• Proceedings of the KSR Conference
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• 2008.06a
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• pp.445-450
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• 2008

The primary role of traction power systems is to provide reliable and continuous electrical energy to satisfy traction loads. AC traction substation transforms power from generation company and supply the power to the electric railway power line. Forced outage rate(FOR) of the equipment of substation should be used in the evaluation. This paper proposes the fast and easy way to evaluate by using Bayes' theory when a new equipment is added to the existing substation facility.

• Proceedings of the KIEE Conference
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• 2000.07d
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• pp.3025-3027
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• 2000

본 논문에서는 변전소에서 수용가까지의 전력공급설비를 나타내는 도면인 배전설비도면의 주요 기호인 전주와 전선인식 방법에 관하여 기술한다 본 논문에서는 원형성에 근거하여 전주 후보를 추출한 후 이들 사이의 연결성에 근거하여 전선을 인식한 다음, 전주후보들 중에서 전주를 확인함으로써 전주와 전선을 인식하는 방법을 제안한다 제안된 방법은 다수의 배전 설비도면에 적용하여 실험하고 그 결과를 제시한다.

• The Journal of the Korea Contents Association
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• v.9 no.8
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• pp.401-411
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• 2009

Commercial sports facilities dissatisfy and have the problem in facility management and social institution when we compare with advanced nation. To develop commercial sports facilities, government must improve facility management ability and increase social institutional support. First, to improve facility management ability, government must make effort for instructor's treatment better, employment extension, strengthening of management and marketing ability, improvement of service quality and consumer satisfaction, facility's modernization. Second, to extend social institutional support, government have to make effort for cultivation and disposition of specialized human power, deregulation and institution improvement of sports facility, support extension of taxes and finance, establishing information network of sports facility. Finally, the main body of commercial sports facilities have to make progressive effort for improving facility management ability, and government have to make excellent social environment developing commercial sports facilities.

• Journal of the Korean Institute of Rural Architecture
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• v.2 no.2
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• pp.23-34
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• 2000

Many primary schools that have been an important role in the community at the same time local important facility not only local area but also all area in Korea have shown a situation for closing and into grating a school because of a social and political measure. The education policy for man power training and closing policy for small scale school not more than 100 students can't role in the rural development policy, coming farming and fishing villages. The reasons for thinking some application paradigm and closing schools have been important role in the point of education and culture parts. Of course, the application paradigm for closing school facility will get accomplished for a mood of local residents and a point of cultural deference, not keeping up unconditionally for closing a school. For accomplishing versatile purposes, initiative role of the organs of local education is very important. The organs of local education have an application paradigm that closing schools are the facilities for local organs of education will plan some specific facility to be matched for local special quality and connection quality of surrounding facility and environment. Before an application paradigm of closing school, it is very important that a fundamental factor for negligence the facility will be solved. Eventually, the organs of education have a plan for technical study of this paradigm and consider keeping and mending of closing facility, rent the facility for payment or not they want, and confer money problem not an unconditional scale.

• Journal of Distribution Science
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• v.15 no.12
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• pp.21-30
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• 2017

Purpose - This research approaches to the new niche market of medical tourism to investigate how factors of cultural similarity influence the international distribution management. This study also estimates the interaction effects of distribution channel on the relationships of facility attributes and customers' destination choice behavior. Research design, data, and methodology - We collected the sample of 881 potential customers from the more economically developed regions in China. Regression analysis is used to confirm the relationships in the research model. Results - The result shows that cultural similarity plays an important moderating role in the relationships of facility attributes and destination choice intention. For instance, power distance and masculinity interact with the distribution facility characteristics of medical quality and reputation to influence customers' selection of the destination country. Individualism, powder distance, and masculinity play moderating roles when social environment affects destination choice intention. Especially, all the elements of cultural similarity moderate the relationships between travel cost and destination choice intention. This research also proves that depending on distribution channel, determinants of distribution facility are the critical predictors of intention to select the medical service outside of China. Conclusions - The study enables managers to develop the more effective strategies reflecting the interaction effects of cultural similarity and distribution channel on customers' decision-making process.

• Nuclear Engineering and Technology
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• v.41 no.6
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• pp.765-774
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• 2009

For over 30 years, investigations of the thermohydraulic behavior of pressurized-water reactors under accident conditions have been carried out in the PKL test facility at AREVA NP in Erlangen, Germany. The PKL facility models the entire primary side and significant parts of the secondary side of a of pressurized water reactor at a height scale of 1:1. Volumes, power ratings and mass flows are scaled with a ratio of 1:145. The experimental facility consists of four primary loops with circulation pumps and steam generators (SGs) arranged symmetrically around the reactor pressure vessel (RPV). The investigations carried out encompass a very broad spectrum from accident scenario simulations with large, medium, and small breaks, over the investigation of shutdown procedures after a wide variety of accidents, to the systematic investigation of complex thermohydraulic phenomena. The PKL tests began in the mid 1970s with the support of the German Research Ministry. Since the mid 1980s, the project has also been significantly supported by the German PWR operators. Since 2001, 25 partner organizations from 15 countries have taken part in the PKL investigations with the support and mediation of the OECD/ NEA (Nuclear Energy Agency). After an overview of PKL history and a short description of the facility, this paper focuses on the investigations carried out since the beginning of the international cooperation, and shows, by means of some examples, what insights can be derived from the tests.

• Nuclear Engineering and Technology
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• v.45 no.3
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• pp.347-360
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• 2013

This paper presents an experimental investigation of the small-break loss-of-coolant accident (SBLOCA) and the loss-of-feedwater accident (LOFW) in a scaled integral test facility of REX-10. REX-10 is a small integral-type PWR in which the coolant flow is driven by natural circulation, and the RCS is pressurized by the steam-gas pressurizer. The postulated accidents of REX-10 include the system depressurization initiated by the break of a nitrogen injection line connected to the steam-gas pressurizer and the complete loss of normal feedwater flow by the malfunction of control systems. The integral effect tests on SBLOCA and LOFW are conducted at the REX-10 Test Facility (RTF), a full-height full-pressure facility with reduced power by 1/50. The SBLOCA experiment is initiated by opening a flow passage out of the pressurizer vessel, and the LOFW experiment begins with the termination of the feedwater supply into the helical-coil steam generator. The experimental results reveal that the RTF can assure sufficient cooldown capability with the simulated PRHRS flow during these DBAs. In particular, the RTF exhibits faster pressurization during the LOFW test when employing the steam-gas pressurizer than the steam pressurizer. This experimental study can provide unique data to validate the thermal-hydraulic analysis code for REX-10.

• Nuclear Engineering and Technology
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• v.53 no.3
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• pp.793-803
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• 2021

The small PWR has been paid more and more attention due to its diversity of application and flexibility in the site selection. However, the large core power density, the small containment space and the rapid accident progress characteristics make it difficult to control the containment pressure like the traditional PWR during the LOCA. The pressure suppression system has been used by the BWR since the early design, which is a suitable technique that can be applied to the small PWR. Since the configuration and operating conditions are different from the BWR, the pressure suppression system should be redesigned for the small PWR. Conducting the experiments on the scale down test facility is a good choice to reproduce the prototypical phenomena in the test facility, which is both economical and reasonable. A systematic scaling method referring to the H2TS method was proposed to determine the geometrical and thermohydraulic parameters of the pressure suppression containment response test facility for the small PWR conceptual design. The containment and the pressure suppression system related thermohydraulic phenomena were analyzed with top-down and bottom-up scaling methods. A set of the scaling criteria were obtained, through which the main parameters of the test facility can be determined.

• Nuclear Engineering and Technology
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• v.41 no.4
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• pp.447-454
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• 2009

This paper is a technical review of the research and development results of the Korea Nuclear Instrumentation and Control System (KNICS) project and Nu-Tech 2012 program. In these projects man-machine interface system architecture, two digital platforms, and several control and protection systems were developed. One platform is a Programmable Logic Controller (PLC) for a digital safety system and another platform is a Distributed Control System (DCS) for a non-safety control system. With the safety-grade platform PLC, a reactor protection system, an engineered safety feature-component control system, and reactor core protection system were developed. A power control system was developed based on the DCS. A logic alarm cause tracking system was developed as a man-machine interface for APR1400. Also, Integrated Performance Validation Facility (IPVF) was developed for the evaluation of the function and performance of developed I&C systems. The safety-grade platform PLC and the digital safety system obtained approval for the topical report from the Korean regulatory body in February of 2009. A utility and vendor company will determine the suitability of the KNICS and Nu- Tech 2012 products to apply them to the planned nuclear power plants.

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1309-1315
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• 2004

The harmonic current originated from electric cars will be cause of electromagnetic interference along adjacent communication cables and troubles with signaling. It will also cause overheating in power capacitor and malfuction in protection relay. Therefore, it brought actual measurement of harmonic current by each operation mode. Because the result exceeded the value prescribed by Korea Electric Power Corporation, we constructed facilities reducing harmonic current on overloaded part at each power supply station located in conventional line (Guro, Kyungsan, and Milyang) as an optimal alternative. Then, this study compared and analyzed the reducing effect before and after constructing facility.