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옥내 누출로 액체 풀에 의한 폭발성 가스 분위기 형성시 폭발위험범위 계산에 적합한 증발량 퍼센트(%) 선정에 관한 연구
노순미,황성민,천영우,이중희 한국위험물학회 2024 한국위험물학회지 Vol.11 No.2
Businesses handling chemical substances must establish fundamental measures in advance to prepare for accidents caused by hazardous materials, such as leaks, fires, and explosions, due to the significant risks they pose. The categorization of explosive hazardous areas is an integral part of these safety measures. In this study, we observed changes in the explosive hazardous area based on variations in ambient temperature and the evaporation percentage(%) resulting from a 200L leakage of toluene, benzene, and acetone stored in indoor tank storage. Toluene and benzene share the same lower explosive limit(LEL, %vol) and have similar densities. However, differences in vapor pressure lead to distinctions in the explosive hazardous area. Benzene and acetone appear to be influenced by both LEL(%vol) and vapor pressure when calculating the explosive hazardous area. In the future, refining criteria based on vapor pressure and LEL(%vol), and analyzing and evaluating the explosive hazardous area within the facility according to the evaporation percentage(%), is anticipated. This approach aims to propose an applicable and appropriate evaporation percentage(%) for calculating the explosive hazardous area.
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인화성 액체 옥외저장탱크에서 풀화재 발생 시 장내 피해 저감을 위한 방화벽 설계에 관한 연구
노순미(Sun Mi Ro),천영우(Young Woo Chon),이익모(Ik Mo Lee),황용우(Yong Woo Hwang) 한국위험물학회 2017 한국위험물학회지 Vol.5 No.1
Toluene & methanol are classified as flammable liquids and regulated by the Industrial Safety And Health Act, the Chemicals Control Act, and the Safety Control Of Dangerous Substances Act. They are used widely across the industry. The chances of accidents caused by leak·fire·explosion of those two flammable liquids are growing bigger every day. This study is about designing appropriate height of firewalls for toluene & methanol outdoor storage tank’s pool fire accidents. Considering input variables, such as thermal radiation, orifice diameter and elevation, for PHAST program, we can get the result of effect distances. Moreover, regardless of weather conditions, effect distances of toluene & methanol outdoor storage tank’s pool fire cases influence buildings that are 3 m away. Therefore, we should prepare more measures to prevent property damage and casualties. In case of toluene, the calculated minimum firewall height is 10.97 m at 1.5 m distance and 8.0 m at 3.0 m distance. In case of methanol the calculated minimum firewall height is 6.65 m at 1.5 m distance and 8.0 m at 3.0 m distance. The result of the firewall height is taller than the building it needs to protect, but installing an 8 m high firewall for prevention is unpractical and unrealistic. In this context, it is better to replacing the buildings’ outer wall with fireproof constructions instead of installing a firewall to reflect reality more closely.
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박태순,노순미 서울産業大學校 2005 논문집 Vol.54 No.2
This study applied the cost-benefit theory in order to evaluate the financial reasonability of several methods relevant to the rockfall mitigation. The railroad line for the financial analysis is four lines having risks of rockfall, which are Young-dong line, Jung-sun line, Tae-baek line, and Joong-ang line. The significant conditions of study are 20m' section about each line based on the rockfall energy from 50kJ to lOOOkJ. This study has carried out the economical analysis such as Benefit-Cost Ratio(B/C), Net Present Value(NPV)', and Internal Rate of Return (IRR) through above mentioned conditions when various methods of the rockfall prevention including fences, walls, tunnels, and ring nets were constructed. As a result, this result shows what is the most efficient way in the aspects of economical efficiency. 본 연구는 낙석 저감에 관련된 여러 방법에서 경제적 합리성을 평가하기 위해 비용-편익 이론을 적용하였다. 경제성 분석을 위한 철도노선은 영동성, 정선선, 태백선, 중앙선으로 낙석의 위험을 갖고 있는 4개의 노선을 대상으로 하였다. 연구를 위한 중요한 조건은 50KJ에서 1000KJ의 낙석에너지를 갖고 있으며, 각 노선의 20m구간을 적용하였다. 낙석방지책, 낙석방지 옹벽, 피암터널과 링네트공법 등의 다양한 낙석방지공법이 실행될 때, 위에서 언급한 조건을 통해 편익-비용비(B/C), 순현재가치(NPV), 내부할인율(IRR)과 같은 경제성 분석을 수행하였다. 본 연구는 경제적인 효율성 측면에서 어떤 공법이 가장 효율적인 공법인지를 보여준다.
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신민호(Shin Min-Ho),이성혁(Lee Seong-Hoon),김현기(Kim Hyun-Ki),김정기(Kim Jung-Ki),노순미(Roh Soon Mi) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
Rockfall mitigation methods have been widely constructed along railway lines but aren"t estimated with any economic analysis methods up to now. Therefore, this study applied a benefit-cost analysis to rockfall mitigation method to determine whether it is indeed an economically efficient construction. The Benefits were estimated based on data collected from disaster history, and included three types of benefits that are originated by reduction of train accident, train delay and rockfall removing cost. The costs included both construction cost and the maintenance cost of the selected method. This analysis could clarify the investment effect of rockfall mitigation method that would be built at rockfall prone slope.
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