Development of coupled analysis system of thermal hydraulics and structure for ADS beam window

Watanabe, Nao  ; Sugawara, Takanori  ; Nishihara, Kenji  

In order to design an accelerator driven system (ADS), a beam window, which divides between areas of an accelerator and a subcritical core, is one of important structures. JAEA made a 3D model of a beam window and surrounding lead bismuth thermal flow field and developed a coupled analysis system of thermal hydraulics and structure in ANSYS Workbench. In the system a heat generation distribution from PHITS code is read, and steady thermal hydraulic of LBE coolant and stress of the beam window are calculated by Fluent code. Then its eigenvalue buckling is evaluated. In 3D analyses, non-axisymmetric evaluations are considered and radial deformations are found in low buckling modes.