• 전기산업
• /
• v.7 no.3
• /
• pp.76-82
• /
• 1996

• Proceedings of the KWS Conference
• /
• 1992.10a
• /
• pp.77-87
• /
• 1992

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
• /
• v.22 no.4
• /
• pp.257-263
• /
• 1993

• Journal of Microbiology and Biotechnology
• /
• v.27 no.11
• /
• pp.2052-2059
• /
• 2017

The emergence and dissemination of Salmonella genomic island 1 (SGI1) are strongly associated with the occurrence of multidrug-resistant (MDR) enterobacteria in humans and animals. Diverse SGI1s have been reported among Salmonella enterica and Proteus mirabilis in several countries. We aimed to characterize SGI1 in P. mirabilis isolates from humans and chickens in Chungcheong Province, Korea. A total of 44 P. mirabilis isolates were recovered from humans (n = 20) and chickens (n = 24). Antimicrobial susceptibility was determined by disk diffusion assay. To detect and characterize SGI1s, PCR amplification and PCR mapping experiments were performed. Repetitive extragenic palindromic-PCR (REP-PCR) was performed to assess the clonality of the isolates. The four P. mirabilis strains (16.7%) from chicken harbored a SGI1, whereas none of the isolates from clinical specimens contained SGI1. The SGI1s detected in our study were all confirmed as SGI1-PmABB harboring aminoglycoside-resistant genes (aacCA5 and aadA7). In P. mirabilis isolates, the presence of SGI1-PmABB was significantly correlated with high resistance rates of the isolates to antimicrobial agents, such as gentamicin, streptomycin, and spectinomycin. Moreover, the four SGI1-bearing isolates showed the same REP-PCR patterns and that suggested both horizontal and clonal spread of the isolates. This study is the first attempt to determine SGI1s in P. mirabilis isolates in Korea. We confirmed that P. mirabilis isolates carrying SGI1-PmABB were distributed at poultry farms in Korea. The present study emphasizes the need for continuous monitoring of SGI1s to prevent spreading of the MDR genomic islands among P. mirabilis isolates from humans and animals.

• Nuclear Engineering and Technology
• /
• v.25 no.2
• /
• pp.276-284
• /
• 1993

The ABB-CE System-80 reactor power cutback system(RPCS) is designed to enable continuous operation of the reactor without trip in the events of the loss of one of the two main feedwater pumps and loss of load, and thus improves plant availability in a cost effective manner. In this study expansion of RPCS has been investigated for continuous reactor operation without trip in the event of an inward control element assembly(CEA) deviation including a single rod drop. Under the expanded function of RPCS the control system will provide a rapid core power reduction on demand by releasing CEAs to drop into the core and reduce the turbine power, if necessary, to follow the reactor power variation. This design feature which is included as the new design features to be incorporated in the ABB-CE System-80+ meets the EPRI advanced light water reactor(ALWR) requirements. For this study core analysis models of System-80+ have been developed to simulate the nuclear steam supply system(NSSS) response as well as the RPCS initiation of rapid CEA insertion. The results of this study demonstrate that the reactor trip can be avoided in the event of inward CEA deviation including a single rod drop by the RPCS initiation and thus the plant availability and capacity factor would be increased.

• Proceedings of the Korean Nuclear Society Conference
• /
• 1997.10a
• /
• pp.121-126
• /
• 1997

PWR 원자력발전소의 정상 및 과도상태 운전중 동적모델과 확산모델을 이용하여 핵분열 생성물이 냉각재로 유출되는 현상을 모델링하고 국내외 핵연료 검사자료를 이용하여 개발된 전산프로 그램을 실증하였다. 손상핵연료수 예측결과 기존에 개발되어 사용되고 있는 Westinghouse사의 CADE 코드와 ABB-CE사의 IODYNE 코드보다 더 정확하였으며, 손상영역 및 연소도 예측도 비교적 정확하였다.

• Proceedings of the Korean Nuclear Society Conference
• /
• 1997.10a
• /
• pp.689-694
• /
• 1997

본 논문에서는 초음속연소 발생 기준에 대해 ABB-CE에서 System80+에 적용한 방법론과 W. Breitung 등이 최근 실험자료를 이용하여 제시한 방법론에 대한 모델의 특징을 비교ㆍ분석하였다. W. Breitung 등이 제시한 방법론을 이용한 격납건물내에서 존재할 수 있는 여러 격실크기에서 수소농도를 가정하여 초음속연소 가능성 평가 수행 및 초음속연소 발생 평가절차를 제시하였다.

• 전기산업
• /
• v.7 no.3
• /
• pp.96-101
• /
• 1996

• Nuclear Engineering and Technology
• /
• v.23 no.3
• /
• pp.340-351
• /
• 1991

Experimental studies were conducted on a l/5.03 scale reactor flow model of the Yong-gwang Nuclear Units 3 and 4. The purpose of the flow model test was to estimate the hydraulic effect in the reactor vessel due to the relative size difference between the ABB-CE's System 80 and the YGN 3&4 reactors. The flow model was designed according to the principle of similarity. Obtained from the test were the core inlet flow distribution, the core exit pressure deviations, and the segmental and overall pressure losses across the flow path from the reactor vessel inlet to outlet nozzle. These data will be used to provide input data for the core thermal margin analysis and to verify the analytical hydraulic design method.

• Proceedings of the KSME Conference
• /
• 2008.11a
• /
• pp.593-596
• /
• 2008

The reed switch position transmitter (RSPT) is used as a position indicator for the control rod in commercial nuclear power plants made by ABB-CE. But this position indicator has some problems when directly adopting it to the integral reactor. The Control Element Drive Mechanism (CEDM) for the integral reactor is designed to raise and lower the control rod in steps of 2mm in order to satisfy the design features of the integral reactor which are the soluble boron free operation and the use of a nuclear heating for the reactor start-up. Therefore the resolution of the position indicator for the integral reactor should be achieved to sense the position of the control rod more precisely than that of the RSPT of the ABB-CE. This paper adopts seismic resistance reed switches to the position indicator in order to reduce the damages or impacts during the handling of the position indicator and earthquake.