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Design outline of the accelerator prototype building for the IFMIF/EVEDA project

Kubo, Takashi; Okumura, Yoshikazu; Ohira, Shigeru; Maebara, Sunao; Sakaki, Hironao; Onishi, Seiki; Yonemoto, Kazuhiro; Kojima, Toshiyuki; Garin, P.*; Sugimoto, Masayoshi; Vermare, C.*; Shinto, Katsuhiro  ; Harami, Taikan*

The Accelerator Prototype Building for the IFMIF/EVEDA Project, in which enforce the engineering validation of the Accelerator, will be constructed in the BA site at Rokkasho-mura, Aomori-ken. Before detail design started, Japan and EU implementing agencies concluded the Procurement Arrangement based on agreed basic design. The building length is about 58 m east-west and about 37 m north-south. The area is about 2,020 m$$^{2}$$. The Accelerator Vault is center of north and south. RF and electric system are in north of the Vault, and HVAC and cooling water system are in south of the Vault. The control room is put in northwest of the building. Shielding design is based on the evaluation estimated by experts of Japan and EU. The Accelerator will accelerate deuteron to approximately 125 mA and 10 MeV, so the Accelerator Vault is covered with 1.5 m thickness normal concrete shield to protect radiation. To protect neutron streaming, the RF wave guides are through the underground pit into the Vault.

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