• Title/Summary/Keyword: safety life cycle

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A Study on Application to Quality Function Deployment for Environment Evaluation (환경 평가를 위한 QFD 시스템 적용에 관한 연구)

  • Yang, Kwang-Mo;Choi, Seung-Hee;Park, Jae-Hyun;Song, Soo-Jung
    • Proceedings of the Safety Management and Science Conference
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    • 2005.11a
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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.

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Development of Environment Function deployment for Efficient Life Cycle Assessment (효율적인 전과정 평가를 위한 환경 기능 전개 시스템 개발)

  • Yang Kwang-Mo;Kim Sun-Jin;Kang Kyong-Sik
    • Journal of the Korea Safety Management & Science
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    • v.8 no.1
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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.

A Study on Algorithm of Life Cycle Cost for Improving Reliability in Product Design (제품설계 신뢰성 제고를 위한 LCC의 알고리즘 연구)

  • Kim Dong-Kwan;Jung Soo-Il
    • Journal of the Korea Safety Management & Science
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    • v.7 no.5
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    • pp.155-174
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    • 2005
  • Parametric life-cycle cost(LCC) models have been integrated with traditional design tools, and used in prior work to demonstrate the rapid solution of holistic, analytical tradeoffs between detailed design variations. During early designs stages there may be competing concepts with dramatic differences. Additionally, detailed information is scarce, and decisions must be models. for a diverse range of concepts, and the lack of detailed information make the integration make the integration of traditional LCC models impractical. This paper explores an approximate method for providing preliminary life-cycle cost. Learning algorithms trained using the known characteristics of existing products be approximated quickly during conceptual design without the overhead of defining new models. Artificial neural networks are trained to generalize on product attributes and life cycle cost date from pre-existing LCC studies. The Product attribute data to quickly obtain and LCC for a new and then an application is provided. In additions, the statistical method, called regression analysis, is suggested to predict the LCC. Tests have shown it is possible to predict the life cycle cost, and the comparison results between a learning LCC model and a regression analysis is also shown

A Systems Engineering Approach to Real-Time Data Communication Network for the APR1400

  • Ibrahim, Ahmad Salah;Jung, Jae-cheon
    • Journal of the Korean Society of Systems Engineering
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    • v.13 no.2
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    • pp.9-17
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    • 2017
  • Concept development of a real-time Field Programmable Gate Array (FPGA)-based switched Ethernet data communication network for the Man-Machine Interface System (MMIS) is presented in this paper. The proposed design discussed in this research is based on the systems engineering (SE) approach. The design methodology is effectively developed by defining the concept development stage of the life-cycle model consisting of three successive phases, which are developed and discussed: needs analysis; concept exploration; and concept definition. This life-cycle model is used to develop an FPGA-based time-triggered Ethernet (TTE) switched data communication network for the non-safety division of MMIS system to provide real-time data transfer from the safety control systems to the non-safety division of MMIS and between the non-safety systems including control, monitoring, and information display systems. The original IEEE standard 802.3 Ethernet networks were not typically designed or implemented for providing real-time data transmission, however implementing a network that provides both real-time and on-demand data transmission is achievable using the real-time Ethernet technology. To develop the design effectively, context diagrams are implied. Conformance to the stakeholders needs, system requirements, and relevant codes and standards together with utilizing the TTE technology are used to analyze, synthesize, and develop the MMIS non-safety data communication network of the APR1400 nuclear power plant.

Optimal Life Cycle Cost Design of a Bridge (교량의 생애주기비용 최적설계)

  • Park, Jang-Ho;Shin, Yung-Seok
    • Journal of the Korean Society of Safety
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    • v.25 no.6
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    • pp.115-122
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    • 2010
  • The importance of the life cycle cost (LCC) analysis for bridges has been recognized over the last decade. However, it is difficult to predict LCC precisely since the costs occurring throughout the service life of the bridge depend on various parameters such as design, construction, maintenance, and environmental conditions. This paper presents a methodology for the optimal life cycle cost design of a bridge. Total LCC for the service life is calculated as the sum of initial cost, damage cost, maintenance cost, repair and rehabilitation cost, user cost, and disposal cost. The optimization method is applied to design of a bridge structure with minimal cost, in which the objective function is set to LCC and constraints are formulated on the basis of Korean Bridge Design Code. Initial cost is calculated based on standard costs of the Korea Construction Price Index and damage cost on damage probabilities to consider the uncertainty of load and resistance. Repair and rehabilitation cost is determined using load carrying capacity curves and user cost includes traffic operation costs and time delay costs. The optimal life cycle cost design of a bridge is performed and the effects of parameters are investigated.

Low Cycle Fatigue Behavior of Cobalt-Base Superalloy ECY768 at Elevated Temperature (코발트기 초내열합금 ECY768의 고온 저주기피로 거동)

  • Yang, Ho-Young;Kim, Jae-Hoon;Ha, Jae-Suk;Yoo, Keun-Bong;Lee, Gi-Chun
    • Journal of the Korean Society of Safety
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    • v.28 no.3
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    • pp.18-22
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    • 2013
  • The Co-base super heat resisting alloy ECY768 is employed in gas turbine because of its high temperature strength and oxidation resistance. The prediction of fatigue life for superalloy is important for improving the efficiency. In this paper, low cycle fatigue tests are performed as variables of total strain range and temperature. The relations between strain energy density and number of cycle to failure are examined in order to predict the low cycle fatigue life of ECY768 super alloy. The lives predicted by strain energy methods are found to coincide with experimental data and results obtained from the Coffin-Manson method. The fatigue lives is evaluated using predicted by Coffin-Manson method and strain energy methods is compared with the measured fatigue lives at different temperatures. The microstructure observing was performed for how affect able to low-cycle fatigue life by increasing the temperature.

Reliability-Optimal Design Method of High-Speed Railway Bridges Based upon Expected Life-Cycle Cost (기대생애주기비용에 기초한 고속철도교량의 신뢰성-최적설계 방안)

  • Lee, Woo-Sang;Bang, Myung-Seok;Han, Sung-Ho;Lee, Chin-Ok
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.14 no.4
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    • pp.102-110
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    • 2010
  • The reliability evaluation may be a efficient method for estimating of the quantitative structural safety considering the effect of uncertainties included in high-speed railway bridges. The expected life-cycle cost(LCC) based upon the reliability evaluation will reasonably offer the safety level and design criteria of high-speed railway bridges. Therefore, this study determined the expected life-cycle cost and optimal design method of high-speed railway bridges on the basis of the result of the numerical analysis and reliability evaluation. For this, after creating various design method based upon the standard design of high-speed railway bridges, the numerical analysis is conducted on each of the alternative design methods. The reliability evaluation by the design strength limit state function is conducted considering the effect of external uncertainties on the basis of the numerical analysis result. The expected life-cycle cost of high-speed railway bridges is calculated on the basis of the reliability evaluation result by each of the alternative design methods. Also, the optimal design method is determined using the calculated expected life-cycle cost. In addition, The result of reliability evaluation and expected life-cycle cost of optimal design method are examined considering the effect of internal uncertainties. It is expected that the result of this study can be used as a basic information for the systematic safety evaluation and optimal structure design of high-speed railway bridges.

A study on service parts demand forecasting considering parts life cycle (부품 수명주기를 고려한 서비스 부품의 수요예측에 관한 연구)

  • Kwon, Ick-Hyun
    • Journal of the Korea Safety Management & Science
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    • v.19 no.3
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    • pp.97-107
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    • 2017
  • This research studies on the demand forecasting for service parts considering parts life cycle, that gets relatively less attentions in the field of forecasting. Our goal is to develop forecasting method robust across many situations, not necessarily optimal for a limited number of specific situations. For this purpose, we first extensively analyze the drawbacks of the existing forecasting methods, then we propose the new demand forecasting method by using these findings and reinforcement leaning technique. Using simulation experiments, we proved that the proposed forecasting method is better than the existing methods under various experimental environments.

A Scheme for the Evaluation of Tunnel Lighting Alternatives - Life Cycle Cost Comparison by Simulation Approach - (Life Cycle Cost 비교에 의한 터널조명 대안분석 연구)

  • Lee, Young-Q
    • IE interfaces
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    • v.14 no.2
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    • pp.205-209
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    • 2001
  • The number of tunnel has fast increased with the rapid expansion of highway network. Tunnel should be designed to provide for drivers both safety and pleasant driving conditions. In this perspective, the design for tunnel lightning is very important in order to provide its safety, pleasantness, and cost-efficienty of maintenance, all of which should be considered and analyzed for a better tunnel lighting. This paper attempts to compare the low-pressure sodium lamp, which has usually been used for tunnel lighting, with the fluorescent lamp, which we consider as an alternative for the former. In an effort to determine the number of lamps to meet the required illuminance in the tunnel, this research employs a simulation technique which would allow us to conjecture, with the aid of basic model, the life cycle cost for illumination per each tunnel. This analysis is expected to provide a basic method and related information for tunnel development and design.

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