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    National Tsing Hua University Institutional Repository > 原子科學院  > 工程與系統科學系 > 會議論文  >  BWR Parametric Sensitivity Effect of Regional Mode Instability on Stability Boundary

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/47060

    Title: BWR Parametric Sensitivity Effect of Regional Mode Instability on Stability Boundary
    Authors: Chang-Lung Hsieh;Chunkuan Shih;Hao-Tzu Lin;Jong-Rong Wang;Show-Chyuan Chiang;Tong-Li Weng;Tzung-Shiue Yang
    教師: 施純寬
    Date: 2007
    Publisher: The Japan Society of Mechanical Engineers
    Relation: 15th International Conference on Nuclear Engineering, Nagoya, Japan, April 22-26, 2007
    Keywords: Regional Mode
    Stability Analysis
    Abstract: Both in-phase (core wide mode) instability and out-of-phase (regional mode) instability are of great concerns in BWR stability issues. Normally, decay ratios for regional mode oscillations are much less than those under core wide conditions. However, under certain observation mode, the regional mode instability has the phenomenon of power increasing in one half of the core and at the same time, it decrease in the other half, so it looks like that the average power remains essentially constant. This research presents a study of fractional change of decay ratio to evaluate parametric effects of regional mode instability on reload core design power/flow stability boundary for the Chinshan Nuclear Power Plant Unit 2 Cycle 21 (BWR4). Making use of LAPUR5.2 and SIMULATE-3 codes, we have established a methodology to conduct such out-of-phase stability analysis. Many important parameters, such as system pressure, core flow rates, moderator void fraction, fuel physical and geometrical properties, have strong influences on regional mode stability. Current investigations have shown that at some operation points along the stability boundary, certain parameters present more sensitive characteristics.
    URI: http://www.jsme.or.jp/
    Appears in Collections:[工程與系統科學系] 會議論文

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