Investigation of beam window buckling with consideration of irradiation effects for conceptual ADS design

Sugawara, Takanori  ; Kikuchi, Kenji; Nishihara, Kenji  ; Oigawa, Hiroyuki 

The investigation of the beam window which is a key component in the conceptual design of Accelerator Driven System (ADS) has been performed. In the past study, it was found that the buckling failure was the most severe failure mode for the beam window from the simplified assessment. Detail structural analyses were explored to find a solution for avoiding instantaneous buckling. The results showed 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. These investigations, however, did not consider the irradiation effect by neutrons and protons. In this study, investigations based on the latest knowledge for the irradiation effect such as the data obtained in SINQ target irradiation program (STIP) are presented.