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Tsukimori, Kazuyuki; Yada, Hiroki
Journal of Pressure Vessel Technology, 147(3), p.031901_1 - 031901_9, 2025/06
Times Cited Count：0 Percentile：0.00(Engineering, Mechanical)After the accident at the Fukushima Daiichi Nuclear Power Plant, very strict safety measures were implemented for nuclear power plants in Japan. It thus becomes a crucial issue if the safety of a plant is maintained or not at beyond design basis events. In this study, head plates and bellows were examined as components that compose the parts of the boundary of vessels that contain the primary coolant of a prototype fast breeder reactor. The behaviors of buckling, post-buckling deformation, and penetration failure, that is, loss of boundary function of these components with increasing pressure were investigated. The series of this research program started in FY2013 and the research proceeded step by step. The new result in this paper is the application of the proposed criteria to head plates and bellows, and a conservative estimation of penetration failure of these components is obtained.
Tsukimori, Kazuyuki; Yada, Hiroki; Jin, C.*
no journal, ,
In nuclear plants the head plate constitutes a part of the boundary of the containment vessel (CV), therefore, it is a very important issue if the function as the boundary is maintained or not in the case of severe accident (SA). Buckling and post-buckling behaviors of the head plate subjected to pressure load are affected by the thickness distribution of the head plate. In this paper a creation of 3-D thickness distribution of the head plate based on forming process simulation analysis was tried and the perspective of the modeling of 3-D thickness distribution of a head plate was discussed in comparison with the measured thickness distribution of the tested head plate specimen.
