• Title/Summary/Keyword: Risk-Based Design

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A Study on Evacuees Risk Assesment for Application of Spatial Risk Information (공간위험정보를 적용한 대피자 위험성평가에 관한 연구)

  • Hong, Seungbum;Jang, Jae-Soon;Park, Hyun-A;Rie, Dong-Ho
    • Fire Science and Engineering
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    • v.29 no.2
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    • pp.8-12
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    • 2015
  • Performance Based Design is evaluating after each calculatiuon ASET and RSET. Risk informaion values such as heat, smoke, toxic gas etc are extracted by FDS in this study. These Risk informaion values by FDS apply Artisoc (evacuation simulator). Building structure made $60m{\times}65m$, exit number is made 2 positions and people in this building are 50 ramdonly. 20 times (case1~case 20) simulated and analysis evacuees risk by evacuated route positions.

A study on Selection Method of Safety Devices According to Process Trouble (공정 트러블에 따른 안전장치 선택방법에 관한 연구)

  • Ko, Jae-Wook;Jung, In-Hee;Jung, Sang-Yong
    • Journal of the Korean Institute of Gas
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    • v.13 no.1
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    • pp.52-60
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    • 2009
  • This study reflects the concept of risk-based design to present a systematic design means and a method to adjust regulations and standards towards a more reliable direction within the current law. In order to enhance the early design concentration and level in the part of safety design, a new Advanced Safety Analysis Table (ASAT) was developed to provide information on the systematized safety design element from the early design phase. Furthermore, a guideline was put forth about the selection of a safety device according to process trouble, on the basis of the ASAT. To apply the proposed ASAT and the selection method of a safety device according to process troubles, the ASAT was executed for the PGC (Process Gas Compressor) of the NCC (Naphtha Cracking Center), and the result of selecting the safety device was analyzed according to process trouble.

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Development and evaluation of a model-based HSE risk assessment module for HSE management in offshore wind power (해상풍력발전의 HSE 관리를 위한 모델기반 HSE 위험성 평가 모듈 개발 및 평가)

  • Seong Rae Kim;Keon Woo Nam;Tae Kyong Lee;Dae Young Kang;Joon Young Kim
    • Journal of the Korean Society of Systems Engineering
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    • v.19 no.2
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    • pp.74-91
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    • 2023
  • This study provides an in-depth comparison and analysis of various risk assessment models widely used in modern industries, and proposes the most suitable model for risk assessment of offshore wind power in Korea. The assessment models were selected by considering various factors such as the purpose of risk assessment, stakeholder requirements, and characteristics of offshore wind power. We also emphasized the importance of using different risk assessment models in combination in situations of high uncertainty. To systematize the combination of risk assessment models, we used systems engineering which is effective to develop a new system. Systems engineering was used to define the complete, traceable functions from site requirements, and model-based systems engineering was used to manage the design information from requirements to detailed functions in a single model. The developed risk assessment module provide automatic conversion between risk assessment models to enable risk assessment suitable for offshore wind power. The functionality and usability of the offshore wind risk assessment module were verified by the evaluation of three wind power experts.

Estimation of Environmental Costs Based on Size of Oil Tanker Involved in Accident using Neural Network (신경망을 이용한 유조선 기름 유출사고에 따른 환경비용 추정에 관한 연구)

  • Shin, Sung-Chul;Bae, Jeong-Hoon;Kim, Hyun-Soo;Kim, Seong-Hoon;Kim, Soo-Young;Lee, Jong-Kap
    • Journal of Ocean Engineering and Technology
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    • v.26 no.1
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    • pp.60-63
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    • 2012
  • The accident risks in the marine environment are increasing because of the tendency to build faster and larger ships. To secure ship safety, risk-based ship design (RBSD) was recently suggested based on a formal safety assessment (FSA). In the process of RBSD, a ship designer decides which risk reduction option is most cost-effective in the design stage using a cost-benefit analysis (CBA). There are three dimensions of risk in this CBA: fatality, environment, and asset. In this paper, we present an approach to estimate the environmental costs based on the size of an oil tanker involved in an accident using a neural network. An appropriate neural network model is suggested for the estimation,and the neural network is trained using IOPCF data. Finally,the learned neural network is compared with the cost regression equation by IMO MEPC 62/WP.13 (2011).

A study on the City-gas Pipeline Management System by Reliability Based Design and Assessment (신뢰도평가 기반 도시가스배관 종합관리시스템 구축 연구)

  • Oh, Dong-Seok;Lee, Jin-Han
    • Journal of the Korean Institute of Gas
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    • v.22 no.6
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    • pp.129-135
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    • 2018
  • For efficiently safety management of city gas pipelines, the City-gas Pipeline Management System(CPMS) has been developed to systematically manage and analyze the data collected from 33 city gas companies and to effectively perform internal and external affairs related to gas safety management. The piping information data uploaded to the CPMS is ranked the risk according to the criteria specified in the KGS Code, and the safety management of the piping has performed close inspection according to the risk ranking. However, the criteria for deriving the risk ranking is very simple and lacks relevant grounds, and the reliability for the determination of the close inspection pipeline is no high due to the redundant rank. Therefore, we developed a risk assessment program based on the Reliability Based Design Assessment(RBDA) methodology and tried to derive a reasonable risk ranking by linking it with the CPMS system.

Distribution of average intervent times between adjacent rainfall events for overflow risk-based design of storm-water infiltration basin (월류위험도 기반 침투형저류지 설계를 위한 평균무강우지속시간도 작성)

  • Kim, Dae Geun;Park, Sun Jung
    • Journal of Korean Society of Water and Wastewater
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    • v.22 no.2
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    • pp.195-203
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    • 2008
  • This study collected the latest 30-year (1976~2005) continuous rainfall data hourly recorded at 61 meterological observatories in Korea. The continuous rainfall data was divided into individual rainfall events. In addition, distribution charts of average intervent times between adjacent rainfall events were created to facilitate the application to the overflow risk-based design of storm-water infiltration basin. This study shows that the one-parameter exponential distribution is suitable for the frequency distribution of the average intervent times for the domestic rainfall data. Distribution charts of the average intervent times were created for 4 hour and 6 hour of storm separation time, respectively. The inland Gyeongsangbuk-do and Western coastal area had relatively longer average intervent times, whereas Southern coastal area and Jeju-do had relatively shorter average intervent times.

Design Strength of Bridges against Ship Collision according to Vessel Traffic (선박통행량에 따른 교량의 선박충돌 설계강도)

  • Lee Seong-Lo;Lee Byung-Hwa;Kang Sung-Soo
    • Proceedings of the Korea Concrete Institute Conference
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    • 2004.11a
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    • pp.663-666
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    • 2004
  • An analysis of the annual frequency of collapse(AF) is performed for each bridge pier exposed to ship collision. AF is computed for each bridge component and vessel classification. The summation of AFs computed over all of the vessel classification intervals for a specific component should equal the annual frequency of collapse of the component. The designer should use judgment in developing a distribution of the vessel frequency data based on discrete groupings or categories of vessel size by DWT. In the present study the effect of vessel classification on the annual frequency of collapse in the ship collision risk assessment is investigated by illustrative numerical examples based on the vessel frequency data of the domestic harbor. The DWT interval for larger vessels has more effect on the ship collision risk. Therefore the expert judgement in determining the larger DWT interval is required because the design impact lateral resistances of bridge components depend on the ship collision risk.

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The Safety Design of Corrosive Chemical Handling Process based on Reliability Database (신뢰도 데이터베이스 기반 부식성 화학물질 취급공정의 안전설계)

  • Chu, Chang Yeop;Baek, Jong Bae
    • Journal of the Korean Society of Safety
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    • v.33 no.5
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    • pp.141-149
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    • 2018
  • In a PCB factory, there is a corrosive chemical substance supply system that can causes major leakage accidents. These accidents can give rise to shut down the factory and do residents damage that cause enormous loss of properties. To mitigate these risks, it is necessary to provide a chemical disaster prevention system. Moreover, after considering the situation and environment of the production site, it is of great importance to build an optimal chemical accident prevention system by reflecting risk reduction measures from the point of process design and by assessing quantitative risk based on reliability data. However, because there was no established database of the reliability about facilities and equipment that can be used in the domestic, the business site and consulting organization had being used the reliability data such as USA CCPS(Center for Chemical Process Safety). In these days, Korean institutes are studying on reliability data utilization method of quantitative risk assessment for preventing chemical accidents and domestic utilization algorithms and storage bed of reliability data. This study presents samples of reliability database about the chemical substance supply system that constructed from the history data such as failure, maintenance for 10 years at a PCB factory. Also, this work proposes the safety design criteria for supply facilities of corrosive chemical substance by assessing quantitative risk on the basis of the reliability data.

Development of Design Blast Load Model according to Probabilistic Explosion Risk in Industrial Facilities (플랜트 시설물의 확률론적 폭발 위험도에 따른 설계폭발하중 모델 개발)

  • Seung-Hoon Lee;Bo-Young Choi;Han-Soo Kim
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.37 no.1
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    • pp.1-8
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    • 2024
  • This paper employs stochastic processing techniques to analyze explosion risks in plant facilities based on explosion return periods. Release probability is calculated using data from the Health and Safety Executive (HSE), along with annual leakage frequency per plant provided by DNV. Ignition probability, derived from various researchers' findings, is then considered to calculate the explosion return period based on the release quantity. The explosion risk is assessed by examining the volume, radius, and blast load of the vapor cloud, taking into account the calculated explosion return period. The reference distance for the design blast load model is determined by comparing and analyzing the vapor cloud radius according to the return period, historical vapor cloud explosion cases, and blast-resistant design guidelines. Utilizing the multi-energy method, the blast load range corresponding to the explosion return period is presented. The proposed return period serves as a standard for the design blast load model, established through a comparative analysis of vapor cloud explosion cases and blast-resistant design guidelines. The outcomes of this study contribute to the development of a performance-based blast-resistant design framework for plant facilities.

Analysis of Likelihood of Failure for the Thinning of High Temperature Sulfide and Naphthenic Acid Corrosion through Risk Based Inspection using API-581 (API-581에 의한 위험기반검사에서 고온 황화물 및 나프텐산 부식의 두께감소에 의한 사고발생 가능성 해석)

  • Lee Hern-Chang;Lee Joong-Hee;Kim Tae-Ok
    • Journal of the Korea Safety Management & Science
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    • v.7 no.4
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    • pp.101-110
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    • 2005
  • The likelihood of failure for the thinning of high temperature sulfide and naphthenic acid corrosion, which affect to a risk of facilities, was analyzed through the risk based inspection using API-581 BRD. We found that the corrosion rate was increased with increasing temperature and total acid number(TAN). And maximum value of the technical module subfactor(TMSF) was not varied with operating condition, but the TMSF was sensitively changed at the range of low temperature, low flow rate, and high TAN. Also, the TMSF was increased as an used year and inspection effectiveness increased, but it was increased as thickness, inspection number, and over design decreased.