• 시스템엔지니어링학술지
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• 제19권1호
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• pp.29-38
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• 2023

Independent Safety Assessment (ISA) is a third-party assessment that is to confirm that the system satisfies the safety requirements in the defined operational context. The process of this assessment often brings about many complex arguments that should be supported by evidence and justification. The communication between arguments and evidence is of the most importance in the context of safety case. This study illustrates how NOR-STA can be used for ISA process, showing the effective structure of safety compliance. The study outlines the steps to breaks down the top goal into many elements such as arguments, sub-goals, justification, context and assumptions. It concludes that the evidence-based safety conformance process utilizing NOR-STA provides a more effective and systematic representation of the independent safety assessment process in conformance cases.

• 한국안전학회지
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• 제13권1호
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• pp.98-104
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• 1998

Recently, industrial accidents have occurred in various patterns due to the diversity of industries and the integration of facilities. Especially, the major accidents affect broad area and result in huge loss of lives and properties. Domestic researches on techniques for keeping away from such hazardous danger have been actively performed but their activities are limited in some institutes and universities. In advanced countries, integrated management systems like Seveso Directive of EU and OSHA(Occupational Safety and Health Act) of U.S.A. have been legislated along with the systematic research activities. In Korea, the integrated safety management systems called SMS(Safety Management System) and PSM(Process Safety Management) have been applied to major industries. These systems made chemical industries manage the process safety information by collecting and arranging safety data by themselves. In order to implement the system successfully, it is urgently required to prepare a tool for searching and accumulating process safety data systematically. In this study, a computerized prototype of Risk Assessment System which is essential to SMS and PSM was developed as a main system and data base as subsystem to handle safety information.

• 시스템엔지니어링학술지
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• 제10권2호
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• pp.43-50
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• 2014

The Centralized Traffic Control(CTC) System of Urban Railway is an element(subsystem) of the Urban Railway system to aim safety operation and efficient management of rolling stock in accordance with a train scheduling program in train operation ways. That's why the CTC System must be developed considering systematic and safety-guaranteed methods such as RAMS(Reliability, Availability, Maintainability, and Safety) refereed to IEC standards. The CTC System is consists of rolling stock, signaling, power supply, communication, and mechanical equipment and preforms control and remote monitoring functions. The technical activities considering safety process are very important at such an early stage of development in a railway project. This paper introduces RAMS activities and an independent safety assessment by $3^{rd}$ Party focused on a safety applied to a development of the CTC system of Urban Railway and proposes the experiences as well practices.

• 한국안전학회지
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• 제14권1호
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• pp.167-176
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• 1999

Construction accidents occur reiteratively in similar fashions. There have been several attempts to develop a safety program for preventing construction accidents on sites. It will be very effective to use previous accident cases for establishing proper safety plan and managing safety process. This research develops a case-based construction safety management system which enables construction managers or safety managers to prevent potential accidents during the construction process. The case-oriented approach is performed through the representation of previous accident cases in accordant with the similarity to the conditions of current site. It uses a case-based reasoning which is one of the reasoning methods of an expert system. A prototype system for the reasoning model was implemented using one of the case based system development tools. The system was applied to a real construction site to verify its capability and validity. It was founded that the causes of accidents were successfully removed, so the proposed model proved to be reasonable. Additional research is needed to resolve the technical problem how to adapt the countermeasures for accident prevention provided by the reasoning model.

• 한국가스학회지
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• 제26권2호
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• pp.27-38
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• 2022

선진국에서는 공정안전관리제도의 도입으로 사고는 상당히 감소하였으나, 규제적 성격을 띄며, 실질적인 사업장안전관리의 실태를 보여주기 어렵다는 한계를 보인다. 많은 기관에서 공정안전상태를 포괄적으로 모니터링 할 수 있는 공정안전성과지표의 사용을 권장하고 있다. 본 연구에서는 공정안전성과지표 적용을 위하여 관련 Guideline을 비교·분석하고 사업장의 공정안전시스템을 분석하여 지표로 활용하는 방안을 검토하였다. 문헌적 지표에서는 절차의 준수 여부 위주로 확인하는 반면, 시스템 기반의 지표에서는 안전시스템의 특정 목적을 위한 절차나 검사 등을 명확하게 식별할 수 있도록 하고, 운영상태가 어떤지 측정하여 모니터링 할 수 있다. 이러한 특성은 안전관리 활동을 운영함에 있어 도출되는 보완사항들의 명료성 측면에서 더 유리함을 알 수 있다. 이를 활용하여 사업장 안전관리 수준을 효과적으로 보여줄 수 있다.

• 한국가스학회지
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• 제3권1호
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• pp.8-13
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• 1999

산업안전보건법 제49조 2에 의거하여 유해$\cdot$위험설비를 보유한 사업장의 사업주는 당해 설비로부터 위험물질의 누출, 화재, 폭발 등으로 인하여 사업장내의 근로자에게 즉시 피해를 주거나 사업장 인근지역에 피해를 줄 수 있는 중대산업사고를 예방하기 위해 사업장이 공정안전관리를 시행해야 한다. 그러나 국내의 많은 화학관련 기업들은 안전관리에 많은 시간과 인력을 투자하는 경향이 증가하였으나 아직까지는 대기업에 소속된 화학공장에 국한되어 있으며, 특히 IMF시대에 중$\cdot$소기업 형태의 화학공장은 자금압박 등의 어려움으로 생산성 향상에 급급한 나머지 안전에 대한 인적$\cdot$물적 투자를 꺼려하는 경향이 지배적이다. 따라서 중$\cdot$소 화학공장이 갖고 있는 경제적, 현실적 문제점을 보완함과 동시에 능동적으로 공정의 안전성을 확보하는데 도움을 줄 수 있는 공정안전관리 시스템을 구축하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1084-1091
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• 2011

The primary purpose of the safety management is to prevent the loss of lives or physical damages arising from potential hazards in the railway signaling system. Since such potential hazards may occur at any time during the system life-cycle from design and development to maintenance, safety management activities have to be continuously taken in the course of the system life-cycle. In this paper, presented for Safety Activity Process. (Phase, Methods, Documentation)

• 대한안전경영과학회지
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• 제20권3호
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• pp.1-9
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• 2018

This study is intended to look into the effect of construction safety supervision system on risk control and reduction. To achieve this, a survey was carried out to 114 companies in construction, ordering, contract and management. The overall findings were as follows. The effect of construction safety supervision system on risk control and reduction showed that factors of supervision system, supervision cost and supervision method had a positive effect on risk control and reduction. And their perception of the introduction of safety supervision system in construction sites according to process showed that there was a difference between them according to the field of ordering, contract and supervision. There was the biggest difference between owner and contractor in double supervision system, but no difference between them in the perception of risk reduction. These results show that all ordering, contract and supervision are positively needed for the introduction of construction safety supervision. This means that there is a difference between owner and contractor in the perception of process according to system operation. All companies agree to system improvement by the settlement of safety supervision system for the prevention of safety accidents and safe construction, but the systematic complement of safety supervision is the burden of contractor. And there is a big difference between owner and contractor in the perception of responsibility and concern for cost burden.

• 한국안전학회지
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• 제26권5호
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• pp.46-53
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• 2011

The risk assessment of thermal behavior and runaway reaction cased by an exothermic batch process in manufacture of the vinyl acetate resin are described in the present paper. The aim of the study was to evaluate the risk of runaway reaction with operating parameters such as a reaction inhibitor, reaction temperature and a mount of methanol charged in the vinyl acetate polymerization process. The experiments were performed by a sort of calorimetry with the Multimax reactor system as a screening tool to investigate runaway reaction. From the experimental results, it was found that we could occur the auto acceleration for reaction of raw materials with operating parameters over $65^{\circ}C$ of reaction temperature in the vinyl acetate polymerization process.

• 대한안전경영과학회지
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• 제2권4호
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• pp.19-32
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• 2000

Assignable causes producing temporary deviation from the underlying system can influence on process adjustment and process monitoring in dynamic feedback control system. In this paper, the impact of assignable causes on EWMA forecasts and process adjustment which is based on the EWMA forecasts are derived for optimum control methods.