• Title/Summary/Keyword: risk ranking

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Fire Risk Prediction and Fire Risk Rating Evaluation of Four Wood Types by Comparing Chung's Equation-IX and Chung's Equation-XII (Chung's Equation-IX과 Chung's Equation-XII의 비교에 의한 목재 4종의 화재위험성 예측 및 화재위험성 등급 평가)

  • JiSun You;Yeong-Jin Chung
    • Applied Chemistry for Engineering
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    • v.35 no.3
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    • pp.200-208
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    • 2024
  • Chung's equations-IX and Chung's equation-XII were utilized to predict the fire risk and evaluate fire risk ratings for four types of wood: camphor, cherry, rubber, and elm trees. The combustion tests were conducted using a cone calorimeter test method by ISO 5660-1 standards. The fire risk and fire risk rating (FRR) were compared for Fire Risk Index-IX (FRI-IX) and Fire Risk Index-XII (FRI-XII). The results yielded Fire Performance Index-XI (FPI-XI) ranging from 0.08 to 11.48 and Fire Growth Index-XI (FGI-XI) ranging from 0.67 to 111.89. The Fire Risk Index-XII (FRI-XII), indicating fire risk rating, exhibited an increasing order of cherry (0.45): Grade A (Ranking 5) < PMMA (1): Grade A (Ranking 4) < elm (1.23): Grade A (Ranking 3) < rubber (1.56): Grade A (Ranking 2) << camphor (148.23): Grade G (Ranking 1). Additionally, the fire risk index-IX (FRI-IX) was cherry (0): Grade A (Ranking 3) ≈ rubber (0): Grade A (Ranking 3) ≈ elm tree (0): Grade A (Ranking 3) < PMMA (1): Grade A (Ranking 2) << camphor tree (66.67): Grade G (Ranking 1). In general, camphor was found to have the highest fire risk. In conclusion, although the expression of the index is different as shown based on the standards of FRI-IX and FRI-XII, predictions based on fire risk assessment of combustible materials showed similar trends.

A Determining Contingency Ranking Using the Weather Effects of the Power System (날씨효과를 고려한 전력계통의 상정사고 순위 결정)

  • 김경영;이승혁;김진오;김태균;전동훈;차승태
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.53 no.9
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    • pp.487-493
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    • 2004
  • The electric power industry throughout the world is undergoing considerable changes from the vertically integrated utility structure to the deregulated market. However, the deregulated electricity market is operated with respect to theory of economical efficiency, and therefore, the system operator requires data with fast contingency ranking for security of the bulk power system. This paper compares the weather dependant probabilistic risk index(PRI) with the system performance index for power flow in the IEEE-RTS. The system performance index for power flow presents the power system stability. This paper presents fast calculation method for determining contingency ranking using the weather dependant probabilistic risk index(PRI). The probabilistic risk index can be classified into the case of normal and adverse weather. This paper proposes calculation method using the probabilistic risk index in determining contingency ranking required for security under the deregulated electricity market.

Debris Flow Risk Evaluation and Ranking Method for Drainage Basin adjacent to Road (도로인근 유역의 토석류 위험평가 및 등급화 방안)

  • Kim, Kyung-Suk;Jang, Hyun-Ick
    • Proceedings of the Korean Geotechical Society Conference
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    • 2010.03a
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    • pp.279-290
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    • 2010
  • Technical countermeasures against debris flow should be established upon the risk level of the target location. Risk of debris flow should consider the hazard imposed by debris flow and vulnerability of the facilities to debris flow. In this research, we have defined the target location for risk evaluation and suggested scoring method of hazard of debris flow and vulnerability of road to debris flow. By defining risk rank into 6 categories in terms of possibility of damage during rainfall and using the risk scores of 46 debris flow cases, we have suggested risk ranking matrix. The method can be used in ranking the drainage basin adjacent to road by simply determining the hazard with vulnerability score and can be used for planning the debris flow countermeasures.

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Determining of Risk Ranking for Processed Foods in Korea (국내 주요 가공식품에 대한 위해순위 결정)

  • Bahk, Gyung-Jin
    • Journal of Food Hygiene and Safety
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    • v.24 no.3
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    • pp.200-203
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    • 2009
  • The risk ranking of food groups included the Korea Food Code is a potentially powerful means to prioritize food safety management strategies. Although the interest in risk ranking of food groups has been increasing worldwide, there was, until recently, no standard system in Korea for the risk ranking of food groups. This study was conducted to rank food groups using theoretically estimated comparative risk scores of 101 food groups included the Korea Food Code. These scores were estimated using the risk evaluation model, which focuses on 3 aspects, namely, exposure assessment, severity assessment, and consumption part. The results of this study revealed that the risk was the highest in the case of ready-to-eat (RTE) food items, followed by fish products and breads. Using this ranking system, we can identify the food with high risk scores and design risk management strategies targeted specifically at these items.

Human Health Risk based Priority Ranking for Hazardous Air Pollutants (대기중 유해 화학 물질의 인체 위해도 우선순위 선정 연구)

  • Park Hoa-sung;Kim Ye-shin;Lee Dong-soo;Shin Dong-chun
    • Environmental Analysis Health and Toxicology
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    • v.19 no.1
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    • pp.81-91
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    • 2004
  • Although it is suggested that risk -based management plan is needed to manage air pollution effectively, we have no resources enough to evaluate all aspects of substances and set priorities. So we need to develop a logical and easy risk-based priority setting method. However, it if impossible that only one generic system that is consistent with all the use is developed. In this study, we proposed a human health risk based priority-setting method for hazardous air pollutants, and ranked priorities for this method. First of all, after investigating previous chemical ranking and scoring systems, we chose appropriate indicators and logics to goal of this study and made a chemical priority ranking method using these. As results, final scores in priority ranking method were derived for 25 substances, and ethylene oxide, acrylonitrile and vinyl chloride were included in high ranks. In addition, same substances were highly ranked when using default values like when using no default, but the scores of hydrofluoric acid and ryan and compounds were sensitive to default values. This study could be important that priorities were set including toxicity type and quality and local inherent exposure conditions and we can set area-specific management guidelines and survey plans as a screening tool.

Determining Contingency Ranking Using the Probabilistic Method of the Power System (확률적 방법을 이용한 전력계통의 상정사고 순위 결정)

  • Kim, Kyoung-Young;Lee, Seung-Hyuk;Kim, Jin-O;Kim, Tae-Kyun
    • Proceedings of the KIEE Conference
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    • 2003.07a
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    • pp.113-115
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    • 2003
  • The electric power industry throughout the world is undergoing considerable changes from the vertically integrated utility structure to the deregulated market. However, the deregulated electricity market is operated with respect to theory of economical efficiency, and therefore, the system operator requires data with fast contingency ranking for security of the bulk power system. This paper presents fast calculation method for determining contingency ranking using the weather dependant probabilistic risk index(PRI). The probabilistic risk index can be classified into normal weather and adverse weather. This paper proposes calculation method using the probabilistic risk index in determining contingency ranking requiring for security under the deregulated electricity market.

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Determination of Risk Ranking of Combination of Potentially Hazardous Foods and Foodborne Pathogens Using a Risk Ranger (Risk Ranger를 활용한 잠재적 위해식품과 미생물 조합에 대한 위해순위 결정)

  • Min, Kyung-Jin;Hwang, In-Gyun;Lee, Soon-Ho;Cho, Joon-Il;Yoon, Ki-Sun
    • Journal of Food Hygiene and Safety
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    • v.26 no.2
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    • pp.91-99
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    • 2011
  • Risk ranking must be determined for various hazards/food combinations to conduct microbial risk management effectively. Risk Ranger is a simple, easy-to-use calculation tool developed in Microsoft Excel and designed to rank the risk (low, medium, and high) for semi-quantitative microbial risk assessment. The user is required to answer 11 questions in Risk Ranger related to 1) severity of the hazard, 2) likelihood of a disease-causing dose of the hazard being present in the meal, and 3) the probability of exposure to the hazard in a defined time. This study determined the risk ranking for twenty three combinations of foodborne pathogens/potentially hazardous foods (PHFs) using a Risk Ranger. In this study, pathogenic E. coli in fresh cut produce salad was scored as 79, which was the highest rank among the 23 combinations of the foodborne pathogens and PHFs. On the other hand, zero risk was obtained with V parahaemolyticus in sushi, Salmonella in meat products and E. coli O157:H7 in hamburger patties. Although Risk Ranger is very simple method to rate the risk of foodborne pathogens and PHFs combination, the accuracy of result was mainly affected by the availability and accuracy of data in the literature. According to the result of literature review, the data are needed for contamination rate of raw materials, consumption amount/frequency of PHFs, and the effect of processing on pathogen. Risk ranking must be continuously revalidated with new data.

A Study on the Selection of Candidates for Substances Subject to Permission Using Chemicals Ranking and Scoring (CRS) (화학물질 우선순위 선정기법(CRS)을 활용한 허가대상 후보물질 선정 연구)

  • Kim, Hyo-dong;Park, Kyo-shik
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.32 no.3
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    • pp.253-267
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    • 2022
  • Objectives: This study was performed to check whether the CRS (Chemical Ranking and Scoring) system is appropriate as a method to determine substances as candidates for substances subject to permission and to apply this system to the selection of candidates for substances subject to permission. Methods: A risk score was obtained by multiplying the hazard score and the exposure score and then ranking them. The hazard sub-indicators are carcinogenicity, germ cell mutagenicity, reproductive toxicity, specific target organ toxicity-repeated exposure, respiratory sensitization and endocrine disrupting chemicals. Exposure sub-indicators are persistence, bioaccumulation and emission volume. Sensitivity analysis was performed for missing values. Correlation analysis and multivariable linear regression analysis were performed among hazard, exposure and risk in order to confirm that CRS was an appropriate method. Results: As a result of the sensitivity analysis on missing values, it was confirmed that the effect on the risk ranking was not sensitive. Correlation and regression analysis confirmed that exposure had a greater effect on risk than hazard. Conclusions: The CRS system, which derives a risk score using a hazard and exposure score, is judged to be appropriate as a method for the selection of preliminary of candidates for substances subject to permission. Benzene, cadmium, nickel, and cobalt were selected as priority candidates for substances subject to permission.

Risk-based Priority Ranking for Air Pollution Problems in Seoul (서울 지역에서 인체 위해도에 입각한 대기오염물질의 관리 우선 순위 선정에 관한 연구)

  • 김예신;박화성;이용진;임영욱;신동천
    • Journal of Korean Society for Atmospheric Environment
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    • v.19 no.2
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    • pp.205-216
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    • 2003
  • We have gathered exposure data on ambient air quality level and investigated dose-response slope factors of air pollutants such as fine particle, HAPs (metals, VOCs, PAHs) and dioxins in Seoul. Theoretical mortality incidences were estimated from exposure to these pollutants. From the results, priorities were ranked in the order fine particle, metals, VOCs, dioxins and PAHs by ordinal scale, and the uncertainties relative to those risk estimates were described.

Exploratory Study on Risk Factors by Project Performance Areas in Software Project Management (정보시스템 프로젝트의 성과영역별 위험요인에 관한 탐색적 연구)

  • Lee Seogjun;Kim HaeJung;Suh Hyunsuk
    • Journal of Information Technology Applications and Management
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    • v.11 no.4
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    • pp.103-120
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    • 2004
  • Identifying validated risk factors in software risk management is imperative for project managers. Although validated risk lists were provided by previous researchers, risk list associated with software project performance areas was not provided as yet. This paper represents a first step toward understanding risk lists by various project performance areas (time, cost, and quality) to help project managers alleviating the possibility of software project failure. Four simultaneous exploratory surveys were conducted with 29 experienced software project managers. Three different risk factor ranking sets for each project performance area were compared with, the risk ranking, which was provided without clarifying specific project performance areas. The risk lists and their corresponding perceived importance were different from previous research results. This implies that identifying risk factors for specific project performance areas can provide additional information for project managers. We concluded by discussing implications of our finds for both research and improving risk management practice.

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