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Performance Improvement and Validation of Advanced Safety Injection Tanks
윤영중,주인철,권태순,송철화,Youn, Young Jung,Chu, In-Cheol,Kwon, Tae-Soon,Song, Chul-Hwa Korean Society of Pressure Vessels and Piping 2011 한국압력기기공학회 논문집 Vol.7 No.1
Advanced SITs of the evolutionary PWRs have the advantage that they can passively control the ECC water discharge flow rate. Thus, the LPSI pumps can be eliminated from the safety injection system owing to the benefit of the advanced SITs. In the present study, a passive sealing plate was designed in order to overcome the shortcoming of the advanced SITs, i.e., the early nitrogen discharge through the stand pipe. The operating principle of the sealing plate depends only on the natural phenomena of buoyancy and gravity. The performance of the sealing plate was evaluated using the VAPER test facility, equipped with a full-scale SIT. It was verified that the passive sealing plate effectively prevented the air discharge during the entire duration of the ECC water discharge. Also, the major performance parameters of the advanced SIT were not changed with the installation of the sealing plate.
연구논문 : 도시유형에 따른 저탄소 도시계획요소 간의 상대적 중요도
강상준 ( Sang Jun Kang ),정주철 ( Ju Chul Jung ),권태정 ( Tae Jung Kwon ) 한국환경정책학회 2010 環境政策 Vol.18 No.1
The main purpose of this study is to explore the relative importance of urban planning elements that have been introduced as carbon reduction tools. Recently, low carbon city developments have widely burgeoned in the Republic of Korea. It is, however, in question what would be the feasible elements to be implemented in each different kind of urban and rural settings. The relative importance weights of the elements are obtained by using AHP(Analytical Hierarchy Process) method with the purposive samples of 38 professionals in the urban planning fields (CR=0.008~0.0114). The results show that the important planning elements for carbon reduction are environment-friendly land use (0.283) and green transportation (0.24) for new urban development; green transportation (0.275) and energy efficiency increment (0.230) for existing urban area on flatland; ecosystem (0.248) and environment-friendly land use (0.210) for existing urban area on hillside; ecosystem (0.299) and environment-friendly land use (0.238) for existing rural area on flatland; and ecosystem (0.326) and environment-friendly land use (0.204) for existing rural area on hillside. These findings imply that site characteristics should be interpreted throughly and the low carbon elements must be revisited and implemented with relative priority.