Investigation of beam window structure for accelerator-driven system

Sugawara, Takanori  ; Suzuki, Kazuhiko; Nishihara, Kenji  ; Sasa, Toshinobu   ; Kurata, Yuji; Kikuchi, Kenji; Oigawa, Hiroyuki 

The investigations of the beam window which is one of the most critical components for the Accelerator Driven System (ADS) were performed. In the previous study, it was found that the buckling failure was the most severe failure mode for the beam window. Hence, the shape and the thickness of the beam window were optimized to prevent the buckling failure. The buckling analyses with initial imperfections were also performed to identify the level of the factor of safety (FS). The results showed that FS of 3 was conservative enough to ensure the integrity of the beam window. It was also shown that the ellipse shape concepts with the thickness of 2.0-2.4[mm] at the top and the thickness of 2.0-4.0[mm] at the transient part were acceptable under the current ADS design parameters.