plant. The main and backup electric power was damaged preventing the cooling system from functioning. Fuel rods overheated and led to hydrogen explosions. If heat in the fuel rods is not dissipated, the nuclear fuel coating material (e.g., Zircaloy) reacts with water vapor to generate hydrogen at high temperatures. This hydrogen is released into the containment area. If the released hydrogen burns, the stability of the containment area is significantly impacted. In this study, researchers performed an explosion analysis in a high-risk explosion area, analyzing the hydrogen distribution in a containment building [1] and the effects of a hydrogen explosion on containment safety. Results indicated that a hydrogen explosion was possible throughout the containment building except the middle area. If an explosion occurs at the top of the containment building with more than 40% of the hydrogen collected or in the bottom right or left side of the of containment building, safety of the containment building could be threatened.

• 방재와보험
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• s.122
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• pp.36-44
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• 2007

BP 텍사스 시티의 석유정제소의 화재폭발은 2005년에 가장 많은 인명의 손실을 끼친 유동화자산의 화재폭발사고로서 15인의 생명을 앗아가고 200여 명의 사람을 다치게 하였다. 트럭 한 대의 역화(내연기관의 부정폭발)에서 시작된 점화원은 이성질체화시스템(ISOM) 대기암 통기구에서의 가연성 탄화수소 액체와 증발 기체를 발화시켰다. 화학안전위원회는 그 사고를 조사 및 검토한 후 BP사가 모든 면에서 기계적인 결함과 함께 안전성이 불완전하였음을 발견하였다. 본 고는 저자들이 미국화학안전위험조사위원회에 제출한 이들의 조사보고서를 번역 게재한 것이다.

• Journal of Hydrogen and New Energy
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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.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.4
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• pp.132-137
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• 2018

Although the number of chemical accidents has been declining since the Chemical Control Act of 2015, there have been repeated occurrences of similar types of accidents at printed circuit board (PCB) manufacturing facilities. These accidents were caused by the overflow of hydrochloric acid and hydrogen peroxide, which are toxic chemicals used in the printed circuit board manufacturing process. An analysis of the $Cl^-$ content to identify the cause of the accident showed that in the mixed route of hydrochloric acid and hydrogen peroxide, which are accidental substances, the $Cl^-$ concentration was 66.85 ppm in the hydrogen peroxide sample. Through reaction experiments, it was confirmed that the deformation of a PVC storage tank and generation of chlorine gas, which is a toxic gas, occurred due to reaction heat occurring up to $50.5^{\circ}C$. This paper proposes a facility safety management plan, including overcharge, overflow prevention, leak detection device, and separation tank design for mixing prevention in printed circuit board manufacturing facility etch process. To prevent the recurrence of accidents of the same type, the necessity of a periodic facility safety inspection and strengthening of the safety education of workers was discussed.

• Journal of the Korean Institute of Gas
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• v.16 no.6
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• pp.29-33
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• 2012

This paper is an attempt to give a concise overview of the state-of-the-art in the recent liquid hydrogen safety researches with unwanted event progress. The vessel of liquified hydrogen may fail and liquid hydrogen spilled. The hydrogen will immediately start to evaporate above a pool and make a hydrogen cloud. The cloud will disperse and can produce a vapor cloud explosion. The vessel containing the liquid hydrogen may not be able to cope with the boil-off due to heat influx, especially in case of a fire, and a BLEVE may occur. In equipment where it exists as compressed gas, a leak generates a jet of gas that can self-ignite immediately or after a short delay and produce a jet flame, or in case it ignites at a source a certain distance from the leak (delayed ignition), a flash fire occurs in the open and with confinement a deflagration or even detonation may develop. The up-to-date knowledge in these events, recent progress and future research are discussed in brief.

• Journal of the Korean Institute of Gas
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• v.24 no.5
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• pp.1-9
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• 2020

In Korea, hydrogen stations are being promoted and commercialized. However, the risk assessment for the hydrogen station is not clear. In particular, it is not clear how to calculate the risk and acceptable criteria for a hydrogen station. Therefore, in this study, three hydrogen stations being installed were selected and general risks were calculated and the social risk of each hydrogen station was calculated. In general, the method of risk assessment is individual/social risk. This is an individual's death rate considering the frequency of accidents, And the likelihood of death according to the number of nearby residents. These can be used to calculate the level of risk for a hydrogen station. However, this method of calculate risks is the criteria for judging whether it is acceptable are unclear. For this reason, this study investigated the allowable standards for foreign risks and considered that they were acceptable by applying the risks of selected domestic hydrogen stations.