• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1817-1823
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• 2007

In this study, we have studied rail infrastructure related to emergency action to manage the risk when emergency caused by faults of facility or rail vehicle during operation happens. Especially we have compared the effect of emergency action with examining the structure of vehicle, tunnel, bridge and access road, etc which are related to emergency action. Also, we have tried to analyze effects of radio and communication equipment, lifesaving and refuge which could be used for rolling stock, station, control room, tunnel, bridge and etc, and we have presented the way of reporting the emergency to the train driver or crew, control room, outside networks which could be used by passengers in vehicle, station, railroad line. Based on these, we have analyzed the conduct of emergency action in length of time when emergency happens in railway and high-speed railway, and studied the method of which passengers could be guided safely and escape from the scene of the accident.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.539-545
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• 2009

KTX trains which began passenger service between Seoul and Busan in April 2004 have gained very high evaluation for their safe operation. Track is one of the most important means to keep KTX safety, it has not been a fail of safe structure. The track failure during operation may lead to a severe accident. So, it is to be verified the confidence of track maintenance management on the high speed line. This paper would like to find a track deformation trend through a comparative analysis on actual measurement data at these times. It discusses the effect of cyclic dynamic load at welding part. KTX dynamic impact load was measured in accordance with a rail surface irregularity and analyzed some track irregularities according to the condition of rail profile at welding part in the Gyeongbu high speed line.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 추계학술대회 논문집(I)
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• pp.31-37
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• 2002

Rail cars are subject to vibration, impact and wear which can cause severe defects leading to a fatal accident. Thus, they are designed and manufactured in consideration of such factors influencing their service lifetime. Under-frames are composed of steel and support most of load imposed on the car. Steel is very sensitive to corrosive environment and corroded even in a normal service condition. Regular maintenance can Protect steel Parts from corrosion by painting. However, an exposure of defect point to corrosive agents can make corrosion proceed to a considerable depth, which may cause the structure to remain under safety standard. It is necessary to understand corrosion behavior of rail cars in order to estimate unexpected accidents by corrosion.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(I)
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• pp.3-16
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• 2003

'High speed' in today's railway is generally understood to mean 'regular revenue-earning operation of passenger trains at more than 200 km/h', and true high-speed services in this sense began in Japan in 1964. Today, Japan's high-speed rail network slightly exceeds 2, 000 km, carrying around 750, 000 passengers every day without any fatal accident for nearly 40 years.(omitted)

• 전기학회논문지
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• 제60권1호
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• pp.85-92
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• 2011

Main characteristic in railroad is the guided movement of the wheel by the track through a metal-to-metal contact, conferring to the rail vehicle a single degree of freedom. There are defects such as head check, shelling, corrugation, squats etc in surface of the rail by interface between the wheel and rail. These defects bring about reducing the life-cycle of rails and track components and increasing noises. In case of bad conditions, it is possible to happen to full-scale accident such as derailment. Recently, the track capacity has been increased for increasing speed and operation efficiency. So, maintenance and indirect cost have been increased. Currently, a coating method of rail construction is proposed by using the ceramics in Korea. Rails are used as the earth in electrical railroad systems. Currently traction return current is flowed through wheels of trains. In case of rails coated, problems are caused in the contact power between wheel and coating material of spray. In this paper, electric model is presented in the AT feeding method. In case of rails coated, electric model is presented. Also, standard resistance of the ceramic is demonstrated by contact power between wheel and coating material of spray.

• 한국안전학회지
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• 제34권1호
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• pp.108-114
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• 2019

Unattended Train operation(UTO) requires higher safety target than other systems, since all train operations are automatic. The system provider to deliver without accident or failure, and the operator to transport passengers without accident by putting all trains supplied, including them, into service. Safety rates without such failures can be represented as indicators of RAMS, among which availability is continuously controllable to achieve the target, with a clear target. Availability is often required by the licensee from the initial stage of the project to demonstrate that the request for proposal (RFP) is usually specified and to maintain separate availability targets at the operational stage. In particular, unlike unmanned operation light rail in complex systems, simple formulas are often presented to facilitate verification at each stage. This paper presents this method of usability calculation in an integrated manner at all levels and analyzes the existing usability values to ensure reliability of the availability formula for integrated use in unmanned light rail systems.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.190-195
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• 2008

Surge proof equipment is an installation to make surge flow on the ground promptly so as to reduce surge-related damage on infrastructure, not to prevent surge from falling down on infrastructure directly. Compared with classical line individual earth, High speed line common earth has higher surge characteristic and plays a significant role to prevent infrastructure damage and injuries from surge, or short circuit accident between 25kV catenary and rail. In this paper, we analyzed the case of accident that caused communication/signaling system impaired while a tractor crossing level crossing at Honam line; in addition, we examined the accident reduction measures to minimize injury and property damage from cutting accidents with respect to common earth network.

• International journal of advanced smart convergence
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• 제8권4호
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• pp.161-168
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• 2019

Traffic accidents in tunnel can lead to large traffic accidents due to narrow and dark road characteristics. Therefore, special care of the driver is required when is driving in a tunnel. However, accidents can happen at any time. In the event of an accident, a narrow road structure may lead to a second accident. Therefore, all facilities installed inside the tunnel should be allowed to minimize damage in the event of an accident. We confirmed the safety of the collision target through the action of the sedan, Sport Utility Vehicle (SUV) and truck when the vehicle crashed into a stairway installed on the tunnel emergency escape route, and when a concrete barrier or guard rail was installed in front of the stairway. The behavior of the vehicle has resulted in a total of three results: rollover or rollover, change of speed and angle of the vehicle after collision. The sedan and SUV were the most secure when colliding with the guardrail, but considering the truck as a whole, concrete barriers were judged to be the most suitable for minimizing damage from the first accident and reducing the risk of the second accident.

• 한국철도학회논문집
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• 제11권1호
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• pp.81-94
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• 2008

각국은 도로혼잡과 지구온난화 등 환경문제 그리고 철도 수송 분담율 감소 등의 문제에 적극적으로 대처하기 위해 여러 가지 노력을 경주하고 있다. 그 가운데 가장 핵심적인 내용은 구조개혁을 통한 철도부문의 경쟁력 향상이다. 구조개혁은 상하분리, 민간위탁, 조직의 통폐합, 민영화 등으로 추진되고 있지만 그 중 시장 메커니즘을 적극적으로 활용하는 방안이 민영화이다. 일본은 1987년에 최초로 사하 일체와 지역별 민영화방식으로 전국을 6개 지역회사와 1개의 화물회사로 분할하여 추진하였다. 한편 영국은 1980년대 중반부터 논의를 시작하여 194년에 철도민영화를 단행하였다. 영국철도는 상하를 분리하고 기능별로 분리, 노선별로 프랜차이즈 하는 방식을 채택하였다. 그간 일본철도는 상하 일체 방식으로 영국은 상하 분리 방식의 민영화로 대별되어 각각의 장단점에 대한 많은 논의가 있었다. 특히 영국의 경우 몇 번의 대형 사고발생 원인을 기능별, 상하 분리의 민영화방식에서 찾는 분석도 있었다. 본 논문에서는 양국의 각기 다른 민영화방식에 초점을 맞추고 추진 배경과 성과 분석을 통하여 보다 합리적인 민영화정책의 추진요소과 시사점을 발견하는 것을 목적으로 하고 있다. 양국철도민영화는 철도투자와 정치적인 영향력, 추진일정 그리고 이를 추진한 그룹의 차이에의해 철도민영화방식에 차이가 생겼고, 이 때문에 양국은 다른 성과를 가져왔다. 성공적인 철도민영화는 철도에 대한 충분한 투자 하에 정치적인 일정보다는 철도발전의 계획에 따라, 그리고 철도관련이해관계자들이 민영화과정에 참여하고, 민영화를 가능케 하는 기술적인 조건 등이 구비될 경우 성공적으로 추진된다는 교훈을 얻을 수 있었다.

• 한국가스학회지
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• 제14권5호
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• pp.38-44
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• 2010

본 논문은 철도를 통해 운송되는 프로필렌의 사고위험을 정량적으로 분석하였다. 프로필렌의 수송 경로에 따라 사고 시 피해 위험이 높을 것으로 예상되는 지역인 익산역, 순천역, 전주역으로 대상지역을 선정하였다. 프로필렌의 운송 중 일어날 수 있는 사고유형을 고려한 후 ETA(Event Tree Analysis)를 이용하여 사고시나리오 및 발생빈도를 도출하였고, PHAST 6.53(Process Hazard Analysis Software Tool)을 이용하여 사고피해예측 평가 실시하여 주변에 미치는 피해정도를 산정함으로써 개인적.사회적 위험성정도를 제시하였다.