• Title/Summary/Keyword: Facility risk

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A Study on Facility Criteria of Small Petrol Stations based on Quantitative Risk Assessment (정량적 위험성 평가에 기반한 간이 주유취급소 시설기준에 대한 연구)

  • Park, Wooin;Ku, Jae-Hyun;Song, Yong-Sun
    • Journal of the Korean Institute of Gas
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    • v.18 no.3
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    • pp.44-52
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    • 2014
  • Small petrol stations have great potential for a wide distribution in metropolitan area in which the land value possesses primary installation cost of the facility. The objective of the present study is to propose appropriate facility regulations of small petrol stations in Korea that can be popularly installed in the future in terms of securing safety in addition to serviceability. The hazard analysis and damage prediction from the possible fire and explosion accidents were performed using a software, PHAST v.6.5. As essential components of the facility regulations proposed in this study, the regulations about the refueling lot, maximum capacity of underground tank, location of fixed refueling facilities, height of firewall for small petrol stations were subsequently compared with those for regular-sized petrol stations.

Impact of Self-Presentation Text of Airbnb Hosts on Listing Performance by Facility Type (Airbnb 숙소 유형에 따른 호스트의 자기소개 텍스트가 공유성과에 미치는 영향)

  • Sim, Ji Hwan;Kim, So Young;Chung, Yeojin
    • Knowledge Management Research
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    • v.21 no.4
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    • pp.157-173
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    • 2020
  • In accommodation sharing economy, customers take a risk of uncertainty about product quality, which is an important factor affecting users' satisfaction. This risk can be lowered by the information disclosed by the facility provider. Self-presentation of the hosts can make a positive effect on listing performance by eliminating psychological distance through emotional interaction with users. This paper analyzed the self-presentation text provided by Airbnb hosts and found key aspects in the text. In order to extract the aspects from the text, host descriptions were separated into sentences and applied the Attention-Based Aspect Extraction method, an unsupervised neural attention model. Then, we investigated the relationship between aspects in the host description and the listing performance via linear regression models. In order to compare their impact between the three facility types(Entire home/apt, Private rooms, and Shared rooms), the interaction effects between the facility types and the aspect summaries were included in the model. We found that specific aspects had positive effects on the performance for each facility type, and provided implication on the marketing strategy to maximize the performance of the shared economy.

Social Network Analysis by Utilizing Disaster Risk Big Data (재난 위험신고 빅데이터를 활용한 사회연결망 분석)

  • Han, Ji-Ah;Jeong, Duk-Hoon
    • The Journal of Bigdata
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    • v.1 no.2
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    • pp.45-63
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    • 2016
  • According to changes of recent climate social structures, frequency of occurrence new or complex disasters are increasing. So the importance of disaster prevention is increasing. To provide useful information of disaster prevention activities, We use the "Safety Sinmungo" main processing practices included Facility safety management in Ministry of Public Safety and Security. Facility safety management is the most and common disaster prevention activities. We identified the keywords in the risk report and facilities to residents report and analyzed the seasonal and inter-regional facilities report distribution process. We also utilized social network analysis techniques to configure a 1-mode, 2-mode facilities around the keyword for differences.

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A Study on the Collecting Method of Reliability Database for Gas Facilities (가스설비의 신뢰도데이터 수집방법에 관한 연구)

  • Rhie, Kwang-Won;Yoon, Ik-Keun;Han, Sang-Tae;Oh, Sin-Kyu;Kim, Tae-Hun
    • Journal of the Korean Society of Safety
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    • v.23 no.2
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    • pp.37-44
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    • 2008
  • The safety assessment for facility industry is now being periodically performed. For the purpose of scientific safety management, QRA(Quantitative Risk Assessment) is also being performed, and reliability data of the facilities is essential to perform the assessment. Generally, the existing safety assessment is performed by using the values announced in other industry processes, which result in the drop of reliability. In order to solve this problem, there is an urgent need to establish reliability database for the facilities. The most appropriate method is to perform a direct reliability analysis towards the facilities undergoing safety assessment. In this study, in compliance with the assessment method and procedure of OREDA-2002 handbook, the facility reliability data are collected, which include the calendar time and operational time in terms of different facility items, the number of failures in terms of different failure mode, the mean, standard deviation, lower limit and upper limit of failure rate, and the failure rate. And the data process method for this special occasion is also proposed when the number of failure is 0.

Flow Analysis of Simulation Nuclear Fuel Loaded in the HANARO Flow Simulation Test Facility (하나로 유동모의 시험장치에 설치되는 모의 핵연료 유동해석)

  • Park Yong-Chul;Cho Yeong-Garp;Wu Jong-Sub
    • Proceedings of the KSME Conference
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    • 2002.08a
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    • pp.43-46
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    • 2002
  • The HANARO, multi-purpose research reactor, 30 MWth open-tank-in-pool type, is under 24 MWth of power operation since it reached to the initial critical in February, 1995. Many useful experiments should be safely performed to activate the utilization of the HANARO, but there is a radioactive risk of using the HANARO. To reduce the risk, a test facility, which is not reacted by nuclear fuel, is being developed to simulate similar flow characteristics with the HANARO. This paper describes the computational flow analysis to determine each shape of simulating fuels for simulating the flow similarities of 36 elements hexagonal fuels assembly and 18 elements circulating fuels assembly loaded in HANARO. The shares of orifices were determined by the trial and error method and the structural integrities of them were verified by the finite element method assuming that the flow rate and pressure differences of reactor core are constant. The analysis results will be verified with the results of the flow test to be performed after the installation of this test facility.

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Case Study of Design and Implementation for Hadoop-Based Integrated Facility Monitoring System (하둡 기반의 통합설비 모니터링시스템 설계 및 구현 사례 연구)

  • Kim, Sangrak;Jang, Gilsang;Cho, Chiwoon
    • Journal of Korean Institute of Industrial Engineers
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    • v.40 no.1
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    • pp.34-42
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    • 2014
  • SCADA and DCS that have performed automatic control and monitoring activities increase the productivity of enterprise in industries. In such systems, although their performance had been improved, there are still many deficiencies in predictive maintenance which can foresee the risk of any kinds of accidents. Because the data acquisition systems of main facilities are being distributed throughout the whole plant and therefore, integration of data obtained from the systems is very difficult. Accordingly, techniques that acquire meaningful information from the gathered data through realtime analysis still need to be improved. This paper introduces a developed facility monitoring system which can predict equipment failure and diagnose facility status through big data analysis to improve equipment efficiency and prevent safety accidents.

Analysis of Marine Vessel Collision Risk based on Quantitative Risk Assessment

  • Koo, Bon Guk
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.24 no.3
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    • pp.319-324
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    • 2018
  • The collision problem is one of the design factors that must be carefully considered for the risk of collision occurring during the operation of ships and offshore structures. This paper presents the main results of the ship collision study, and its main goal is to analyze potential crash scenarios that may occur in the FLNG (Floating Liquefied Natural Gas) considering the likelihood and outcome. Consideration being given to vessels visiting the FLNG and surrounding vessels navigating around, such as functionally supported vessels and offloading carriers. The scope includes vessels visiting the FLNG facility such as in-field support vessels and off-loading carriers, as well as third party passing vessels. In this study, based on QRA (quantitative risk assessment), basic research methods and information on collision are provided. Based on the assumptions and methodologies documented in this study, it has been possible to clarify the frequency of collision and the damage category according to the type of visiting ship. Based on these results, the risk assessment results related to the collision have been derived.

A Comparative Study on the Risk(Individual and Societal) Assessment for Surrounding Areas of Chemical Processes (화학공정 주변지역에 미치는 위험성(사회적 위험성 및 개인적 위험성) 평가방법에 관한 비교 연구)

  • 김윤화;엄성인;고재욱
    • Journal of the Korean Society of Safety
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    • v.10 no.1
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    • pp.56-63
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    • 1995
  • Two methods of the numerical method of CPQRA(Chemical Process Quantitative Risk Analysis) and the manual method of IAEA(International Atomic Energy Agency) were used to estimate the individual risk and societal risk around the chemical plant. Where, the CPQRA is introduced to verify the theoritical background of the manual of international atomic energy agency. The Gaussian plume model which has a weather stability class D with velocity of 5m/s was applied to calculate dispersion of hazard material. Also, 8-point method was employed to the effects of accidents for wind distribution. Furthermore, historical record, FTA(Fault Tree Analysis) and ETA(Event Tree Analysis) were used to estimate the probability or frequency of accidents. Eventually, the individual risk shows isorisk contour and the societal risk shows F-N curve around hazard facility, especially in chemical plants. Caulculated results, which both individual and societal risk, by using IAEA manual show simillar results to those of calculation by numerical method of CPQRA.

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IDENTIFICATION OF SAFETY CONTROLS FOR ENGINEERING-SCALE PYROPROCESS FACILITY

  • MOON, SEONG-IN;SEO, SEOK-JUN;CHONG, WON-MYUNG;YOU, GIL-SUNG;KU, JEONG-HOE;KIM, HO-DONG
    • Nuclear Engineering and Technology
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    • v.47 no.7
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    • pp.915-923
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    • 2015
  • Pyroprocess technology has been considered as a fuel cycle option to solve the spent fuel accumulation problems in Korea. The Korea Atomic Energy Research Institute, Daejeon, Korea has been studying pyroprocess technology, and the conceptual design of an engineering-scale pyroprocess facility, called the Reference Engineering-scale Pyroprocess Facility, has been performed on the basis of a 10 ton heavy metal throughput per year. In this paper the concept of Reference Engineering-scale Pyroprocess Facility is introduced along with its safety requirements for the protection of facility workers, collocated workers, the off-site public, and the environment. For the identification of safety structures, systems, and components and/or administrative controls, the following activities were conducted: (1) identifying hazards associated with operations; (2) identifying potential events associated with these hazards; and (3) identifying the potential preventive and/or mitigative controls that reduce the risk associated with these accident events. This study will be used to perform a safety evaluation for accidents involving any of the hazards identified, and to establish safety design policies and propose a more definite safety design.

Variants of Inflammnation-related Genes and the Risk of Gallstones and Biliary Tract Cancer: A population-baged Study in China

  • Hsing, Ann W.;Sakoda, Lori;Chen, Jin-Bo;Rashid, Asif;Wang, Bin-Shen;Shen, Ming-Chang;Chen, Eric;Rosenberg, Phillip;Zhang, Mingdong;Andreotti, Gabriella;Welch, Robert;Yeager, Meredith;Fraumeni Jr. Joseph F.;Gao, Yu-Tang;Stephen J. Chanock
    • Proceedings of the Korean Society of Toxicology Conference
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    • 2006.11a
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    • pp.32-33
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    • 2006
  • There is compelling evidence that chronic inflammation predisposes to biliary tract cancer. Previously we found that aspirin use and variants in the PTGS2 gene, both of which are closely linked to inflammation, were associated with biliary tract cancer risk in a population-based study in China. To test the inflammation hypothesis further, we examined the associations of variants in 20 genes involved in the inflammation pathway with risk of biliary tract cancer and stones in a large population-based case-control study in Shanghai, China. We genotyped 56 single nucleotide polymorphisms (SNPs)from 20 inflammation genes in 411 biliary tract cancer cases (237 gallbladder cancers, 127 extrahepatic bile duct cancers, and 47 ampullary cancers), 895 subjects with biliary stones, and 786 population controls. Unconditional logistic regression was used to calculate odds ratios (ORs) and 95% confidence intervals (Cls) for the association of individual SNPs and haplotypes with biliary stones and biliary tract cancer risk. Of the 56 SNPs examined, 20 showed some associations with biliary cancer and stones. Specifically, variants of the IL8, IL8RB, RNASEL, TGF-beta, and TNF-alpha genes were associated with gallstone risk, while variants in the IL1A, IL10, VEGF, and RNASEL genes were associated with gallbladder cancer risk. Adjustment for multiple comparisons did not materially change these results. Of the 10 genes with multiple SNPs, we inferred halotypes; only one haplotype in the IL8RBgene was associated with gallstones. The haplotype frequency was significantly different between bile dict cancer cases and control (p=0.007). A haplotype comprising 3 SNPs in the IL8RB gene (rs2230054, rs1126579, rs1126580) was associated with a 54% increased risk of bile duct stones (95% CI 1.14-2.07, p=0.02), relative to the most frequent haplotype. In summary, common variants in immune-related genes influencing inflammatory responeses were associated with gallstones and biliary tract cancer, lending further support to the role of inflammation in the pathogenesis of biliary stones and biliary tract cancer. Future larger studies with more complete gene coverage are needed to confirm these results.

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