224 円筒形炉内構造物の欠陥評価における未点検範囲に対する欠陥想定手法の検討(OS6-3 非破壊評価と構造モニタリング,OS6 非破壊評価と構造モニタリング)

概要

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According to "Codes for Nuclear Power Generation Facilities -Rules on Fitness-for-Service for Nuclear Power Plants- version 2004", fully penetrated flaw should be assumed for uninspected region, when SCC is found and flaw evaluation is performed on cylindrical core internals such as core shroud. This postulation is considered to be too conservative, however, especially when the uninspected region is relatively wide. This study was performed on the better assumption of flaw existence in the uninspected region to develop a more appropriate flaw modeling. Based on comparison among some possible methods, a promising postulating method is proposed from the engineering viewpoints, also considering the inclination of flaw distribution seen in the field data.
一般社団法人日本機械学会の論文
2007-10-24