https://scholars.lib.ntu.edu.tw/handle/123456789/59998
標題: | Probabilistic analysis of core shroud cracks | 作者: | Wu, Wen-Fang Tsai, Chuen-Horng Tu, Kuan-Chywan You, Jang-Shyong |
公開日期: | 2002 | 卷: | 214 | 期: | 1-2 | 起(迄)頁: | 103-112 | 來源出版物: | Nuclear Engineering and Design | 摘要: | Traditional limit load analysis & fracture mechanics analysis have been applied to evaluate the integrity of the degraded nuclear power plant components. Although these methodologies are generally accepted by the regulatory authorities in the nuclear industry, conservatism introduced by the uncertainties of inspection, material property, crack geometry, applied loading, neutron environment, etc. is recognized to have great impact on the evaluation accuracy. A probabilistic analysis may overcome this shortcoming & reveal some additional insight to the problem. The purpose of the present study is to apply probabilistic methods to analyze the degraded core shroud, & to predict the quantitative risk of the cracked shroud. In the analysis, the loading condition, crack growth rate, material properties & existing defects are all considered random. A sample analytical result shows that, based on some previously observed data & under certain assumptions, the crack-through probability of the studied core shroud is in the order of 10−7 after 13 cycles of operation. The probability will increase considerably through operation cycles or operation years if no repair action is taken. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006111501254377 | 其他識別: | 246246/2006111501254377 | DOI: | 10.1016/S0029-5493(02)00019-5 |
顯示於: | 機械工程學系 |
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