• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2005년도 전력전자학술대회 논문집
• /
• pp.581-583
• /
• 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.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2007년도 제38회 하계학술대회
• /
• pp.1894-1895
• /
• 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.

• 한국산업융합학회 논문집
• /
• 제26권6_3호
• /
• pp.1341-1347
• /
• 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.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2007년도 추계학술대회 논문집
• /
• pp.367-371
• /
• 2007

무(無)정전을 요구하는 특정대상의 중요 전기시설에서, 신뢰도 낮은 수전방식의 정전 가능성 대책으로 대용량의 UPS와 비상발전기를 설치 운영 중에 있다. 근래에 와서 상용전원과 발전기 또는 복수의 발전기에 CTTS (Closed Transition Transfer Switch)를 무(無)정전 전환개폐기 전용으로 사용하고 있다. 본 논문에서 CTTS를 신뢰도 높은 상용2회선 수전방식의 수전변압기 2차 측에 적용한 새로운 무(無)정전 전원설비 구축 방안을 제안하였다. 그 결과 수전설비 구성 간략화와, UPS 비상발전기 설치 최소화로 공간 및 투자절감 효과를 얻을 수 있다.

• 동력기계공학회지
• /
• 제8권2호
• /
• pp.5-11
• /
• 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.

• 한국응급구조학회지
• /
• 제9권1호
• /
• pp.15-23
• /
• 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.

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 1998년도 추계학술발표회요약집
• /
• pp.168-168
• /
• 1998

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 2004년도 요약집 춘계학술발표대회
• /
• pp.156-156
• /
• 2004

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 2005년도 춘계학술발표회
• /
• pp.589-590
• /
• 2005

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 2005년도 추계학술발표회
• /
• pp.418-419
• /
• 2005