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Report No.
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Activation analyses by the beam losses in the IFMIF/EVEDA accelerator

Maebara, Sunao; Takahashi, Hiroki ; Sakaki, Hironao; Hirabayashi, Keiichi*; Hidaka, Kosuke*; Shigyo, Nobuhiro*; Watanabe, Yukinobu*; Sagara, Kenshi*

In the IFMIF/EVEDA project, the engineering validation through accelerator prototype for deuteron CW beam acceleration up to 9 MeV with output current of 125 mA is planning at the BA site in Rokkasho, Aomori, Japan. The activation due to beam loss or stopping of deuterons is critical to achieve successful beam operation, analyses of source terms of radiation and activities in the accelerator structural materials, Cu, SUS316, Fe, etc., are indispensable for safety assessment to obtain permission of operation. Since there was no experimental data for Cu(d,nx) reaction in the range of 5-9 MeV, deuteron induced thick target neutron yield at 5 MeV and 9 MeV were measured in collaboration with Kyushu University. In this article, the experimental data at 9 MeV is used as a source term in neutron transportation, and isotope productions in the materials; Copper, iron and stainless steel, are evaluated by PHITS code.

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