• 한국안전학회지
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• 제38권3호
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• pp.110-120
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• 2023

Following the Fukushima accident, portable equipment employed as accident mitigating systems have been installed and operated to reduce core damage and large early release frequencies. In addition, the establishment of an accident management strategy has gained importance. This study investigated the current status of portable equipment including the international portable equipment FLEX (diverse and flexible coping strategies), and domestic portable equipment multi-barrier accident coping strategy (MACST). Research on optimal utilization of MACST remains insufficient. As a preliminary study for establishing an optimal strategy, sensitivity studies were conducted to facilitate the priority of use on portable equipment, number of portable equipment, and dependency of operator actions based on a multi-unit probabilistic safety assessment model. The results revealed the conditions that reduced the multi-unit and site conditional core damage probabilities, indicating the optimal strategy of MACST. The results of this study can be used as a reference for establishing an optimal strategy that utilizes domestic safety equipment in the future.

• 한국안전학회지
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• 제27권2호
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• pp.72-77
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• 2012

There are insufficient models that find problems and solutions for accident prevention through risk assessment and suggest safe work process and work instruction from foundation works to finish work for accident decrease. This paper presents a quantitative risk assessment model by analysis of risk factors in each process such as earth works, drainage works, pavement works, appurtenant works and etc based on accident examples and investigation on actual condition in roads construction work. In addition, the safety management system was developed to perform risk assessment of construction and use it for effective safety training for labor.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2007년도 정기총회 및 학술발표대회
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• pp.376-379
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• 2007

In recent years, the natural damage associated with flood disaster has been dramatically increased. However, there is no rational method which reflects urban characteristics to estimate the regional safety assessment for flood disaster. The purpose of this study is to develop the regional safety assesment model for urban flood. Flood risk and reduction assesment were estimated by using the linear sum of the Z score of the assessment factors and the weight value of each factor from the expert survey data. And then the regional safety assessment was estimated by subtracting reduction factor value from risk factor value. GIS tool was used to estimate the factor assesment and integrated regional safety. This study can be used to determine the priority of flood protection project, execute the flood insurance and establish the urban plans and the flood mitigate plan.

• Nuclear Engineering and Technology
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• 제50권8호
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• pp.1210-1216
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• 2018

Site or multi-unit (MU) risk assessment has been a major issue in the field of nuclear safety study since the Fukushima accident in 2011. There have been few methods or experiences for MU risk assessment because the Fukushima accident was the first real MU accident and before the accident, there was little expectation of the possibility that an MU accident will occur. In addition to the lack of experience of MU risk assessment, since an MU nuclear power plant site is usually very complex to analyze as a whole, it was considered that a systematic method such as probabilistic safety assessment (PSA) is difficult to apply to MU risk assessment. This paper proposes a new MU risk assessment methodology by using the conventional PSA methodology which is widely used in nuclear power plant risk assessment. The logical failure structure of a site with multiple units is suggested from the definition of site risk, and a decomposition method is applied to identify specific MU failure scenarios.

• 한국건설관리학회논문집
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• 제8권2호
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• pp.68-74
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• 2007

지금까지 건설재해를 예방하기 위한 건설공사의 안전관리는 시공단계에서만 활발히 수행되어 왔다. 하지만 사망재해의 15%가 작업자 안전에 부정적인 영향을 미치는 부적절한 설계에 의해 발생하였다는 점을 감안할 때, 설계(안)에 존재하는 안전 위험성을 조기에 발굴 및 평가하여 제거 및 최소할 필요가 있다. 본 연구는 '안전을 위한 설계(Design for Safety)' 개념을 활용하여 설계(안)에 존재하는 안전 위험요소를 발굴 및 평가할 수 있는 체크리스트의 개발을 목적으로 하고 있다 이를 위해 영국 산업안전보건청(Health and Safety Executives)에서 활용하고 있는 설계단계 안전 위험성 평가 체크리스트의 구조, 활용절차 및 문제점에 관한 문헌연구를 수행하였다. 이를 통해 공간, 부위 및 공종별 안전 위험요소와 원인의 분류, 안전수준의 정량적 평가, 안전위험요소의 제거 및 최소화를 위한 안전설계지침 및 관련 안전기준을 반영한 새로운 안전 위험성 평가 체크리스트를 제안하였다. 설계단계 안전 위험성 평가 체크리스트는 건축공사 전반에서 발생할 수 있는 재해를 조기 예방하는데 있어 유용한 도구로 사용될 수 있다.

• 한국산학기술학회논문지
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• 제21권10호
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• pp.40-47
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• 2020

화재예방 및 신속대응을 위한 다양한 기술, 시스템 및 법제도가 도입되고 있지만 매년 화재로 인한 인명 및 재산피해는 줄지 않고 있다. 화재로 인한 재난을 관리하기 위해서는 공간정보 기반의 안전상태지도의 개발이 필요하며, 각 위치정보에 대한 속성정보의 적합성을 확보하는 것이 필요하다. 안전상태지도는 목적에 맞는 안전상태 평가의 평가항목을 도출하고, 지수화 한 후, 다양한 방법으로 조사한 결과를 위치정보에 정합시켜서 제작된다. 본 논문에서는 3D 안전상태지도 제작을 위한 건물 화재안전 평가항목을 도출한다. 우선, 국내외 안전평가 모델의 평가항목을 조사하여 한국 3D 안전상태지도로의 적용성을 분석한다. 다음으로 화재안전 평가모델의 평가항목을 도출한다. 평가항목은 정보수집 활동에 따라 '건물의 기본정보를 통하여 평가가 가능한 항목'과 '현장조사를 통하여 평가가 가능한 항목'으로 구별되어 도출된다. 항목 도출 결과, 다섯 개 카테고리(업종위험, 건물 안정성, 소방 설비 시설, 화재위험성, 화재대응상태)에 걸쳐 총 14개의 평가항목을 도출하였다.

• 한국안전학회지
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• 제28권2호
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• pp.60-65
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• 2013

On the basis of the guideline "2012-104(2012.9.26.)" notified by the ministry of employment and labor, this paper provided the baseline data and the improvement proposal in applying risk assessment to a construction site by group interview & survey of construction workers. The worker's awareness and action plan of safety and health were investigated by numerical analysis. From the result of group interview and the survey of construction workers, it was found that most of construction workers feel the danger during the work. The results also shows that risk assessment can help to change & raise the awareness of safety and to reduce the industrial disaster. In addition, simple safety management activity such as TBM & active education of safety will be necessary for safe workspace and the active TBT(tool box talk) which combines TBM & the education of safety will be also effective.

• 한국안전학회지
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• 제24권6호
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• pp.144-149
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• 2009

The safety assessment for facility industry is now being periodically performed in Korea. 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. The necessary reliability data for QRA have been generally announced the values in other process industries, which results in the drop of risk reliability. The most appropriate method is to perform a direct reliability analysis towards the facilities undergoing safety assessment. In this study, the distinction between homogeneous sample estimation and multi-sample estimation of reliability data clarify using 2-Bayes theory.

• 대한안전경영과학회지
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• 제13권4호
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• pp.61-69
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• 2011

The hazard conditions on plant works of the steel industry have been investigated to efficiently prevent from industrial accidents. The plant works are eventually carried out by workers of smaller service companies where the safety management systems are not well established, on behalf of the main steel company. Based on the preliminary risk assessment on the plant working and open literature reviews, the safety management systems, which can be applied to the plant workplace of each process, are studied and then the step-by-step 4M check-list method is established. Accordingly, the risk assessment technique using 4M checklist for the plant workplace is proposed. In addition, a standardized flow-chart for safety management of plant work is introduced. These risk assessment technique and flow-chart can definitely contribute to the reduction of industrial accidents, considering the risk characterization and the unsafe conditions in small and medium-sized plant workplace, as effective safety management tools and safety guide line.

• 한국안전학회지
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• 제37권2호
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• pp.76-87
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• 2022

Lithium-ion batteries (LIBs) have attracted much interest for their high energy density (>150 mAh/g), high capacity, low self-discharge rate, and high coulombic efficiency. However, with the successful commercialization of LIBs, fire and explosion incidents are likely to increase. The thermal runaway is known as the major factor in battery-related accidents that can lead to a series of critical conditions. Considering this, recent studies have shown an increased interest in countering the safety issues associated with LIBs. Although safety standards for LIB use have recently been formulated, little attention has been paid to the safety around the manufacturing process for battery products. The present study introduces a risk assessment method suitable for assessing the safety of the LIB-manufacturing process. In the assessment method, a compensation parameter (Z-factor) is employed to correctly evaluate the process's safety on the basis of the type of material (e.g., metal anode, liquid electrolyte, solid-state electrolytes) utilized in a cell. The proposed method has been applied to an 18650 cell-manufacturing process, and three sub-processes have been identified as possibly vulnerable parts (risk index: >4). This study offers some crucial insights into the establishment of safety standards for battery-manufacturing processes.