Melt layer dynamics and solidification behavior of tungsten by pulsed heat loading and evalution of surace protection layer
Project/Area Number |
25249132
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Research Category |
Grant-in-Aid for Scientific Research (A)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Nuclear fusion studies
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Research Institution | Osaka University |
Principal Investigator |
Yoshio Ueda 大阪大学, 工学研究科, 教授 (30193816)
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Co-Investigator(Kenkyū-buntansha) |
中村 浩章 核融合科学研究所, ヘリカル研究部, 教授 (30311210)
帆足 英二 大阪大学, 工学(系)研究科(研究院), 准教授 (40520698)
鈴木 哲 国立研究開発法人日本原子力研究開発機構, 核融合研究開発部門 那珂核融合研究所, 研究員 (60354619)
Lee Heun Tae (LEE Heun Tae) 大阪大学, 工学(系)研究科(研究院), 助教 (90643297)
伊庭野 健造 大阪大学, 工学(系)研究科(研究院), 助教 (80647470)
大塚 裕介 大阪大学, 工学(系)研究科(研究院), 助教 (70294048)
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Project Period (FY) |
2013-05-31 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
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Budget Amount *help |
¥45,760,000 (Direct Cost: ¥35,200,000、Indirect Cost: ¥10,560,000)
Fiscal Year 2016: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2014: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Fiscal Year 2013: ¥23,920,000 (Direct Cost: ¥18,400,000、Indirect Cost: ¥5,520,000)
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Keywords | タングステン / ディスラプション / パルス熱負荷 / 溶融挙動 / 表面保護 / 蒸気遮蔽 / 非定常熱負荷 / 溶融層ダイナミクス / ベーパーシールディング / CIPシミュレーション |
Outline of Final Research Achievements |
To simulate heat loadings by disruption in tokamak fusion reactors, pulsed laser irradiation experiments to tungsten were performed. Surfaces of melt layers became unstable as surface temperature approaches boiling temperature. As a result, significant surface morphology changes and particle emissions become significant. Melt layer stability for different W materials (pure W, W-Re, W-Ta) showed different behavior as melt layer of W-Ta was lost by bumping while the other two W materials were not. Surface protection layers by Al thin film can effectively protect surface damage. Surface damage (cracking and uneven re-solidified layers) became initiation points for large cracking. Simulation of vapor shielding was performed with a particle simulation code (PIC method). The results showed that Be PFM effectively cools down incoming plasma, but W PFM does not penetrate into edge plasma and does not cool the plasma as effectively as Be PFM.
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Report
(5 results)
Research Products
(102 results)
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[Journal Article] Damage and deuterium retention of re-solidified tungsten following vertical displacement event-like heat load2017
Author(s)
Y. Hamaji, H.T. Lee, A. Kreter, S. Moller, M. Rasinski, M. Tokitani, S. Masuzaki, A. Sagara, M. Oya, K. Ibano, Y. Ueda, R. Sakamoto
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Journal Title
Nuclear Materials and Energy
Volume: 印刷中
Pages: 1303-1307
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Surface modifications on toughened, fine-grained, recrystallized tungsten with repetitive ELM-like pulsed plasma irradiation2016
Author(s)
Kikuchi, Y., Sakuma, I., Kitagawa, Y., Asai, Y., Onishi, K., Fukumoto, N., Nagata, M., Ueda, Y., Kurishita, H.
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Journal Title
Journal of Nuclear Materials
Volume: 463
Pages: 206-209
DOI
Related Report
Peer Reviewed
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[Journal Article] Effect of temperature on microstructures and retention properties in tungsten exposed to D + He + Be mixture plasmas in PISCES2015
Author(s)
Iijima, N., Miyamoto, M., Nishijima, D., Baldwin, M.J., Doerner, R.P., Ueda, Y., Sagara, A., Hoschen, T.
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Journal Title
Journal of Nuclear Materials
Volume: 463
Pages: 979-982
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Surface erosion and modification of toughened, fine-grained, recrystallized tungsten exposed to TEXTOR edge plasma2014
Author(s)
Y Ueda, M Oya, Y Hamaji, H T Lee, H Kurishita, Y Torikai, N Yoshida, A Kreter, J W Coenen, A Litnovsky and V Philipps
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Journal Title
Physica Scripta
Volume: T159
Related Report
Peer Reviewed
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[Journal Article] Deuterium retention in Toughened, Fine-Grained Recrystallized Tungsten2013
Author(s)
M. Oya,K. Uekita,H.T. Lee,Y. Ohtsuka,Y. Ueda,H. Kurishita,A. Kreter,J.W. Coenen,V. Philipps,S. Brezinsek,A. Litnovsky, K. Sugiyama,Y. Torikai
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Journal Title
Journal of Nuclear Materials
Volume: 438
Pages: S1052-S1054
DOI
NAID
Related Report
Peer Reviewed
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[Presentation] 重み付粒子法におけるクーロン衝突モデル2016
Author(s)
田中愛士, 伊庭野健造, 滝塚知典, Heun Tae Lee, 上田良夫
Organizer
第33回プラズマ・核融合学会年会
Place of Presentation
東北大学青葉山キャンパス(宮城県、仙台市)
Year and Date
2016-11-29
Related Report
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[Presentation] Be 堆積層由来蒸気によるプラズマ冷却効果の観察2016
Author(s)
伊庭野 健造, 西島 大輔, Jonathan Yu, Matthew Baldwin, Russ Doerner, Lee Heun Tae, 上田 良夫
Organizer
第33回プラズマ・核融合学会年会
Place of Presentation
東北大学青葉山キャンパス(宮城県、仙台市)
Year and Date
2016-11-29
Related Report
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[Presentation] Measurement of tungsten optical absorption rate and dynamics of W melting behavior2016
Author(s)
MAEJI, Takeru; IBANO, Kenzo; YOSHIKAWA, Satoru; INOUE, Daisuke; KUROYANAGI, Shinpei; MORI, Kazuyuki; HOASHI, Eiji; YAMANOI, Kohei; SARUKURA, Nobuhiko; UEDA, Yoshio
Organizer
29th Symposium on Fusion Technology(SOFT2016)
Place of Presentation
Prague Congress Centre (Prague,Czech Republic)
Year and Date
2016-09-05
Related Report
Int'l Joint Research
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[Presentation] Tritium diffusion and isotope exchange in damaged tungsten2016
Author(s)
H.T. Lee, K. Uehata, Y. Torikai, Y. Hamaji, M. Oya, K. Ibano, Y. Ueda
Organizer
22nd International Conference on Plasma Surface Interactions in Controlled Fusion Devices(PSI2016)
Place of Presentation
Pontifica Urbaniana University (Roma, Italy)
Year and Date
2016-05-30
Related Report
Int'l Joint Research
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[Presentation] Observation of vaporized W, Mo, and Be in PISCES-B plasma and validation of a particle code for the vapor-shielding study2016
Author(s)
K. Ibano, D. Nishijima, J.H. Yu, M.J. Baldwin, R.P. Doerner, T. Takizuka, H.T. Lee, Y. Ueda
Organizer
22nd International Conference on Plasma Surface Interactions in Controlled Fusion Devices(PSI2016)
Place of Presentation
Pontifica Urbaniana University (Roma, Italy)
Year and Date
2016-05-30
Related Report
Int'l Joint Research
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[Presentation] Damage and deuterium retention of re-solidified tungsten following vertical displacement event-like heat load2016
Author(s)
Y. Hamaji, H. T. Lee, A. Kreter, S. Moller, M. Rasinski, M. Tokitani, S. Masuzaki,A. Sagara, M.Oya, K. Ibano, Y. Ueda, R. Sakamoto
Organizer
22nd International Conference on Plasma Surface Interactions in Controlled Fusion Devices(PSI2016)
Place of Presentation
Pontifica Urbaniana University (Roma, Italy)
Year and Date
2016-05-30
Related Report
Int'l Joint Research
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[Presentation] Tungsten fiberform nanostructure (W-fuzz) formation in ultra-long pulse helium discharge in LHD2016
Author(s)
M. Tokitani, S. Masuzaki, H. Kasahara, Y. Yoshimura, R. Sakamoto, N. Yoshida, Y. Ueda,T. Mutoh, LHD experiment group, S. Nagata
Organizer
22nd International Conference on Plasma Surface Interactions in Controlled Fusion Devices(PSI2016)
Place of Presentation
Pontifica Urbaniana University (Roma, Italy)
Year and Date
2016-05-30
Related Report
Int'l Joint Research
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[Presentation] Plasma-vapor mixed layer formation and its effects on energy transfer processes from ELM-like pulsed plasma heat loads to tungsten materials2016
Author(s)
Y. Kikuchi, I. Sakuma, T. Nakazono, W. Isono, M. Nakane, N. Fukumoto, M. Nagata, T.W. Morgan, K. Bystrov, K. Ibano, Y. Ueda
Organizer
22nd International Conference on Plasma Surface Interactions in Controlled Fusion Devices(PSI2016)
Place of Presentation
Pontifica Urbaniana University (Roma, Italy)
Year and Date
2016-05-30
Related Report
Int'l Joint Research / Invited
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[Presentation] 日米協力PHENIX計画の概要と初年度の成果2014
Author(s)
上田良夫,波多野雄治,横峯健彦,檜木達也,長谷川晃,大矢恭久,Pete Pappano, Lance Snead, Richard
Organizer
第10回核融合エネルギー連合講演会
Place of Presentation
つくば国際会議場(茨城県)
Year and Date
2014-06-19
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