C234 FACおよびLDI評価手法の妥当性検証(OS6 配管減肉研究の今後への期待)

概要

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In order to apply computer simulation codes for wall thinning due to FAC and LDI to evaluate residual life and the effectiveness of countermeasures, accuracy and applicability of the codes were confirmed based on verification and validation processes. From comparison of the calculated wall thinning rates due to FAC with hundreds of measured results for secondary piping of an actual PWR plant, it was confirmed that the calculated wall thinning rates agreed with the measured ones within a factor of 2 and the accuracy of the evaluation model for residual pipe wall thickness after one year operation had an error of less than 20%. From comparison of the calculated wall thinning rates due to LDI with measured results for vent lines of an actual BWR plant, it was confirmed that the calculated local wall thinning rates agreed with the measured ones within about a factor of 2.
一般社団法人日本機械学会の論文
2011-06-22