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Several Problems in Reactor Coolant System Flow Rate Measurement
Ahn, Seung-Hoon,Auh, Geun-Sun,Suh, nam-Cuk,Park, Jun-Sang,Koo, Bon-Hyun Korean Nuclear Society 1998 Nuclear Engineering and Technology Vol.30 No.6
Inspection of RCS flow measurements for the domestic pressurized water reactors has been performed by the Korea Institute of Nuclear Safety (KINS) as one of the authorized periodical inspection activities. The inspection results for the Westinghouse-type plants reveal that 1) the RCS flow instrumentation has been calibrated by using the initial design and commissioning test result, without reflecting the cycle specific reference flow measurements, 2) the loop-to-loop now variation in the actual flow measurement which has not been considered in the safety analysis affects the asymmetric How transient results, and 3) the measured RCS flows in Kori 3 and 4, Yonggwang 1 and 2 do not support the definition of the best estimate RCS flow, approaching the RCS flow limit. In this study, the revealed problems were discussed with review of the design and the RCS flow measurement uncertainty evaluation, and the technical approaches and recommendations for resolving these problems were proposed.
Diary! ether: Synthesis and biological evaluation as antimitotic agents
AHN soon Kil,LEE Mi-sung,IN Jin-Kyung,YANG Jun geun,KWAK Jae-Hwan,LEE Heesoon,JUNG Jae-Kyung,BOOVANAHALLI Shanthaveerappa K .,LEE Kyeong,CHOI Nam Song,LEE sungsook,MOON Seung Kee,KIM Soo Jin 대한약학회 2006 大韓藥學會 總會 및 學術大會 Vol.2006 No.2
Cloning and Expression of a Rice cDNA Encoding a Lls1 Homologue of Maize
Jwa, Nam-Soo,Park, Sang-Geun,Park, Chan-Ho,Kim, Soon-Ok,Ahn, Il-Pyung,Park, Sook-Young,Yoon, Choong-Hyo,Lee, Yong-Hwan The Korean Society of Plant Pathology 2000 Plant Pathology Journal Vol.16 No.3
A cDNA (Oslls1) encoding Lls1-homologue of maize was isolated from cDNA library of rice (Oryza sativa cv. Ilpum). The 2,138 bp of full length Oslls1 clone contains an open reading frame of 1,623 nucleotides encoding 575 amino acid residues. The deduced amino acid sequence of Oslls1 has a high level of homology with chlorophyll a oxygenases of Arabidopsis thaliana (67%) and Marchantia polymorpha (65%). Southern blot analysis of genomic DNA indicates the existence of a small gene family for Oslls1 in the rice genome. The expression of Oslls1 mRNA was induced in leaves and germinating seeds. Treatment of $H_2O$$_2$significantly down-regulated Oslls1 expression. The expression of Oslls1 mRNA was consititutively down-regulated in the blm, a rice mutant exhibiting spontaneous necrotic lesions. These results suggest that this Oslls1 gene may be involved incell death mechanisms in the blm mutant of rice.