International round robin analysis of probabilistic fracture mechanics for reactor pressure vessel during cool-down and LTOP event

Kanto, Yasuhiro*; Onizawa, Kunio ; Osakabe, Kazuya*; Yoshimura, Shinobu*

The international Round Robin (RR) activity was performed in PFM sub-committees in JWES in conjunction with Korea and Taiwan research groups. The purposes of this program were to establish reliable procedures to evaluate fracture probability of reactor pressure vessels during pressurized thermal shock and to maintain the continuous cooperation among Asian institutes in the probabilistic approach to nuclear safety. The results of this work were summarized at the previous ASINCO workshop in 2010. Here, as the phase 2 of the program, a new international round robin activity is planned. This paper describes the outline of the problem. The aims of the program and the matters to be noticed is presented.