• Journal of the Korean Society of Safety
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• v.12 no.4
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• pp.21-26
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• 1997

Korea Atomic Energy Research Institute (KAERI) developed a risk monitor called Risk Monster which supports for plant operators and maintenance schedulers to monitor plant risk and to avoid high peak risk by rearranging maintenance work schedule. Risk Monster can update the plant risk continuously according to the change of system/component configuration since Risk Monster reevaluates the plant risk based on the Probabilistic Safety Assessment (PSA) results. A brief description of Risk Monster is provided. The PSA model of UCN 3, 4 nuclear power plant was converted by KAERI to Risk Monster model. Using this Risk Monster model, a feasibility study of the on-line maintenance of an Essential Service Water (ESW) pump was performed. On-line maintenance of one ESW pump has been shown to be acceptably safe, and has economic benefits. In addition, it is not a violation of technical specification to continue plant operation with an out-of-service ESW pump.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.05b
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• pp.713-718
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• 1996

Risk Monster는 한국원자력연구소에서 개발한 risk monitor로서 발전운영시 및 정비계획시 원전의 기기 운영 상태 (=Configuration)의 실제 변경이나 계획시 이에 따른 원전의 안전성 (또는 Risk)를 평가 및 감시하는 시스템이다. 안전성은 노심손상 빈도를 가지고 평가하며 이 Risk Monster의 국내 원전에의 활용, 특히 on-line maintenance시의 활용을 모색하였다. 외국에서처럼 국내 원전에서도 risk monitor를 이용한 on-line maintenance를 실시 하여 원전의 경제성 및 안전성을 향상 시켜야 한다.

• Nuclear Engineering and Technology
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• v.53 no.1
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• pp.103-110
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• 2021

In the development of a Risk Monitor probabilistic safety assessment (PSA) model from the basic PSA model of a nuclear power plant, the modeling of common-cause failure (CCF) is very important. At present, some approximate modeling methods are widely used, but there lacks criterion of modeling accuracy and error analysis. In this paper, aiming at ensuring the accuracy of risk assessment and minimizing the Risk Monitor PSA models size, we present three basic issues of CCF model resulted from the changes of a nuclear power plant configuration, put forward corresponding modeling methods, and derive accuracy criteria of CCF modeling based on minimum cut sets and risk indicators according to the requirements of risk monitoring. Finally, a nuclear power plant Risk Monitor PSA model is taken as an example to demonstrate the effectiveness of the proposed modeling method and accuracy criteria, and the application scope of the idea of this paper is also discussed.

• Transactions of the Korean Society of Pressure Vessels and Piping
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• v.10 no.1
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• pp.37-43
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• 2014

Nuclear power plants(NPPs) are consisted of power production functions and safety functions preventing leakage of radiation. Operators working in NPPs shall maintain these functions during an operation period through various activities such as improvement & modification, corrective maintenance, preventive maintenance and surveillance test. According to the performance of these work activities, there are configuration changes in NPPs systems. Its changes cause the increase of safety risks(CDF) and plant trip risks. Recently, the importance of risk management is increasing gradually in the operation process of NPPs. Therefore, this paper presents the work management methods using the various risk monitoring systems during power operation and overhaul period. Also this paper suggests the optimum application ways of risk systems for work management.

• Proceedings of KOSOMES biannual meeting
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• 1999.03a
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• pp.43-51
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• 1999

The objective of this research is to ensure that the ports and waterways management system can establish and maintain a reasonable level of safety level during high density passenger operations. The research model was developed included computer based model that could be used that can be used to measure and monitor risk and evolved overtime. The research methodology provides model for assessing relative risk and evaluating risk reduction measures. The risk analysis based on expert judgement was refined overtime. They provide a basis for risk reduction and risk management policies and strategies. The evaluation and validation of risk model and development of data, methods, tools required to measure, monitor and evaluate ports and waterway risk was implemented.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.05a
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• pp.606-610
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• 1997

울진 원전 3,4 호기 확률론적 안전성 평가 (PSA) 모델을 risk monitor 모델로 변환하여 한국원자력연구소에서 개발한 risk monitor인 Risk Monster[1]에 설치하였으며 이를 이용하여 필수냉각수 계통(ESW;Essential Service Water) 펌프의 가동중 정비(on-line maintenance)의 가능성 여부를 연구하였다. ESW 펌프를 가동중 정비하더라도 안전성 측면에서 별 문제가 없으며 경제성 여부는 보다 정확한 검토가 요구되나 상당히 있는 것으로 판단된다. 한편 ESW펌프 한대의 고장이 원전 가동중에 미치는 위험도를 분석하였으며 그 결과 ESW펌프 한대의 고장에도 불구하고 원전 계속 가동에는 큰 문제가 없었다.

• Safety and Health at Work
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• v.9 no.1
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• pp.30-41
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• 2018

Background: The purpose of the work is to develop a system that allows processing of information for analysis and industrial risk management, to monitor the level of industrial safety and to perform necessary measures aimed at the prevention of accidents, casualties, and development of professional diseases for effective management of industrial safety at hazardous industrial sites. Methods: Risk assessment of accidents and incidents is based on expert evaluations. Based on the lists of criteria parameters and their possible values, provided by the experts, a unified information and analytical database is compiled, which is included in the final interrogation questionnaires. Risk assessment of industrial injuries and occupational diseases is based on statistical methods. Results: The result of the research is the creation of Guidelines for risk management on hazardous industrial sites of the Republic of Kazakhstan. The Guidelines determine the directions and methods of complex assessment of the state of industrial safety and labor protection and they could be applied as methodological basis at the development of preventive measures for emergencies, casualties, and incidents at hazardous industrial sites. Conclusion: Implementation of the information-analytical system of risk level assessment allows to analyze the state of risk of a possible accident at industrial sites, make valid management decisions aimed at the prevention of emergencies, and monitor the effectiveness of accident prevention measures.

• Journal of the Korean Society of School Health
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• v.18 no.2
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• pp.85-92
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• 2005

Purpose： This study reviews the Youth Risk Behavior Surveillance System (YRBSS) in the United States. This review focuses on the purposes, questionnaires, survey methods, and use of survey results. The author also discussesthe establishment and use of Korean Youth Risk Behavior Surveillance System. Results：The YRBSS was developed in 1990 to monitor priority health risk behaviors that contribute to the leading causes of death, disability, and social problems among youth and adults in the United States. The purpose of YRBSS is to determine the prevalence of health risk behaviors, to assess the trend of health risk behavior prevalence, provide comparable data, monitor progress toward achieving the Healthy People 2010. The questionnaires inquire about health-related behaviors, including tobacco use, unhealthydietary behaviors, inadequate physical activity, alcohol and drug use, sexual activity, behaviors that contribute to unintentional injuries and violence. The results of YRBS have been used to estimate the prevalence of risk behaviors among youth, to set goals for school health programs, for training and development of health program personnel, for the development of health education curriculum, to support enactment of health-related regulations, and to support funding for futher research. Conclusions： The YRBSS represents a potentially valuable program that can be applied in Korea. Assessment of risk behaviors among Korean youths will provide invaluable insight for many potential purposes.

• Journal of Biomedical Engineering Research
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• v.44 no.2
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• pp.99-108
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• 2023

According to the COVID-19, development of various medical software based on IoT(Internet of Things) was accelerated. Especially, interest in a central software system that can remotely monitor and control ventilators is increasing to solve problems related to the continuous increase in severe COVID-19 patients. Since medical device software is closely related to human life, this study aims to develop central monitoring system that can remotely monitor and control multiple ventilators in compliance with medical device software development standards and to verify performance of system. In addition, to ensure the safety and reliability of this central monitoring system, this study also specifies risk management requirements that can identify hazardous situations and evaluate potential hazards and confirms the implementation of cybersecurity to protect against potential cyber threats, which can have serious consequences for patient safety. As a result, we obtained medical device software manufacturing certificates from MFDS(Ministry of Food and Drug Safety) through technical documents about performance verification, risk management and cybersecurity application.

• Journal of the Korean Society of Marine Environment & Safety
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• v.26 no.3
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• pp.227-232
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• 2020

This paper develops a risk index based on an indicator of risk assessment in terms of coastal activity location and accident type. The risk index is derived from a formula which adds the consequence of failure to a vulnerability value, then subtracts the mitigation value. Specifically, the consequence of failure is the number of casualties in coastal activity locations. An indicator of vulnerability refers to coastal environment elements and social elements. A pointer of mitigation includes managerial and organizational elements that indicate the capabilities of coastal activities. A risk rating of coastal activity location is found from a risk matrix consisting of the accident location and type. The purpose of this study is to prevent accidents at coastal activity locations by allowing the Coastal police guard to monitor effectively and inform visitors of potential risks.