Progress of provision activity for ITER divertor procurement, 1; Fabrication of qualification prototype and its heating tests

Ezato, Koichiro; Suzuki, Satoshi; Seki, Yohji; Yokoyama, Kenji; Dairaku, Masayuki; Enoeda, Mikio; Mori, Seiji; Yamada, Hirokazu*; Mori, Kensuke*

JAEA was designated as the domestic agency of Japan (JADA). JADA is going to procure the whole divertor outer vertical target in the ITER divertor. Toward the manufacturing of the outer vertical target components, JADA has extensively conducted the R&D's on the bonding structure with CFC and tungsten armor under close collaboration with ITER Organization (IO). By the integration of the manufacturing technologies, JADA has developed vertical target qualification prototypes (QPs) which incorporate almost every technological feature necessary to manufacture the outer vertical target. A high heat flux testing of the QP has been performed in Efremov institute. The QP has withstood the repetitive heat flux up to 20 MW/m for 1,000 cycles on the CFC armor and up to 5 MW/m for 1,000 cycles on the tungsten armor. Based on this successful result, JADA has been qualified as a party, which has sufficient technical capabilities to proceed the subsequent divertor procurement, by IO.