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Simulation studies of divertor detachment and critical power exhaust parameters for Japanese DEMO design
https://repo.qst.go.jp/records/81560
https://repo.qst.go.jp/records/8156035bfe1da-98c8-44ab-b332-6f625581b74a
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Asakura-JNME2021-JADEMOdivertor.pdf (3.8 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2021-01-06 | |||||
| タイトル | ||||||
| タイトル | Simulation studies of divertor detachment and critical power exhaust parameters for Japanese DEMO design | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Asakura, Nobuyuki
× Asakura, Nobuyuki× Hoshino, Kazuo× Homma, Yuuki× Sakamoto, Yoshiteru× Special Design Team for Fusion DEMO, Joint× Nobuyuki, Asakura× Yuuki, Homma× Yoshiteru, Sakamoto |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Handling of a large thermal power exhausted from the confined plasma is one of the most important issues for ITER and DEMO. A conventional divertor, which has the closed geometry similar to that of ITER and longer leg of 1.6 m, was proposed for the Japanese (JA) DEMO reactor (Rp/ap= 8.5/2.42 m). A radiative cooling scenario of Ar impurity seeding and the divertor performance have been demonstrated by SONIC simulation, in order to evaluate the power exhaust in JA-DEMO 2014 (primary design with Psep~283MW) and JA-DEMO with higher plasma elongation (a revised design with Psep~235MW). The divertor operation with the peak qtarget < 10MWm-2 was determined in the low nesep of 2-3x1019 m-3 under the severe conditions of reducing radiation loss fraction, i.e. f*raddiv = (Pradsol+Praddiv)/Psep, and diffusion coefficients (chi and D). The divertor geometry and reference key parameters (f*raddiv ~0.8, chi =1 m2/s and D = 0.3 m2/s) were so far consistent with the power exhaust concepts in the nesep range, and the revised JA-DEMO design has advantages of wider nesep range and enough margin for the divertor operation. For either severe assumption of f*raddiv~0.7 or chi and D to the half value, higher nesep operation was required for the primary design in order to control the peak qtarget < 10MWm-2, i.e. the operation window was reduced. Applying the two severe assumptions, the divertor operation was difficult in the low nesep range. | |||||
| 書誌情報 |
Nuclear Materials and Energy 巻 26, p. 100864, 発行日 2021-03 |
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| 出版者 | ||||||
| 出版者 | Elsevier Ltd. | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 2352-1791 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.nme.2020.100864 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1016/j.nme.2020.100864 | |||||
