Measurement of J-resistance curve using full-size tubular specimens

To act as an effective barrier against fission product, the steam generator tubes must essentially satisfy structural integrity. The measurement of J-resistance curves is necessary when the integrity assessment of steam generator tubes based on elastic-plastic fracture mechanics. However, the standard specimens can not be taken out from steam generator tubes because of the limited thickness and a conservative unstable pressure is obtained by employing the J-resistance curves satisfying plane strain condition as suggested in the ASTM standard. The objective of this study is to measure the J-resistance curve from the non-standard specimens which have the same size as real steam generator tubes. J-resistance test using full-size tubular specimen is performed under tension loading and the results are compared with other organization