Beam window design for accelerator-driven system

Sugawara, Takanori  ; Eguchi, Yuta ; Obayashi, Hironari  ; Iwamoto, Hiroki   ; Tsujimoto, Kazufumi 

A new beam window concept for accelerator-driven system (ADS) is investigated by changing the design condition. New proton beam current, which is an important factor for the beam window design was derived by the neutronics calculation. Based on the new proton beam current, the investigation of the beam window was performed by the couple analyses of the particle transport, the thermal hydraulics and the structural analysis. Through these coupled analyses, it was found that hemispherical shapes with the outer radius = 180-235 mm and the thickness at the top = 1.5-3.5 mm were acceptable for the beam window.