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Power Exhaust Concepts and Divertor Designs for Japanese and European DEMO Fusion Reactors
https://repo.qst.go.jp/records/84566
https://repo.qst.go.jp/records/8456651b81558-6aa9-46d3-8a5e-09dc5ce0aa6e
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Asakura-NF2021-JA&EU-DEMOdivertor.pdf (3.9 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2021-10-15 | |||||
| タイトル | ||||||
| タイトル | Power Exhaust Concepts and Divertor Designs for Japanese and European DEMO Fusion Reactors | |||||
| 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 |
Nobuyuki, Asakura
× Nobuyuki, Asakura× Kazuo, Hoshino (Keio University)× Satoshi, Kakudate× Fabio, Subba (Politecnico di Torino)× Christian, Vorpahl (EUROfusion Programme Management Unit)× Yuuki, Homma× Hiroyasu, Uto× Yoji, Someya× Yoshiteru, Sakamoto× Ryoji, Hiwatari× Satoshi, Suzuki× Jeong-Ha, You (Max Planck Institute for Plasma Physics)× Mattia, Siccinio (EUROfusion Programme Management Unit)× Gianfranco, Federici (EUROfusion Programme Management Unit)× Nobuyuki, Asakura× Satoshi, Kakudate× Yuuki, Homma× Hiroyasu, Uto× Yoji, Someya× Yoshiteru, Sakamoto× Ryoji, Hiwatari× Satoshi, Suzuki |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Concepts of the power exhaust and divertor design have been developed, with a high priority in the pre-conceptual design phase of the Japan-Europe Broader Approach DEMO Design Activity. A common critical issue is the large power exhaust and its fraction in the main plasma and divertor by the radiative cooling. Different exhaust concepts in the main plasma and divertor have been developed for JA and EU DEMOs. JA proposed a conventional closed divertor geometry to challenge large Psep/Rp handling of 30-35 MWm-1 in order to maintain the radiation fraction in the main plasma at the ITER-level (fradmain = Pradmain/Pheat ~0.4) and higher plasma performance. EU challenged both increasing fradmain to ~0.65 and handling the ITER-level Psep/Rp in the open divertor geometry. Power exhaust simulations have been performed by SONIC (JA) and SOLPS5.1 (EU) with corresponding Psep = 250-300 MW and 150-200 MW, respectively. Both results showed that large divertor radiation fraction (Praddiv/Psep 0.8) was required to reduce both peak qtarget ( 10MWm-2) and Te,idiv. In addition, the JA divertor performance with EU-reference Psep of 150MW showed benefit of the closed geometry to reduce the peak qtarget and Te,idiv near the separatrix, and to produce the partial detachment. Integrated designs of the water cooled divertor target, cassette and coolant pipe routing have been developed in both EU and JA, based on the tungsten (W) monoblock concept with Cu-alloy pipe. For year-long operation, DEMO-specific risks such as radiation embrittlement of Cu-interlayers and Cu-alloy cooling pipe were recognized, and both foresee higher water temperature (130-200 °C) compared to that for ITER. At the same time, several improved technologies of high heat flux components have been developed in EU, and different heat sink design, i.e. Cu-alloy cooling pipes for targets and RAFM steel ones for the baffle, dome and cassette, was proposed in JA. The two approaches provide important case-studies of the DEMO divertor, and will significantly contribute to both DEMO designs. | |||||
| 書誌情報 |
Nuclear Fusion 巻 61, 号 12, p. 126057, 発行日 2021-11 |
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| 出版者 | ||||||
| 出版者 | IOP Publishing | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0029-5515 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/1741-4326/ac2ff4 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1088/1741-4326/ac2ff4 | |||||
