ウエダ　ヨシオ   Ueda Yoshio   上田　良夫    所属   追手門学院大学  理工学部 電気電子工学科    職種   教授
言語種別	英語
発行・発表の年月	2018/11
形態種別	論文
査読	査読あり
標題	Plasma exhaust and divertor studies in Japan and Europe broader approach, DEMO design activity
執筆形態	共著・編著（代表編著を除く）
掲載誌名	Fusion Engineering and Design
巻・号・頁	136,pp.1214-1220
国際共著	国際共著
著者・共著者	Nobuyuki Asakura,Kazuo Hoshino,Hiroyasu Utoh,Youji Someya,Satoshi Suzuki,Christian Bachmann,Holger Reimerdes,Ronald Wenninger,Hironobu Kudo,Shinsuke Tokunaga,Yuki Homma,Yoshiteru Sakamoto,Ryoji Hiwatari,Kenji Tobita,Jeong Ha You,Gianfranco Federici,Koichiro Ezato,Yohji Seki,Yoshio Ueda,Noriyasu Ohno
概要	Power exhaust scenario and divertor design for a steady-state Japan (JA) DEMO and a pulse Europe (EU) DEMO1 have been investigated as one of the most important common issues in Broader Approach DEMO Design Activity. Radiative cooling is a common approach for the power exhaust scenario. For the JA DEMO, development of the divertor design appropriate for high Psep/Rp ∼30 MW m−1 is required, while the radiation fraction in the main plasma (fradmain = Pradmain/Pheat) is ITER-level (0.40–0.45) and the exhaust power above the L- to H-mode power threshold (fLH = Psep/PthLH) is large margin (∼2). For the EU DEMO1, larger fradmain (=0.67) and smaller fLH (=1.2) plasma is required, using higher-Z impurity seeding, in order to apply ITER-level divertor (Psep/Rp = 17 MW m−1). ITER technology, i.e. water cooling with W-monoblock and Cu-alloy (CuCrZr) heat sink, is a baseline for JA and EU to handle the peak heat load of 10 MW m−2-level, and neutron flux and irradiation dose are comparable.
DOI	10.1016/j.fusengdes.2018.04.104
ISSN	0920-3796