Failure mode of ED and AD type head plates subject to convex side pressure

Yada, Hiroki ; Ando, Masanori ; Tsukimori, Kazuyuki; Ichimiya, Masakazu*; Anoda, Yoshinari*

The head plate that composes the boundary between primary and secondary coolant in intermediate heat exchanger of FBR has an important role when the progress of the BDBE is considered. In order to develop the evaluation method of the pressure toughness of the head plate under the BDBE, the pressure failure tests and finite element analysis of two types of head plate subjected to convex side pressure was performed in this study. It can be concluded that a failure mode of a head plate subjected convex side pressure is circumferential through-wall crack caused by straightening following the bending deformation near the rim.