• 제목/요약/키워드: Fire risk assessment

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Measurement and Investigation of Combustible Characteristics for Risk Assessment of Toluene (톨루엔의 위험성 평가를 위한 연소특성치 측정 및 고찰)

  • Ha, Dong-Myeong;Jeong, Kee-Sin
    • Fire Science and Engineering
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    • v.24 no.2
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    • pp.76-81
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    • 2010
  • For the safe handling of toluene, explosion limit at $25^{\circ}C$ and the temperature dependence of the explosion limits were investigated. And flash point and AIT (Autoignition Temperature) for toluene were experimented. By using the literature data, the lower and upper explosion limits of toluene recommended 1.13 vol% and 7.9 vol%, respectively. In this study, measured the lower and upper flash points of toluene by air-blowing tester were $5^{\circ}C$ and $40^{\circ}C$, respectively. And measured the upper flash points of toluene by Setaflash tester was $41.5^{\circ}C$. This study measured relationship between the AITs and the ignition delay times by using ASTM E659-78 apparatus for toluene, and the experimental AIT of toluene was $547^{\circ}C$. The new equations for predicting the temperature dependence of the explosion limits of toluene is proposed. The values calculated by the proposed equations were a good agreement with the literature data.

The Study of Outflow Rate of Stair and Turnstile in Subway Station - Comparison between Measurement and Simulation (지하철 역사에서 개찰구 및 계단 유출특성에 관한 연구 - 실측과 시뮬레이션의 비교)

  • Kim, Eung-Sik;Cho, Ju-Ho;Kim, Myeoung-Hun
    • Fire Science and Engineering
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    • v.24 no.3
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    • pp.33-38
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    • 2010
  • Recently commercial egress softwares are frequently used for the risk assessment. The estimation of evacuation time is an important procedure and the outflow coefficient in a bottleneck becomes the crucial factor for design of emergency planning. This paper compares the outflow coefficient of measurement with those of softwares in the bottlenecks of subway stations where masses of people movement is observed. Stairway and turnstile are the 2 bottleneck points along escape pathway. For the escape simulation it is recommended that 2 different modes be used in the programs for 2 kinds of bottleneck. The results of the comparison makes a big difference among them and some of differences can be reduced by correct design of input data. In conclusion the results of simulation should be examined thoroughly by procedure of comparisons with other results.

Risk Assessment of Fire and Explosion of Methane (메탄의 화재 및 폭발 위험성 평가)

  • Ha Dong-Myeong
    • Journal of the Korean Institute of Gas
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    • v.9 no.2 s.27
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    • pp.1-7
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    • 2005
  • The thermochemical parameters for safe handling, storage, transport, operation and process design of flammable substances are explosive limit, flash point, autoignition temperature, minimum oxygen concentration, heat of combustion etc.. Explosive limit and autoignition temperature are the major physical properties used to determine the fire and explosion hazards of the flammable substances. Explosive limit and autoignition temperature of methane fur LNG process safety were investigated. By using the literatures data, the lower and upper explosive limits of methane recommended 4.8 vol$\%$ and 16 vol$\%$, respectively. Also autoignition temperatures of methane with ignition sources recommended $540^{\circ}C$ at the electrically heated cruicible furnace (the whole surface heating) and recommended about $1000^{\circ}C$ in the local hot surface. The new equations for predicting the temperature dependence and the pressure dependence of the lower explosive limits for methane are proposed. The values calculated by the proposed equations were a good agreement with the literature data.

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Development of Disaster Safety Program for Small-sized Workplaces and Its Introduction to Occupational Safety&Health Act: Focusing on Fire, Explosion and Chemical Spill (소규모 사업장 재난안전 프로그램 개발 및 산업안전보건법에의 도입방안: 화재, 폭발, 약품 누출을 중심으로)

  • Ko, Seung-cheol;Eum, Tae-Soo;Song, Chang-Geun
    • Journal of Convergence for Information Technology
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    • v.11 no.7
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    • pp.84-90
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    • 2021
  • 98.8% of accidents occurring in domestic companies are concentrated in small-sized workplaces with fewer than 50 employees. Therefore, this study developed a disaster safety program that can be implemented by small and medium-sized enterprises by comparing and analyzing the safety management system actively used with the laws and regulations related to industrial safety and facilities. The disaster and safety program included the scope of application, organizational structure, risk assessment, emergency response system, education and training, safety equipment provision and program evaluation, and detailed preparation methods and procedures for each item. In addition, items to be aware of when operating a disaster safety program and operational strategies were presented. After that, it was proposed to introduce the research results into the Occupational Safety and Health Act.

How to Reflect Sustainable Development in Overseas Investment including Equator Principles (해외투자(海外投資)와 지속가능발전 원칙 - 적도원칙(赤道原則)(Equator Principles)을 중심으로 -)

  • Park, Whon-Il
    • 한국무역상무학회:학술대회논문집
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    • 2006.06a
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    • pp.45-72
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    • 2006
  • The Equator Principles are a set of voluntary environmental and social guidelines for ethical project finance. These principles commit banks and other signatories to not finance projects that fail to meet these guidelines. The principles were conceived in 2002 on an initiative of the International Finance Corporation and launched in 2003. Since then, dozens of major banks have adopted the Principles, and with these banks among them accounting for more than three quarters of all project loan market volume the Principles have become the de facto standard for all banks and investors on how to deal with potential social and environmental effects of projects to be financed. While regarding the Principles an important initiative, NGOs have criticised the Principles for not producing real changes in financing activities and for allowing projects to go through that should have been screened out by the Principles, such as the Sakhalin-II oil and gas project in Russia. In early 2006, a process of revision of the principles was begun. The Equator Principles state that endorsing banks will only provide loans directly to projects under the following circumstances: - The risk of the project is categorized in accordance with internal guidelines based upon the environmental and social screening criteria of the International Finance Corporation (IFC). - For all medium or high risk projects (Category A and B projects), sponsors complete an Environmental Assessment, the preparation of which must meet certain requirements and satisfactorily address key environmental and social issues. - The Environmental Assessment report addresses baseline environmental and social conditions, requirements under host country laws and regulations, applicable international treaties and agreements, sustainable development and use of renewable natural resources, protection of human health, cultural properties, and biodiversity, including endangered species and sensitive ecosystems, use of dangerous substances, major hazards, occupational health and safety, fire prevention and life safety, socio-economic impacts, land acquisition and land use, involuntary resettlement, impacts on indigenous peoples and communities, cumulative impacts of existing projects, the proposed project, and anticipated future projects, participation of affected parties in the design, review and implementation of the project, consideration of feasible environmentally and socially preferable alternatives, efficient production, delivery and use of energy, pollution prevention and waste minimization, pollution controls (liquid effluents and air emissions) and solid and chemical waste management. - Based on the Environmental Assessment, Equator banks then make agreements with their clients on how they mitigate, monitor and manage those risks through an 'Environmental Management Plan'. Compliance with the plan is required in the covenant. If the borrower doesn't comply with the agreed terms, the bank will take corrective action, which if unsuccessful, could ultimately result in the bank canceling the loan and demanding immediate repayment. - For risky projects, the borrower consults with stakeholders (NGO's and project affected groups) and provides them with information on the risks of the project. - If necessary, an expert is consulted. The Principles only apply to projects over 50 million US dollars, which, according to the Equator Principles website, represent 97% of the total market. In early 2006, the financial institutions behind the Principles launched stakeholder consultations and negotiations aimed at revising the principles. The draft revised principles were met with criticism from NGO stakeholders, who in a joint position paper argued that the draft fails by ignoring the most serious critiques of the principles: a lack of consistent and rigorous implementation.

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A Study on Construction of Disaster Management System at a Large-scale Concert (대형공연 시 재난관리시스템의 구축에 관한 연구)

  • Min, Se Hong
    • Journal of the Korea Safety Management & Science
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    • v.15 no.4
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    • pp.17-24
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    • 2013
  • On this study, we extracted pending problem and controversial point from management of disaster such as terror for domestic massive performance and then, investigated countermeasure plan against disaster for massive performance through comparison and analysis between anti-disaster strategy of Korea and U.S. U.S are conducting security system actively for passenger of major facilities such as public institution. Nonetheless, In U.S that has the world's best security system, serious affair such as 911 terror and Boston marathon terror are continued to happen. When considering domestic situation that North Korea and South Korea are antagonistic to each other, it is judged when it is high time to prepare for threat of terrorism. Accordingly, On this study, through analyzing of latest terror attacks in U.S and disaster risk in the nation, we analyzed in detail countermeasure plan classified as legislation, operation of security system, instilling a sense. As the result of this analyzing, using by flow-chart, we suggested domestic optimized disaster management system for massive performance. Consequently, we propose to establish systematized disaster management system such as preliminary survey of disaster influence for massive performance.

Characteristics of a Corona between a Wiring Clamp(Dead End Clamp) and a Porcelain Insulator Used in a 154[kV] Power Receptacle

  • Han, Un-Ki;Kim, Jong-Min;Bang, Sun-Bae;Kim, Han-Sang;Choi, Hyeong-Jun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.21 no.9
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    • pp.57-63
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    • 2007
  • The occurrence of a corona is that electrical discharge due to the heterogeneity that occurs when an electrical field is concentrated in an electrode due to a cusp formed on said electrode. Wire treatment at the end of a 154[kV] dead end clamp for end users accelerates the occurrence of corona, which in turn leads to power loss and noise. In this study, the characteristics of the corona which occurs between porcelain insulators and support clamps of overhead lines used in 154[kV] power receiving facilities for end users were investigated. The corona, which cannot be identified by one common method, was measured utilizing a UV image camera. A risk assessment for fire damage and its status was suggested. The stress distribution of the electrical field by length of bare wire was suggested by means of the finite element method(FEMLAB). As a result, it was found to affect a porcelain insulators. These results can be utilized for the enhancement of clamp installation and safety in power facilities.

A Study on the Overpressure Estimation of BLEVE (BLEVE로 인한 과압 예측에 관한 연구)

  • Kim In-Tae;Kim In-Won;Song Hee-Oeul
    • Journal of the Korean Institute of Gas
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    • v.4 no.1 s.9
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    • pp.69-76
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    • 2000
  • Explosion Quantities and flashing mass resulting from the variation of temperature are calculated by a computer program, BLEVE ESTIMATOR, to carry out the risk assessment of BLEVE. The damages caused by the BLEVE are estimated under the explosion of the simulation condition similar to the Puchun LP gas station accident, and the results are compared with the commercial program SAFER of Dupont CO. Explosion quantities and flashing mass increase exponentially with the increase of explosion temperature. These values for propane are relatively higher than those for n-butane. In conditions of higher vessel temperature, vessel pressure, and liquid ratio of containment, higher overpressures are calculated.

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The Analysis of the Priority and Progress Direction of Electrical Safety Technology using Analytic Hierarchy Process (계층분석과정(AHP)을 이용한 전기안전기술 우선순위 및 추진방향 분석연구)

  • Kim, Han-Sang;Yi, Geon-Ho;Kim, Dong-Woo;Jeon, Jeong-Chay;Lee, Ki-Yeon;Kim, Young-Seog;Jung, Jin-Soo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.12
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    • pp.1784-1791
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    • 2013
  • Electrical safety technique is a disaster prevention technology to protect the life and property of the people and it has high correlation with all electricity industry. According to the latest statistics, loss of human life and property damage due to electrical fire have increased from 2011. Therefore, technological development for guarantee safety of electrical facilities for customer will become more important. In this paper, we drew priority and weigh for the electrical safety technology using analytic hierarchy process and present progress direction of each technology through Risk-Return assessment. We expect development of the research and development policies of government about electrical safety technology in a higher state and think that policymakers and experts will be more interested in these fields based on this paper.

A Study on the Thermal Flux Estimation of Fireball (Fireball로 인한 Thermal flux 예측에 관한 연구)

  • Kim In-Tae;Kim In-Won;Song Hee-Oeul
    • Journal of the Korean Institute of Gas
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    • v.4 no.3 s.11
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    • pp.46-52
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    • 2000
  • In order to evaluate the risk assessment of Fireball, a program, FIRESTOR, was developed. With this program, thermal fluxes due to the fireball of propane and n-butane were predicted to analyze the damage of Puchen gas explosion accident and thermal fluxes compared with the BLEVE ESTIMATOR, and commercial program SAFER Dupont Co. Thermal fluxes with variation of distance from the explosion source by BLEVE ESTIMATOR, SAFER and FIRESTOR was made a comparative analysis each other for the constant pressure of propane and n-butane. The values calculated by FIRESTOR were between those by BLEVE ESTIMATOR and SAFER. Consequently FIRESTOR is proved to be an good program to analyze the damage of Fireball.

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