抄録
As one of responses to Fukushima event, structural integrity evaluation of Containment Vessel (CY) at severe accident has been promoted. This paper is intended to perform the elastic-plastic analysis of the pressure confirmatory testing of the Steel CV made in the past, to establish a method for analysis and evaluation at severe accident. Differences between test and analysis should be corrected using techniques ASME Sec. VIII which considers the effects of multiaxiality. Moreover, it is confirmed that the difference of equivalent plastic strain about 2.1 times between the test and analysis, caused by material discontinuities in the weld, for example. In ductile fracture assessment, it should be properly corrected this correction factor.
