• 한국안전학회지
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• 제14권2호
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• pp.11-18
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• 1999

Proper fatigue life prediction procedures are needed for mechanical structures which requires high durability and reliability. In this paper, a fatigue life prediction procedure has been developed for predicting fatigue life of moving structure under variable loadings. The developed procedure was efficiently applied for a fatigue life calculation of a container crane. Especially, the procedure is useful for safety assessment by computer simulation. A computer program was developed for fatigue life assessment by adopting the forementioned procedure.

• 한국안전학회지
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• 제21권4호
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• pp.13-18
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• 2006

In spite of frequent defect in industrial boilers, life assessment or diagnostic method for them has not been actively studied. In this research, SS400 carbon steel used in industrial boilers is simulated with artificial aging heat treatment. To do qualitative life assessment, differences in micro-structures and hardness of SS400 by the degradation time are studied. In addition, variation in material properties by aging was observed with the tensile test at room temperature and $179^{\circ}C$ and changes in ductile to brittle transition temperature was observed with the charpy impact test performed at several test temperature.

• 한국철도학회논문집
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• 제10권4호
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• pp.438-443
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• 2007

This paper proposes an integrated SE process for the development of railway systems with safety assessment included. Although the safety assessment process must be performed with SE process properly with good coordination, the interfaces between the two processes have not been clear. Thus, in many of safety critical system developments in Korea, it is difficult to assess safety in proper development phase. The process model proposed in this paper is based on both the concept of system life cycle and the repetitive use of SE process. In each of development phases, appropriate safety assessment methods are described. Also the evaluation of the integrated system incorporating safety factors is described. The resultant process model is expressed by the Enhanced Functional Flow Block Diagram (EFFBD) using a CASE tool. The model also allows timeline analysis for identifying activity flow and data flow, resulting in the effective management of process. In conclusion, the integrated process enable both the SE process and safety assessment process to cooperate with each other from early development phase throughout the whole system life cycle.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2005년도 추계학술대회
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• pp.276-280
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• 2005

Industrial processes and operations can not be accomplished independently but are connected with each others through suppliers and customer, and these ideas are fundamental notions of Life Cycle Assessment(LCA). This paper will introduce Life Cycle Assessment(LCA) in environment which is rising, and would like to build environmental management system using approach of Quality Function Deployment(QFD) and Safety Function Deployment(SFD) belonging to the assessment method.

• 한국유기농업학회지
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• 제14권2호
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• pp.139-157
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• 2006

Biotechnology has reached the level of giving birth to new forms of life and with this is a growing controversy in the conflict between science and ethics. Especially, GMOs are closely linked to the food products we consume and thus, the majority of the public shows a very sensitive reaction to the safety of GMO food products. Many perspectives arose surrounding the issues of safety on the human body and the ecology. This outlines diverse structural mechanisms to be set up to ensure safety such as risk assessment, risk management etc. Despite the precautionary principle guaranteed in many ways, the problem arises whether and how this principle can be taken in the safety assessment. GMOs due to its uniqueness do not end with just the possession of the technology involved but must also be considered with the prerequisite that they could be cultured again. Therefore the reinforcement of safety assessment system is necessary. That is, the reinforcement of risk assessment including field tests, the consideration of socio-economic effects, the coordinated system of relevant authorities, the development of technology for safety assessment.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2004년도 가을 학술발표회 논문집
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• pp.245-253
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• 2004

There has been recent demand for extending the life of age-degraded structures and equipment by such techniques as diagnosis, maintenance, safety assessment, and estimating residual life on iron-making plants and hydraulic, thermal, and nuclear power plants. These techniques take into account comprehensive scenarios that may cause malfunction and structural damage and allow an assessment of risk based on the likely scenarios. In particular the safety assessment and residual life estimation of age-degraded ships and equipment facilities require consideration of various factors such as mechanical and thermal stresses, corrosion, hardness, load variation due to changes of operating condition, crack generation and strength reduction of material by fatigue. In this study, a detail thermal stress analysis, one of useful techniques of safety assessment and maintenance, is performed on a blast furnace by using general FEM code (MSC/NASTRAN).

• 대한안전경영과학회지
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• 제8권1호
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• pp.113-130
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• 2006

As environmental damage increase by a highly developed material civilization of today, many companies take a growing immensely interest in the influence of environment for beginning a new paradigm year by year. The previous assessments dose not run the gamut of industry but is confined within a certain facility or an area. Industrial processes and operations can not be accomplished independently but are connected with each others through suppliers and customer, and these ideas are fundamental notions of Life Cycle Assessment(LCA). This paper will introduce Life Cycle Assessment(LCA) in environment which is rising, and would like to build environmental management system using approach of Quality Function Deployment(QFD) and Safety Function Deployment(SFD) belonging to the assessment method.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1016-1022
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• 2007

It is demanded to produce the safety evidence documents in other to approval safety characteristic of railway signaling system which stands is included, it is demanding from IEC 62425 standards. Also it is express clearly that safety assessment if signaling system has to be verification of these safety evidence documents. This Safety Case has the results of safety activity through system life-cycle, such as hazard lists, hazard identification and analysis, risk assessment and countermeasure, verification and test results. Consequently, first of all, the analysis and verification of these Safety Case documents has to be accomplished to approval and acceptance of signaling system safety. And also if the safety assessor was want, it is able to be experimental test auditory which is, arbitrary faults injection test, to above described documents verification. In this paper, the contents and architecture of Safety Case are presented as first steps of safety assessment technology establishment for railway signaling system.

• 한국전산구조공학회논문집
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• 제18권1호
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• pp.93-99
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• 2005

최근, 제철소, 원자력 및 수${\cdot}$화력 발전소 등 주요 기간설비에 있어서 해당 구조물, 관련 장비들의 노후화에 따른 고장진단, 수리보수, 안전성 평가와 잔여 수명 예측을 통한 수명연장에 관련된 요구가 높아지고 있다. 손상발생 시나리오의 구축, 정밀해석기법의 확립, 위험성 혹은 신뢰성 평가기술 개발 등에 관한 연구가 이러한 요구를 반영하여 활발하게 수행되고 있다. 본 연구에서는 구조물의 안전성 평가분야에서 가장 활발하게 사용되는 유한요소해석기술을 이용하여 제철설비 구조물의 안전성을 평가하는 절차를 개발하고 실제 가동 중인 고로를 대상으로 적용하여 유용성을 검토하였다.

• 한국화재소방학회논문지
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• 제33권1호
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• pp.121-129
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• 2019

현재 우리나라에서는 성능위주설계 시 시뮬레이션을 통한 인명안전성평가를 의무적으로 수행해야한다. 일반적으로 시뮬레이션을 통한 인명안전성평가 방식에는 3가지 종류가 있다. (1)화재 피난시뮬레이션을 각각 독립수행하여 특정지점에서의 ASET과 RSET을 비교하는 논커플링방식(non-Coupling)과 (2)화재 피난시뮬레이션의 결과값의 화면을 겹쳐보는 세미커플링방식(semi-Coupling), (3)화재시뮬레이션의 결과인 화재의 영향을 피난시뮬레이션에서 연동하여 수행하는 커플링수행방식(Coupling)이다. 이 중 현재까지 국내 모든 설계자들은 논커플링방식을 사용해왔다. 논커플링방식은 특정지점에서 ASET과 RSET을 비교하는 방법인 만큼 특정지점의 위치를 설정하는 것이 중요하다. 하지만 특정지점위치설정에 대한 별다른 규정이 없어 설계자의 경험과 지식을 바탕으로 정해지고 있다. 즉, 설계자에 따라 특정지점의 수, 위치가 달라져 인명안전성평가의 결과가 달라질 수 있다는 것이다. 따라서 본 연구에서는 논커플링 방식, 세미커플링방식, 커플링수행방식 3가지의 방법으로 인명안전성평가를 진행하여 결과를 비교하여 그 차이점을 파악하고, 시뮬레이션 수행 방식에 있어 개선방안을 제안하고자 한다.