• Proceedings of the KIPE Conference
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• 2005.07a
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• pp.581-583
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• 2005

The paper is final report for speed control upgrade and analysis report which recently performed on PWR NPP safety related EDG KHNP Ulchin NPP No.2 Unit. The upgraded system includes more beneficial function like as 'Slow start with starting ramp', 'Generator load sensing & control capability' and 'Emergency ramp during slow start'. This paper shows functional operation of slow start regime according to NRC regulatory guide which guide regulation to NPP safety related environment.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1894-1895
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• 2007

It is excitation system for nuclear emergency generator that is to startup automatically and sequentially supply essential loads with power. There are static type and alternating exciter, etc in its excitation system. An object of study is static excitation system which power is taken from power potential transformer and power current transformer. It is to complement curtailment of excitation system ability at happening short accidents. And Startup mode are quick startup and slow startup, etc. Its characteristic is looked into in this paper.

• Journal of the Korean Society of Industry Convergence
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• v.26 no.6_3
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• pp.1341-1347
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• 2023

This study proposes to ensure the seismic stability of an existing switchboard for emergency diesel generator by applying mode analysis, static analysis and dynamic analysis. First, a three dimensional model for the swithboard was made with simplification for mode analysis. Next, The mode analysis for the finite element model of the existing switchboard was performed. The 1st natural frequency below 33 Hz, the seismic safety cutoff frequency, was calculated to be 21.943 Hz. Finally, based on the seismic stability theory, the von-Mises equivalent stresses derived by structural analysis and response spectrum analysis under the normal and faulted conditions were 74.179 MPa and 49.769 MPa, respectively. These are less than specified allowable stresses. So seismic stability was confirmed.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2007.11a
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• pp.367-371
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• 2007

Large capacity UPS and emergency generators are being installed and operated at the specific target of important electric facilities that need uninterruptible power supply by the method of countermeasure against power failure for the less reliable incoming power method. Recently, CTTS (Closed Transition Transfer Switch) is being used as uninterruptible power transfer switch at the Common sources of electricity, generator and multiple generators. In this paper, construction plans for uninterruptible power supply system has been suggested in which CTTS has been applied to the secondary of incoming power generator for reliable common dual system method. By briefing the construction of incoming power facilities, large capacity UPS, emergency generator installation space and investment saving effects can be achieved.

• Journal of Power System Engineering
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• v.8 no.2
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• pp.5-11
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• 2004

The failure frequency of the Emergency Diesel Generator(EDG) at Nuclear Power Plants(NPPs) is not so much lower than that of the Marine engines, whereas the running hours of the diesel engine at NPPs is much less than those of the engines for commercial service. The primary factor results from the severe surveillance test requirements such as fast start, large number of starting test, fast load-run, high load running, etc. The other factor comes from the excessive maintenance based on the engine maker's instruction manual that did not incorporate the peculiar characteristics of the diesel engines at NPPs. In this paper, the present preventive maintenance program on the basis of the Pielstick diesel engines was reviewed for the purpose of securing the reliability of the emergency diesel generator at NPPs and the ways for its improvement were presented by referring to the overseas cases for their applications.

• The Korean Journal of Emergency Medical Services
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• v.9 no.1
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• pp.15-23
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• 2005

The purpose of this study is to analyze the propriety of portable digital X-ray Equipment for Emergency Medical Services in Daejon Emergency Medical Center in Korea. The major instruments of this study were Korean Self-Analysis Opinionnaire, Questionnaire contains 35 items which measure emergency medical personal opnions. To take the analysis of data, the total of 92 persons were investigated in Medical Information Center in Daejon Metropolitan City from 2005. 20. April to 2004. 25. May. The data were analyzed by the path analysis SPSS program. First, portable X-RAY equipment is needed to apply it to emergency. Second, it should have small and light structure compared with old equipments and have high voltage generator unit for X-RAY using inverter. Third, it should be able to send the shot data that is digital detector type without film to doctors in emergency center.

• Proceedings of the Korean Nuclear Society Conference
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• 1998.10a
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• pp.168-168
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• 1998

• Proceedings of the Korean Nuclear Society Conference
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• 2004.05a
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• pp.156-156
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• 2004

• Proceedings of the Korean Nuclear Society Conference
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• 2005.05a
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• pp.589-590
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• 2005

• Proceedings of the Korean Nuclear Society Conference
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• 2005.10a
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• pp.418-419
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• 2005