• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.1911-1912
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• 2006

원자력 발전소가 전력계통으로부터 분리되어 외부전원으로 발전소 내부의 주요 보조기기들을 운전할 수 없는 상황에서 비상디젤 발전기는 원자력발전소의 핵심 냉각펌프 등 전원을 공급하지 않으면 안 된다. 현재까지는 품질등급 Q-Class인 비상 발전기 여자시스템이 외국 기술에 전적으로 의존하여 공급되었는데 비상발전기가 차지하는 역할의 중요성으로 인한 품질활동 절차, 규제기관의 인허가 획득 등의 문제 때문에 비상 디젤발전기의 여자시스템이 현재까지 국산 연구개발이 이루어지지 않았다. 본 논문은 원전 비상디젤 발전기 여자시스템의 국산개발에 필요한 시스템의 기기 검증에 대한 내용을 기술하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.145-146
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• 2022

IMO는 자율운항선박을 MASS라 명명하고, 이에 대한 운항안전을 위한 논의를 진행하고 있으며, 우리나라도 산·학·연·관 협의회를 통해 자율운상선박 기술개발사업을 진행하고 있다. 그 중 자율운항선박 운용과 연계된 기술기준 및 제도·인프로 구축과 관련한 세부과제로 원격검사 제도의 확대 및 기준마련이 요구되고 있다. 본 연구에서는 원격검사를 위한 선체·기관의 연구사례를 수집 및 현황을 분석하였으며, 기초단계에서의 자율운항선박의 상태감시 데이터가 원격검사의 하나의 방법이 될 수 있음을 고찰하였으며, 선박의 비상기기에 대한 원격검사방법 개발이 필요한 것으로 고려되었다.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.5
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• pp.58-69
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• 2014

To cope with sever accident like Fukushima accident, the emergency response system is needed. It consist of the hardened I&C system and the mobile control station. The hardened I&C system monitors the state in the nuclear power plant and controls the emergency equipment such as valves, pumps and the mobile control station placed at 30km away from nuclear power plant receives the status information from the hardened I&C system and transmits the control data to the hardened I&C system. In this paper, we design the emergency communication system connecting the hardened I&C system to the mobile control station and analyze the performance of the system. This system consists of the terrestrial communication system and the satellite communication. The performance such as a communication link budget, throughput and delay time is analyzed for each system.

• Journal of the Earthquake Engineering Society of Korea
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• v.11 no.6
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• pp.69-78
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• 2007

In this study, for the evaluation of seismic safety of the isolated Emergency Diesel Generator (EDG) System more quantitatively, the seismic fragility analysis method were proposed. Using the proposed method, seismic fragility analysis performed and a seismic risk of EDG system was present. The fragility analysis performed not for an existing EDG system but also for an isolated EDG system which increases the seismic capacity. At first, numerical models for existing and isolated EDG system were constructed and seismic response analysis performed according to input seismic waves and peak ground accelerations. An uncertainty factors and failure modes of both fixed and isolated EDG system were assumed for fragility analysis. The HCLPF values were evaluated for the compare the improvement effect using the isolation system. As a result, the isolation system can make better the seismic fragility of EDG system, but the failure of isolation system was govern the behavior of whole system.

• Journal of the Earthquake Engineering Society of Korea
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• v.11 no.3 s.55
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• pp.63-72
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• 2007

The Emergency Diesel Generator (EDG) is a very important equipment for the safety of a Nuclear Power Plant (NPP). In this study, the operating vibration of three kinds of EDG systems was measured. The target EDG systems are Yonggwang 5 unit and Ulchin 2 and 3 units. The Yonggwang 5 and Ulchin 3 unit EDG systems are the same type but the foundation systems are different. One is an anchor bolt type and the other is a spring and viscous-damper type. The purpose of these measurements is for a verification of the vibration isolation effect depending on the foundation system. As a result, It can be said that the spring and viscous damper system of the EDG performed better for the vibration isolation than that of anchor bolt type.

• 프린팅코리아
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• v.9 no.3
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• pp.64-65
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• 2010

인쇄기술이 하루가 다르게 발전하는 변화의 시대에 인쇄 주변기기를 개발, 보급함으로써 인쇄기술 발전에 일익을 담당하고 있는 기업이 있다. PS판 핀 펀칭기 제조 전문업체인 진성엔지니어링(대표 이평진)이다. 최근 친환경 인쇄와 관련해 폐수처리장치 집진장치 등을 제작 널리 보급하고 있는데 힘을 쏟고 있는 이 회사는 인쇄 주변기기 분야의 강자라는 평가를 뛰어넘어 인쇄 주변 기기 종합 제조사로서의 비상을 준비하고 있다.

• The Magazine for Energy Service Companies
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• s.37
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• pp.18-21
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• 2005

전라남도 여수시 율촌면 신풍리의 여수공항. 90년 한국공항공사가 여수지사를 설립한 이후 95년 공항시설 확장공사에 들어간 여수공항이 지난 11월 25일 신여객청사를 개관했다. 여수공항의 확장공사는 외관의 크기만 늘어나는 것이 아니다. 내부의 전등기기, 기계실 기기 등을 고효율기기를 활용하여 '에너지 절감'의 효과도 잡아내고 있다. 새로워진 모습으로 국제화를 위해 비상할 여수공항을 찾았다.

• Proceedings of the Korean Nuclear Society Conference
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• 1998.05a
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• pp.856-861
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• 1998

본 논문은 원자력 발전소 안전계통/기기의 신뢰도를 평가하는데 있어서 필요한 데이터들을 관리하는 프로그램인 RAM-PRO의 계발에 관하여 기술하였다. RAM-PRO는 크게 두 가지의 프로그램으로 구성하였는데, 먼저 발전과장일지를 전산화하여 안전계통/기기와 관련된 시험, 운전이력을 데이터베이스에 저장하는 프로그램인 RAM-NOTE와 그 데이터로부터 신뢰도를 자동으로 계산하여주는 신뢰도 감시 프로그램인 RAM-REL으로 구현하였다. 이의 구현으로 인하여 실제로 월성 원자력 발전소 1호기의 예비/비상디젤발전기의 실제 데이터를 RAM-NOTE를 이용하여 입력하여 보았으며, 그 입력된 데이터베이스로부터 RAM-REL을 이용하여 신뢰도를 계산하여 보았다. 현재는 원자력 발전소의 모든 안전계통/기기에 적용 할 수 있도록 확장중에 있다.

• Journal of the Earthquake Engineering Society of Korea
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• v.11 no.3 s.55
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• pp.33-42
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• 2007

In this study, for research on an improvement of the seismic safety of an EDG system, a small scale EDG system was manufactured. For the isolation system, the Coil Spring-Viscous Damper systems were selected. For the shaking table test, 3 kinds of seismic motions were selected which had different frequency contents. In this study, the isolation effects were different and they depended on the input seismic motion. In the case of an NRC earthquake which had low fiequency contents, the isolation effects of the horizontal direction were 20%. But for the seismic motions which had high fiequency contents, the isolation effects were $50{\sim}70%$. In the case of the vertical direction, poor isolation effects were observed. It was because the design properties and the real properties of the isolation system were a little different.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.24 no.2
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• pp.79-86
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• 2014

This paper describes an integrity evaluation method for emergency diesel generator(EDG) and rotor part of EDG. EDG is a very important equipment in the nuclear power plant(NPP). EDG supplies electricity to the safety-related equipments for the safety shut down of NPP in an emergency situation of earthquake. The safety of the rotor part of EDG is also important during seismic impact from earthquake. The finite element modelling of the EDG including rotor part was constructed. The modal analysis of EDG was firstly performed. The first natural frequency was calculated and revealed higher than the cutoff frequency of seismic spectrum. Then the stress analysis was done to compare with the allowable stress. The safety of the rotor part was investigated by the finite element analysis of the rotor and journal bearing interaction to find film thickness and critical speed. The seismic load was applied to rotor part in a manner that the load was a weighted static load. Analysis results showed that the maximum stress was within the range of allowable stress and the film thickness is larger than the permissible minimum thickness, and the critical speed was out of the operating speed. Hence, the structural and dynamic integrity of EDG could be confirmed by the numerical analysis method used in this paper. However, dynamic analysis of a rotating rotor and supporting bearing with the seismic impact needs to be investigated in a more rigorous method since the seismic load to the rotating part complicates the behavior of rotating system.