• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.2
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• pp.254-259
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• 2007

PM(Preventive Maintenance) can avail the generating unit to reduce cost and gain more profit in a competitive supply-side power market. So, it is necessary to perform reliability analysis on the power systems in which reliability is essential. Thus, to schedule optimal PM planning based on reliability that is defined RCM(Reliability-Centered Maintenance), FMECA(Failure Mode Effects and Criticality Analysis) assessment is very important. Therefore, in this paper, the procedure of FMECA assessment for optimal RCM is proposed by probabilistic approach using real historical failure data of combustion-turbine generators in Korean power systems. The stochastic FMECA is performed based on the effects of probable failure modes of combustion-turbine generating unit.

• Proceedings of the KSR Conference
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• 2009.05a
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• pp.643-652
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• 2009

This paper presents brief history and a state-of-the-art survey of Life Cycle Cost (LCC) analysis, in particular LCC analysis in the Urban Transit Vehicle, based on a internationl codes and standards related to LCC analysis. A main objective of the LCC analysis is to quantify the total cost of ownership of a product throughout its full life cycle, which includes research and development, construction, operation and maintenance, and disposal. The predicted LCC is useful information for decision making in purchasing a product, in optimizing design, in scheduling maintenance, or in planning overhaul. This paper presents a LCC procedure consisting of seven steps, which are "Problems definition", "Cost elements definition", "System modeling", "Data collection", "Cost profile development", "Evaluation", and "Verification". Sub-activities to be encompassed in the seven steps procedure are described.

• Journal of the Korean Home Economics Association
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• v.26 no.3
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• pp.125-134
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• 1988

This study is for classification of the management works in the Apartment House. The approach of this study depends on the consultation of concerned references and direct interview by structured questionnaire. The management works are classified and compared, analysized with foreign cases. 1) It is 13 hour a day to carring out the management works in the Board. 2) Compared the management works in the Apartment House with England and the united states, the leaders, they are the first I performing all of management. The secondaries are the Japan and Korea. Specially Japan is collecting data in the maintenance. In case of Korea, they are performing all of management but little. We expect a more thoroughgoing preinvestigation, control of planning and management of community life for the inhabitants in time to come. 3) the management works of the Apartment House are classified three types. \circled1management of administration \circled2 management of maintenance \circled3 management of community life control.

• Journal of the Korean Institute of Landscape Architecture
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• v.17 no.1
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• pp.29-42
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• 1989

도시공원의 합리적인 유지관리를 위해서는 계획 및 설계단계에서 관리체계 및 비용의 주의깊은 분석이 요구된다. 공원의 유지관리문제를 계획 및 설계단계에서 고려하여 처리할 수 있는 방법론이 개발되어짐으로써 보다 합리적인 계획 및 설계가 이루어 짐과 동시에 이상적인 유지관리가 행해 질 것으로 예상된다. 본 연구에서는 Columbus시의 도시공원을 Sampling 하여 유지관리비용(maintenance cost)을 분석하고 계획 및 설계단계에서 유지관리비용을 줄일 수 있는 한 시도로써 Simulation Model을 개발해 보았다. 앞으로 컴퓨터 정보교환체계(Interactive computer information system)를 적절히 활용한다면 도시공원계획 및 유지 관리에 보다 큰 발전이 예상된다. 이와같은 연구를 보다 발전시키기 위해 1)상세한 유지관리비용의 분석, 2) 관리비용을 절감시킬수 있는 설계기준(Criteria)의 설정, 3)계획·설계·관리를 연결시킬 수 있는 컴퓨터 정보교환체계(Interactive computer Information system)의 개발등이 더욱 연구되야 할 것으로 생각된다.

• Journal of the Korea Safety Management & Science
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• v.17 no.2
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• pp.67-78
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• 2015

The purpose of the establishment of corporation's Business Continuity Plan(BCP) is to maintain corporations' own business and establish the response plan in order to resume operation in a short time period when crisis situations occur due to natural disaster and human error. This study has presented all types of procedures and criteria which are needed to establish the airport crisis response system in order to maintain the business continuity by utilizing BCP technique. Basically the risk response procedures must be established in the process of (1) preparation stage, (2) plan development stage, (3) documentation stage, (4) test & maintenance stage. The guideline has been suggested that each stage must be carried out in the sequence of Policy & Planning Responsibility, Business Impact Analysis, Recovery Strategy & Plans, Emergency Plan & SOP, Training Awareness and Maintenance & Review

• Corrosion Science and Technology
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• v.11 no.2
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• pp.43-47
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• 2012

Recently, regulatory bodies quite often encourage to adopt risk-based inspection (RBI) and management programs because they can enhance safety simultaneously with deregulation in Korea. RBI is an integrated methodology that factors risk into inspection and maintenance decision making. This paper describes an example of how to use known risk assessment codes (API 580, API 581 BRD) to address such safety analysis requirements for risk management in the refining industry. Specifically, this paper reports the methodology and the results of implementation to the Crude Distillation Unit(CDU) plant of refinery units using the $KGS-RBI^{TM}$ program, developed by the Korea Gas Safety Corporation in reference of API Codes and ASME PC (Post Construction) with a suitable consideration of Korean situation. The results of the risk and reliability assessment using $KGS-RBI^{TM}$ program are useful in determining whether the detected defects are tolerable or required to be repaired. The subsequent decisions are to manage the future inspection, repair and maintenance planning in the risk reduction control.

• Journal of The Korean Society of Agricultural Engineers
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• v.53 no.1
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• pp.57-62
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• 2011

Block Grants System to the agriculture sector has been started from 2010. This paper has been studied for the effective Integrated Rural Development under Block Grants System. For this, project evaluation items and indicators (PEI) were studied by internal and external example and specialist questionnaire on project evaluation. As the result of study, necessity of project, faith of project, efficiency of project, utilization of resources and operating capability were established in planning step, and most important PEI was established the necessity of project. And in enforcement step, performance result, monitering, capability, achievement and maintenance were established, and most important PEI was established performance results. Finally, monitering, capability, achievement and maintenance were established in completion step.

• International Journal of Quality Innovation
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• v.7 no.2
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• pp.97-124
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• 2006

The purpose of this research is to create an expert risk-based piping system inspection model. The proposed system includes a risk-based piping inspection system and a piping inspection guideline system. The research procedure consists of three parts: the risk-based inspection model, the risk-based piping inspection model, and the piping inspection guideline system model. In this research procedure, a field plant visit is conducted to collect the related domestic information (Taiwan) and foreign standards and regulations for creating a strategic risk-based piping inspection and analysis system in accordance with the piping damage characteristics in the petrochemical industry. In accordance with various piping damage models and damage positions, petrochemical plants provide the optimal piping inspection planning tool for efficient piping risk prediction for enhancing plant operation safety.

• Journal of the Daesoon Academy of Sciences
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• v.19
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• pp.21-45
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• 2005

The purpose of this study is to examine the establishment and development of Daesoon Thought Thesaurus. Specifically, this study examined the matters to be considered in the stage of Thesauri planning according to the Thesauri Construction process : presents the methods and standards of Thesauri Construction according to processes such as identification of the indexing policy, establishment of Thesauri system, collection of vocabulary, selection of preferred term, clustering of the terms, establishment of term relationships, overall adjustment, Thesauri test, proofreading by professional display, maintenance and updating. Since religion information is unique or totally different from the information in other areas, it is most important to construct the Thesauri suitable for system after carefully recognizing the concept of religion terms.

• Nuclear Engineering and Technology
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• v.52 no.9
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• pp.1998-2008
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• 2020

Solenoid operated valves (SOV) play important roles in industrial process to control the flow of fluids. Solenoid valves can be found in so many industries as well as the nuclear plant. The ability to be able to detect the presence of faults and predicting the remaining useful life (RUL) of the SOV is important in maintenance planning and also prevent unexpected interruptions in the flow of process fluids. This paper proposes a fault diagnosis method for the alternating current (AC) powered SOV. Previous research work have been focused on direct current (DC) powered SOV where the current waveform or vibrations are monitored. There are many features hidden in the AC waveform that require further signal analysis. The analysis of the AC powered SOV waveform was done in the time and frequency domain. A total of sixteen features were obtained and these were used to classify the different operating modes of the SOV by applying a machine learning technique for classification. Also, a deep neural network (DNN) was developed for the prediction of RUL based on the failure modes of the SOV. The results of this paper can be used to improve on the condition based monitoring of the SOV.