• Fire Science and Engineering
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• v.23 no.5
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• pp.32-42
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• 2009

This study aims to analyze operation status of the professional fire investigation education in Korea and derive improvement measures. Study results showed that professional fire investigation educations are conducted mainly by public sectors (Fire Service, Police, Korea Electrical Safety Corp, Korea Gas Safety Corp, etc.) and the educations conducted by National Fire Service Academy are most systematic. In addition, there was no professional fire investigation educations conducted for private sector (fire accident suffers, common peoples, etc.) In order to improve the problems, this study suggests changing the National Fire Service Academy to lifelong education system in coordinance with the scholar's courses of universities, classifying the fire inspector qualification course (executed by National Emergency Management Agency) in five stages, and opening the fire inspector qualification test to the public.

• 정보화사회
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• s.110
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• pp.48-55
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• 1997

지하매설물이란 땅속에 묻혀있는 상수, 하수, 전기, 통신, 전력 등 도시기반시설을 의미하며, 지상시설물에 비해 관리가 어렵고 예기치 않은 사고로 인해 많은 재산상, 인명상 피해를 입힐 가능성을 안고 있다. 우리는 서울 아현동과 대구에서의 대형 가스폭발사고, 도로굴착공사가 끝난지 얼마 안되는 지점에 또다른 매설물의 매설 또는 유지보수를 위해 중복공사가 일어나 교통에 혼잡을 유발하게 되는 경우를 빈번하게 경험하면서 도시의 동맥역할을 하는 이러한 지하매설물에 대한 체계적 관리가 시급함을 실감하게 된다. 특히 선진외국에서 GIS를 도입하여 지하매설물을 데이타베이스화하고 지하매설물 관리체계를 개발하여 지하매설물을 체계적으로 계획하고 관리하며, 대형사고를 사전에 예방하고, 사고가 일어난 경우에는 GIS를 활용하여 보다 신속하게 대처함으로서 피해를 최소화하는 실정을 감안할 때 GIS도입이 이러한 매설물에 대한 체계적 관리를 가능하게 하는 방안으로서 적극적으로 검토되어야 함을 느낀다. 본 글에서는 첫째, 이러한 지하매설물의 관리실태와 문제점을 분석하고 둘째, 현재 국가 및 서울시에서 추진 또는 계획 중인 지하매설물 관리체계 구축사업내용과 셋째, 지하매설물 데이터베이스가 어떻게 구축되고 유지.관리되어야 할 지에 대하여 간략히 살펴보고자 한다.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.580-581
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• 2011

국내의 지중케이블 시스템은 1970년대 154kV급 OF케이블이 도입된 이래로 현재까지 345kV급 OF/XLPE 케이블을 이용한 지중송전선로가 운영 중에 있으며, 도심지역의 전력공급을 위해 지중송전선로의 건설비중이 점차 증가하고 있다. 그러나 지중송전 계통에서 고장발생시 사회적 파장이 크고 가공송전선로에 비교할 때 복구에 대단히 많은 시간과 비용이 소요되므로 설비의 안전운전 및 장기신뢰성의 확보가 반드시 필요하다. 따라서 지중송전계통의 현장 조건을 고려한 실증시험장 구축의 필요성이 대두되어, 한국전력공사에서 정부의 인프라구축 지원사업으로 초고압 지중케이블에 대한 국제품질 공신력 확보 및 최적운영기술을 확보하기 위하여 장기 신뢰성 시험이 가능한 설비와 국제적 규모의 실증시험장을 구축하였다. 아울러 2011년 3월에는 ISO/IEC 17025에 따른 국제공인시험기관 자격을 취득하여, 국내외에서 제작되는 초고압 케이블에 대한 국제 공인시험이 가능하게 되었다. 따라서 본 논문에서는 한국전력공사 고창전력시험센터 내에 구축된 지중케이블 시험장 및 장기신뢰성 시험설비에 대한 소개와 더불어 국제표준에 따른 공인시험방안과 현재까지 지중케이블 시험장에서 수행된 케이블 시험에 대하여 소개하고자 한다.

• Journal of Korea Port Economic Association
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• v.37 no.4
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• pp.127-144
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• 2021

The purpose of this study is to derive service factors based on the "Rail Statistical Yearbook" data of railroad service providers from 1990 to 2019, and to analyze the effect of the service factors on the operating profit ratio(OPR), a representative management performance variable of railroad transport service providers. In particular, it has academic significance in terms of empirical research to evaluate whether the management innovation of the KoRail has changed in line with the purpose of establishing the corporation by dividing the research period into the first period (1990-2003) and the latter (2004-2019). The contents of this study investigated previous studies on the quality of railway passenger transportation service and analyzed the contents of government presentation data related to the management performance evaluation of the KoRail. As an empirical analysis model, a research model was constructed using OPR as a dependent variable and service factor variables of infrastructure, economy, safety, connectivity, and business diversity as explanatory variables based on the operation and management activity information during the analysis period 30 years. On the results of research analysis, OPR is that the infrastructure factor is improved by structural reform or efficiency improvement. And economic factors are the fact that operating profit ratio improves by reducing costs. The safety factor did not reveal the significant explanatory power of the regression coefficient, but the sign of influence was the same as the prediction. Connectivity factor reveals a influence on differences between first period and latter, but OPR impact direction is changed from negative in before to positive in late. This is an evironment in which connectivity is actually realized in later period. On diversity factor, there is no effect of investment share in subsidiaries and government subsidies on OPR.

• Proceedings of the KSR Conference
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• 2009.05a
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• pp.1229-1234
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• 2009

The rolling stocks of KORAIL are KTX, Saemaulho Multiple Unit(PP), New Electrical Locomotive(DL), Electrical Locomotive(EL), Diesel Locomotive, Metropolitan Commuter Train(CDC), VVVF and Resistance Controlled Multiple Unit, etc. EMU with the maximum speed of 150km/h is under the test run at the moment. Electrical Multiple Units for mainlines with 180km/h speed are supposed to be introduced as a substitute for Saemaulho Multiple Unit which is scheduled to be out of service. But the specification standard for the control board design of train driver's cab does not exist and there is no a study for layout and type of controlling device with driver's ergonomical approach. That's why the types of controller and operating are different from rolling stocks, which has high possibility of driver's human error and needs education whenever a new car comes in. Based on the opinion poll of drivers, design specification of safety engineering and ergonomics for controlling devices and safety facilities can improve exact control for devices and deal quickly with an emergency so as to improve rolling stock safety and operational efficiency.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1175-1176
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• 2015

산업설비 중, 전력케이블은 설치 이후 적게는 수년에서 많게는 수십년에 걸쳐 진단없이 계속 사용 중에 있다. 인입케이블 경우, 한국전기안전공사에서 주기적으로 사업장 정기검사 시에만 DC내전압 시험을 실시하고 있으며 그 외에는 장시간 사용에도 불구하고 상태점검을 정확히 못 하고 있다. 본 연구에서는, DC내전압 시험 대신 현장에 적용되고 있는 VLF(Very Low Frequency) 진단방법에 대하여 수도사업장(취수장, 정수장 등)에서 사용 시, 진단방법 및 결과에 대한 신뢰성을 고찰하였다.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.11 no.6
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• pp.703-710
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• 2018

Although various efforts have been made every year to reduce electric fire accidents such as accident analysis and inspection for electric fire accidents, there is no effective countermeasure due to lack of effective decision support system and existing cumulative data utilization method. The purpose of this study is to develop an algorithm for predicting electric fire based on data such as electric safety inspection data, electric fire accident information, building information, and weather information. Through the pre-processing of collected data for each institution such as Korea Electrical Safety Corporation, Meteorological Administration, Ministry of Land, Infrastructure, and Transport, Fire Defense Headquarters, convergence, analysis, modeling, and verification process, we derive the factors influencing electric fire and develop prediction models. The results showed insulation resistance value, humidity, wind speed, building deterioration(aging), floor space ratio, building coverage ratio and building use. The accuracy of prediction model using random forest algorithm was 74.7%.

• Journal of Korean Institute of Fire Investigation
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• v.11 no.1
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• pp.66-73
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• 2008

In this research, the electric power consumptions of the electrical machinery and appliances selected in the Seoul division of Korea Electrical Safety Corporation were measured. The power-saving efficiency was investigated by comparing the amounts of the reserved electric power when the Saver was on or off through measuring that of the reserved electric power before and after equipping the selected appliances with the Saver, a cutoff of the reserved electric power. As a result, the power-saving efficiency was around 18% when the Saver was installed. It can be ascribed to the removal of the source wasting electrical energy. Furthermore, by blocking the reserved electric power, the electric fire can be originally prevented and also the life time of the electrical machinery and appliances can be postponed.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.36 no.6
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• pp.598-602
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• 2023

With the purpose of instilling an awareness of the safety of users of electrical equipment and inducing voluntary facility improvement through the safety rating system for general low voltage electrical equipment, simulation and field application of the safety rating of general low voltage electrical equipment were conducted. For the introduction and application of the safety rating system for general low-voltage electrical equipment, data related to domestic safety was investigated and analyzed, cases of introduction in other fields were reviewed, and for design, the 4M risk assessment method of the Korea Occupational Safety and Health Agency and the cases of safety index development in Korea were analyzed and standardized. Safety rating system simulations were conducted for general low-voltage electrical equipment, and problem improvement measures were prepared by analyzing the results through on-site verification and simulation applied to the initial design. Design standards for the introduction of the safety rating system for general low-voltage electrical equipment were prepared, and 394 youth training facilities were applied to the field to see if the design standards were practically applicable to the field. With the application of the safety rating system for low-voltage electrical equipment for general use, youth training facilities that had been classified as 'appropriate' were able to induce an upgrade to a higher level through voluntary facility improvement according to the application of grades (A to E). As a result of inducing voluntary repair projects based on the results of the 1st and 2nd inspection of youth training facilities, it was confirmed that 86 facilities received grade A, 225 facilities received grade B, and only 311 facilities received grade A to B out of a total of 394 facilities, and there was no grade E.

• Geophysics and Geophysical Exploration
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• v.25 no.3
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• pp.120-128
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• 2022

There are 17,000 reservoir dams in Korea, of which more than 85% were built over 50 years ago. Old embankment dams are weakened by internal erosion and suffusion phenomena due to preferential leakage paths and this ongoing weakening can cause their failure. Therefore, early warning associated with leakage in an embankment dam is crucial to prevent its failure. An electrical resistivity survey is a non-destructive, real-time and in-situ technique for detecting the development of leakage zones and general conditions of embankment dams. Because of its advantages, the electrical resistivity survey is widely used for reservoir safety inspections. However, the electrical resistivity survey is still not officially included in the precise safety inspection of reservoir dams because it cannot present a quantitative index of dam safety. In this study, we propose a method for calculating the leak index according to the water content evaluated from the electrical resistivity survey and/or induced polarization survey. Particularly, by proposing a quantitative leak index calculation method from monitoring surveys and independent surveys, we provide a theoretical basis for including electrical resistivity and induced polarization surveys as components of the precise safety inspection of reservoirs dams.