• 해양환경안전학회지
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• 제22권3호
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• pp.259-267
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• 2016

The study performs a risk analysis on container ship accidents using accident data collected over the six years from 2006 to 2011, presents the resulting risk level, and suggests three risk mitigation measures to reduce the overall risk, for the safer operation of container ships. More specifically, starting from the initial accident of collision, we developed 13 different accident scenarios using event tree analysis based on which the overall risk level was obtained and presented as a FN curve. Since diverse human factors are the main cause of most of the ship accidents, our study focuses on the effect of reducing human causes on the resulting risk level. For the research we considered the injuries for the calculation of fatality with the help of MAIS. The results show that collision was the main type of accident, accounting for 62 % of all accidents, and the measures employed were proven to be effective in the sense that the risk level was much lowered and the average number of fatalities was also reduced. With more data accumulated, more precise risk level will be calculated with which the practical risk mitigating measures will be also developed. For future study, economic loss and environmental damage as consequences need to be considered.

• 한국환경보건학회지
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• 제47권2호
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• pp.155-165
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• 2021

Objectives: Acute exposure to high concentrations of chemicals can occur when a chemical accident takes place. As such exposure can cause ongoing environmental pollution, such as in the soil and groundwater, there is a need for a tool that can assess health effects in the long term. The purpose of this study was assessing the health risks of residents living near a chemical accident site due to long-term exposure while considering the temporal concentration changes of the toxic chemicals leaked during the accident until their extinction in the environment using a multimedia environmental dynamics model. Methods: A health risk assessment was conducted on three cases of formaldehyde chemical accidents. In this study, health risk assessment was performed using a multimedia environmental dynamics model that considers the behavior of the atmosphere, soil, and water. In addition, the extinction period of formaldehyde in the environment was regarded as extinction in the environment when the concentration in the air and soil fell below the background concentration prior to the accident. The subjects of health risk assessment were classified into four groups according to age: 0-9 years old, 10-18 years old, 19-64 years old, and over 65 years old. Carcinogenic risk assessment by respiratory exposure and non-carcinogenic risk assessment by soil intake were conducted as well. Results: In the assessment of carcinogenic risk due to respiratory exposure, the excess carcinogenic risk did not exceed 1.0×10-6 in all three chemical accidents, so there was no health effect due to the formaldehyde chemical accident. As a result of the evaluation of non-carcinogenic risk due to soil intake, none of the three chemical accidents had a risk index of 1, so there was no health effect. For all three chemical accidents, the excess cancer risk and hazard index were the highest in the age group 0-9. Next, 10-18 years old, 65 years old or older, and 19-64 years old showed the highest risk. Conclusion: This study considers environmental changes after a chemical accident occurs and until the substance disappears from the environment. It also conducts a health risk assessment by reflecting the characteristics of the long-term persistence and concentration change over time. It is thought that it is of significance as a health risk assessment study reflecting the exposure characteristics of the accident substance for an actual chemical accident.

• 대한조선학회논문집
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• 제58권2호
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• pp.97-104
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• 2021

Together with the emerging of the Eco-ship, the application of large-diameter and high-efficiency propeller required more careful attention than before in the design of the shafting system. After the adoption of Environmentally Acceptable Lubricants (EAL) to the stern tube lubrication oil, a number of aft stern tube bearing accidents have been reported, and a variety of institutions have actively conducted research on the cause relationship. This study attempted to find the cause of the accident by measuring the alignment of the shafting system of a medium-sized product/chemical tanker with aft stern tube bearing damage and analyzing the reaction force of each bearing. In addition, a reasonable solution to the correction of the shaft alignment was suggested and the feasibility was reviewed. Through various measured data and analysis, the actual installation of shafting system was slightly different from the design drawing condition, but it was found that each bearing load distribution was within the allowable range. Therefore, it was confirmed that the cause of this accident was due to the dissatisfaction the misalignment slope of aft stern tube bearing rather than the effect of the bearing overload. As a solution to this cause, countermeasures such as double slope were suggested in the aft stern tube bearing, and the characteristics of EAL also seem to have an indirect effect.

• 한국안전학회지
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• 제31권3호
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• pp.60-67
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• 2016

The gas leak and explosion accident is able to give a fatal injury to nearby people from the explosion center and interest in effect of the explosion on the human body is increased. Accidents by Portable Butane Gas Range of a gas explosion accident occupy the most share. As a result, the injury on the human body frequently occur. However, It is situation that are experiencing difficulties in consequence analysis of explosion accidents owing to shortage of explosion power data and lack of research on the effect of the human body by the gas explosion. This paper acquire human injury data by performing the actual explosion experiment with Portable Butane Gas Range and evaluate power by explosion and effect of explosion on the human body to perform explosion simulation with LS-DYNA program. It is intended to contribute to the exact cause of the accident investigation and the same type of accident prevention.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 1997년도 International Symposium on Fire Science and Technology
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• pp.252-259
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• 1997

A method to automate hazard analysis of chemical plants is proposed in this paper. The proposed system is composed of three knowledge bases - unit knowledge base, organizational knowledge base and material knowledge base, and three hazard analysis algorithms - deviation, malfunction and accident analysis algorithm. Hazard analysis inference procedure is developed based on the actual hazard analysis procedures and accident development sequence. The proposed algorithm can perform hazard analysis in two methods and represent all conceivable types of accidents using accident analysis algorithm. In addition, it provides intermediate steps in the accident propagation, and enables the analysis result to give a useful information to hazard assessment. The proposed method is successfully demonstrated by being applied to diammonium phosphate manufacturing process. A system to automate hazard analysis is developed by using the suggested method. The developed system is expected to be useful in finding the propagation path of a fault or the cause of a malfunction as it is capable to approach causes of faults and malfunctions simultaneously.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2008년도 춘계학술발표회
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• pp.249-255
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• 2008

2007년 12월 7일 태안앞바다에서 발생한 Hebei Spirit호와 크레인바지선 삼성 1호의 충돌사고로 인한 대형오염사고의 발생단계에서 대응하는 전 과정을 통해 많은 문제점이 지적되었다. 이에 따라 저자는 이번 오염사고를 오염방지 측면에서 그 원인을 집중적으로 분석하여 개선책, 즉 예인선의 예인시의 출항통제 및 항해검사 기준 강화, VTS 서비스 확충 및 관리책임부서를 해양경찰청으로의 이관, 적합한 정박지 지정 및 선종별, 화물별, 목적별로 분리하여 정박지 관리, 위험물운반선의 특별관리시스템 도입 등을 제시함으로써 추후 오염사고의 방지에 도움을 주고자 하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2022년도 추계학술대회
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• pp.229-230
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• 2022

미래환경에 부합하는 스마트 항로표지는 다양한 정보를 생성하고, 다양한 방식으로 제공될 것이다. 해양 이용자에게 적절한 서비스제공을 위해 관리자는 언제든지 항로표지를 확인하고, 원하는 형식으로 자료를 확인할 수 있어야 한다. 또한 미래의 항로표지가 적절히 관리되기 위해서는 항로표지사고의 원인을 파악하고, 재발 방지를 위해 노력해야 할 것이다. 이를 본 연구에서는 항로표지사고에 대하여 원인 7종과 사고종류를 11종으로 구분하여 제시하였다.

• 한국화재조사학회논문지
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• 제11권1호
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• pp.1-8
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• 2008

가스연료는 사업체, 가정 등에서 사용이 증가하고 있으며, 이로 인한 사고위험도도 증가추세 이며, 사고원인 또한 다양하게 나타나고 있다. 가스사고를 원인(취급부주의, 제품불량 등), 형태(화재, 폭발, 누출 등), 피해등급(1,2,3,4급), 사상자(사망, 중상, 경상)로 분류하여 설명하였다. 가스연료 중 가정에서 많이 사용되는 LP가스 시설은 가스용기, 압력조정기, 호스, 중간밸브, 연소기로 크게 구분할 수 있으며, 이 구성요소 중의 어떤 부분에서 취급부주의, 제품불량 등의 원인에 의해 화재 및 폭발 등이 발생할 수 있다. 따라서 사고 발생시 과거화재사례에 대한 연구 및 화재조사 시 착안사항을 참고하여 정확한 원인이 규명되어야 한다.

• 한국전자통신학회논문지
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• 제11권8호
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• pp.783-792
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• 2016

본 논문은 교차로 영상기록장치 시스템으로서 교차로 구간 영상과 신호등 현시 영상을 수집하여 하나의 영상정보로 통합한 후 중앙센터로 전송하는 시스템이다. 시스템은 교차로 영상과 신호등 현시 영상을 획득하는 영상 획득 과정과 획득한 두 영상을 단일의 영상으로 통합하는 과정을 거쳐 중앙센터로 전송하고 기록하도록 구성되어 있다. 이 시스템을 활용하여 사고 발생시 유고정보를 신속히 전파하여 2차 사고를 예방하고 사고의 원인을 판단하는데 소요되는 시간과 분쟁을 줄일 수 있을 것으로 기대된다.

• 한국전자통신학회논문지
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• 제12권6호
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• pp.1189-1196
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• 2017

본 연구의 목적은 교차로 신호등 영상과 신호현시 영상을 하나의 영상정보로 통합 하여 중앙센터로 전송하는 방식이다. 시스템은 교차로 영상과 신호현시 영상을 수집하여 하나의 영상으로 통합하여 중앙센터에 전송 저장한다. 이 시스템은 사고발생시 사고정보를 즉시 전파하고 사고 원인을 규명하고 분쟁을 해결하는데 소요되는 시간을 줄임으로써 2차 사고를 예방하는데 효과적 일 것으로 예상된다.