• Journal of the Korean Institute of Gas
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• v.9 no.4 s.29
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• pp.44-49
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• 2005

In this study, a process safety evaluation is implemented, in which the process hazards are investigated systematically about hydrogen production plants. Be used qualitative Safety management method such as HAZOP and FMEA. Were analysed potential hazards (human errors or operating failures of every processing steps) about parameters that flow, pressure, temperature of hydrogen production plants through HAZOP that making deviations applied signified guide words. Analysed to using FMEA mainly about bad components or troubles that equipments breakdown and malfunction in facilities and then propose its influences, and counterproposal.

• Journal of Energy Engineering
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• v.26 no.4
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• pp.23-28
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• 2017

Hazard evaluation and FTA are performed as the first and the second step of QRA for a LNG storage tank. Hazards are identified using HAZOP. Each segment of the system is examined, and we list all possible deviations from normal operating conditions and how they might occur. The consequences on the process are assessed, and the means available to detect and correct the deviations are reviewed. The FTA is carried out to analyse the hazards identified from the HAZOP study. A top event is selected to be release of LNG. Then all combinations of individual failures that can lead to the hazardous event are shown in the logical format of the fault tree system.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2002.05a
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• pp.317-322
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• 2002

위험성 편가의 목적은 현재의 위험 상태를 평가하고 이들 위험이 허용가능한가를 평가하여 시스템의 개선과 위험을 감소시기는 데 있다. 기업에서 모든 위험을 Zero화 시킨다는 것은 현실적으로 어렵기 때문에 사업장에서 발생할 수 있는 모든 이탈 상태를 파악하고, 안전경영의 우선순위를 정하여 운영해야 한다. 이에 필요한 것이 위험성 평가이며 위험성 평가의 필수적인 요소는 정량화를 통하여 허용가능성 여부를 판단하는 것에 있다.(중략)

• Journal of the Korean Institute of Gas
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• v.27 no.4
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• pp.92-101
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• 2023

To solve the problem of climate change, carbon neutrality has now become a necessity rather than an option. Hydrogen is not only a energy storage that can supplement the intermittent production of renewable energy, but is also considered a good alternative in the field of utilization as it does not emit carbon dioxide after reaction. In order to revitalize hydrogen vehicles, one of the fields of hydrogen utilization, the construction of hydrogen station infrastructure must be preceded. Prioritization of risk factors is necessary for efficient operation and risk assessment of hydrogen stations, but due to the short operation period of domestic hydrogen stations, there is a lack of frequency data on accidents and their reliability is low. In this study, we aim to identify the causes and consequences of deviations in hydrogen stations through HAZOP analysis. Additionally, we intend to analyze them using Fuzzy-AHP. Through this, we intend to derive the decision values for the causes of deviations in hydrogen stations and apply them to hydrogen accident cases and risk assessments to confirm the reliability and utility of the data.

• Journal of the Korean Society of Safety
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• v.28 no.3
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• pp.88-94
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• 2013

In university laboratories, areas of studies are becoming diverse and complicated according to the development of the industry. New forms of potential risk factors are increasing and they are unlike existing ones. In addition, many students are conducting various experiments in the laboratory. Therefore, they could be exposed to risk more often. Despite these risks, people do not recognize university lab safety activities properly and observe safety precautions. They are exposed to various laboratory accidents continually. In this study, we do not apply the present diagnosis method, checklist, but the safety assessment that is widely used in industry. Then we can find lots of hazard that checklist method could miss. This study will use the 4M and Hazard & Operability to design a new Laboratory safety assessments method.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.10
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• pp.89-100
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• 2018

The precedent study stage of defense programs is a project stage that is conducted to support the determination of an efficient acquisition method of the weapon system determined by the requirement. In this study, the FTA/FMEA technique was used in the safety analysis process to identify elements to be conducted in the precedent study stage and a methodology for deriving the key review elements through conceptualization and tailoring was suggested. To supplement the key elements derived from the existing research, it is necessary to analyze various events that may arise from key elements. To accomplish this, the HAZOP technique for safety analysis in other industrial fields was used to supplement the results of kdy element derivation. We analyzed and modeled the execution procedure by establishing input/output information and association with the key elements of the precedent study stage derived by linking HAZOP/FTA/FMEA techniques. In addition, performance maturity was evaluated for performance of precedent study, and a risk-based response manual was generated based on inter-working information with key elements with low maturity. Based on the results of this study, it is possible to meet the performance, cost, and schedule of the project implementation through application of the key elements and procedures and the risk management response manual in the precedent study stage of the defense program.

• Journal of the Korean Society of Marine Environment & Safety
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• v.29 no.2
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• pp.238-247
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• 2023

Liquefied petroleum gas (LPG) is an attractive fuel for ships considering its current technology and economic viability. However, safety guidelines for LPG-fueled ships are still under development, and there have been no cases of applying LPG propulsion systems to small and medium-sized ships in Korea. The purpose of this study was to perform an objective risk assessment for the first marine LPG engine system and propose safe operational standards. First, hazard and operability (HAZOP) analysis was used to divide the engine system into five nodes, and 58 hazards were identified. To compensate for the subjectivity of qualitative evaluation using HAZOP analysis, fuzzy set theory was used, and additional risk factors, such as detectability and sensitivity, were included to compare the relative weights of the risk factors using a fuzzy analytical hierarchy process. As a result, among the five risk factors, those with a major impact on risk were determined to be the frequency and severity. Finally, the fuzzy technique for order of preference by similarity to ideal solution (TOPSIS) was applied to select the risk rank more precisely by considering the weights of the risk factors. The risk level was divided into 47 groups, and the major hazard during the operation of the engine system was found through the analysis to be gas leakage during maintenance of the LPG supply line. The technique proposed can be applied to various facilities, such as LPG supply systems, and can be utilized as a standard procedure for risk assessment in developing safety standards for LPG-powered ships.

• Journal of the Korean Society of Safety
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• v.27 no.5
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• pp.55-63
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• 2012

The purpose of this study is to suggest new safety code to improve the safety of the flare safety system. Firstly, we analyzed the major accidents occurred at the flare system since 1996 and proposed 3 articles which is required to be added newly to the existing KOSHA code. Secondly, we also performed the HAZOP study for each study node and also suggested 5 articles. Finally, we analyzed the commented contents of PSM reports which have been submitted from the enterprise located in Honam province since 2005 and proposed 5 articles as well. We understand that all 13 articles proposed above, should be added to the KOSHA code in order to improve the safety in the flare system and to prevent the major fire and explosion accidents in the design stage.

• Journal of the Korean Society of Safety
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• v.27 no.6
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• pp.64-69
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• 2012

The purpose of this study is to suggest new safety technical standards to improve the safety in the incineration process. Firstly, we analyzed the major accidents occurred in the incineration process since 1996 and proposed 4 articles which is required to be added newly to the existing KOSHA GUIDE. Secondly, we also performed the HAZOP study for each study node and also suggested 3 articles. Finally, we analyzed recommendations commented for PSM reports which have been submitted from the enterprise located in Honam province since 2005 and proposed 2 articles as well. We understand that all 9 articles proposed above, should be added to the KOSHA GUIDE in order to improve the safety in the incineration process and to prevent the major fire and explosion accidents in the design stage.

• Journal of the Korean Society of Safety
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• v.18 no.4
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• pp.148-154
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• 2003

There are now the plating process that have many hazardous factor cause of the using numerous noxious chemical and bad working environments. The purpose of the study is to make a selection of suitable safety evaluation method that can analyze and righteously find with numerous hazardous factor of the plating process. And another purpose is to systematically adjust the risk of plating process by comprehension of the role of process, equipment, and source material. Therefore, these studies are carried out in the following three investigations of this report. The first research understands the injurious human health and environment by analyzing hazardous material based on the MSDS. To evaluate the safety of process and compartment, the second research is proposed the security secure counterproposal by using the FMEA and the HAZOP. The final research is devoted to systematically analyze the hazard by applying for reasonable guide word and doing the HAZOP for hazardous factor in specific process.