Effect of periodic plasma irradiation on hydrogen isotope retention in tungsten

• Project/Area Number: 18K13527
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 14020:Nuclear fusion-related
• Research Institution: Kyushu University
• Principal Investigator: Oya Makoto 九州大学, 総合理工学研究院, 助教 (10804750)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: タングステン / 水素同位体吸蔵 / 断続照射 / 照射欠陥 / 照射損傷 / プラズマ壁相互作用

Outline of Final Research Achievements

Related to tritium inventory in plasma-facing wall in an experimental fusion reactor (ITER), we investigated the effect of periodic plasma irradiation on hydrogen isotope retention in tungsten and clarified the mechanism. The retention properties were affected by two types of trapping sites with different detrapping energies. The periodic irradiations mainly had effects on the trapping sites with a low detrapping energy and reduced deuterium concentration in the trapping sites. The trapping sites could be related with blisters formed on in the tungsten surface.

Academic Significance and Societal Importance of the Research Achievements

断続照射の影響を明らかにすることは、実験室のプラズマ照射実験（連続照射）から、実験炉（断続照射）の炉壁の水素同位体蓄積量を推定するために重要である。断続照射は連続照射に比べて、表面近傍の吸蔵量が減少する可能性を示すことができ、炉壁でのトリチウム蓄積量は従来の評価値より小さくなることが期待される。また、原型炉では定常運転（連続照射）が想定されるが、実験炉と原型炉での炉壁の水素同位体蓄積量の違いを見積もることにもつながり、原型炉設計開発において燃料システムを検討する上で非常に重要であると考えられる。

Research Products

• [Journal Article] Simulation of Experimental Deuterium Retention in Tungsten under Periodic Deuterium Plasma Irradiation (2021)
  • Author(s): Makoto OYA, Yuki HARA, Kazunari KATAYAMA and Kaoru OHYA
  • Journal Title: Plasma and Fusion Research Volume: 16 Issue: 0 Pages: 2405057-2405057
  • DOI: 10.1585/pfr.16.2405057
  • NAID: 130008043189
  • ISSN: 1880-6821
  • Year and Date: 2021-05-07
  • Peer Reviewed / Open Access
• [Journal Article] Deuterium retention in tungsten irradiated by high-dose neutrons at high temperature (2021)
  • Author(s): M. Oya, M. Shimada, C.N. Taylor, M.I. Kobayashi, Y. Nobuta, Y. Yamauchi, Y. Oya, Y. Ueda, Y. Hatano
  • Journal Title: Nuclear Materials and Energy Volume: Accepted Pages: 100980-100980
  • DOI: 10.1016/j.nme.2021.100980
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurement of Dynamic Retention with Fast Ejecting System of Targeted Sample (FESTA) (2020)
  • Author(s): Q. Yue, K. Hanada, M. Oya, S. Matsuo, S. Kojima, H. Idei, T. Onchi, K. Kuroda, N. Yoshida, R. Ikezoe, Y. Liu, M. Hasegawa, S. Shimabukuro, A. Higashijima, T. Nagata and S. Kawasaki
  • Journal Title: Plasma and Fusion Research Volume: 15 Issue: 0 Pages: 2402013-2402013
  • DOI: 10.1585/pfr.15.2402013
  • NAID: 130007840523
  • ISSN: 1880-6821
  • Year and Date: 2020-04-06
  • Peer Reviewed
• [Journal Article] Atomic and Molecular Processes in Plasma Decomposition Method of Hydrocarbon Gas (2020)
  • Author(s): M. Oya, R. Ikeda and K. Katayama
  • Journal Title: Plasma and Fusion Research Volume: Accepted
  • Peer Reviewed
• [Journal Article] プロジェクトレビュー日米科学技術協力事業 PHENIX 計画‐６年間の成果と次期計画‐４．タスク３ トリチウム挙動および中性子照射効果 (2020)
  • Author(s): 大矢恭久，波多野雄治，信太祐二，山内有二，小林真，大宅諒，片山一成，大塚哲平，上田良夫
  • Journal Title: Journal of Plasma and Fusion Research Volume: 96 Pages: 140-144
• [Journal Article] Particle balance investigation with the combination of the hydrogen barrier model and rate equations of hydrogen state in long duration discharges on an all-metal plasma facing wall in QUEST (2019)
  • Author(s): K. Hanada, N. Yoshida, M. Hasegawa, A. Hatayama, K. Okamoto, I. Takagi, T. Hirata, Y. Oya, M. Miyamoto, M. Oya, et al.
  • Journal Title: Nuclear Fusion Volume: 59 Pages: 076007-076007
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Estimation of fuel particle balance in steady state operation with hydrogen barrier model (2019)
  • Author(s): Hanada K.、Yoshida N.、Takagi I.、Hirata T.、Hatayama A.、Okamoto K.、Oya Y.、Shikama T.、et al.
  • Journal Title: Nuclear Materials and Energy Volume: 19 Pages: 544-549
  • DOI: 10.1016/j.nme.2019.03.015
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Deuterium retention in tungsten irradiated by high-dose neutrons at high temperature (2021)
  • Author(s): M. Oya, M. Shimada, C.N. Taylor, M.I. Kobayashi, Y. Nobuta, Y. Yamauchi, Y. Oya, Y. Ueda and Y. Hatano
  • Organizer: 24th International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Int'l Joint Research
• [Presentation] Research on Dynamic Retention Measurement Using Fast Ejecting System of Targeted Sample (FESTA) in QUEST (2021)
  • Author(s): Q. Yue, K. Hanada, M. Oya, H. Ide, R. Ikezoe, S. Matsuo, S. Kojima, T. Onchi, K. Kuroda, N. Yoshida, M. Hasegawa, S. Shimabukuro, A. Higashijima, T. Nagata, S. Kawasaki, Y. Liu
  • Organizer: 24th International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Int'l Joint Research
• [Presentation] Simulation of Deuterium Retention in Tungsten under Periodic Deuterium Plasma Irradiation (2020)
  • Author(s): M. Oya, Y. Hara, K. Katayama and K. Ohya
  • Organizer: 29th International Toki Conference on Plasma and Fusion Research
  • Int'l Joint Research
• [Presentation] Difference of Dynamic Retention from Different Samples Using Fast Ejecting System of Targeted Sample (FESTA) (2020)
  • Author(s): Q. Yue, K. Hanada, M. Oya, S. Kojima, H. Idei, T. Onchi, K. Kuroda, N. Yoshida, R. Ikezoe, M. Hasegawa, S. Shimabukuro, A. Higashijima, T. Nagata, S. Kawasaki
  • Organizer: 29th International Toki Conference on Plasma and Fusion Research
  • Int'l Joint Research
• [Presentation] 高周波プラズマによる水蒸気の直接分解 (2020)
  • Author(s): 池田遼介, 大宅諒, 片山一成
  • Organizer: 第36回プラズマ・核融合学会年会
• [Presentation] タングステン堆積層形成過程における水素透過挙動のモデリング (2020)
  • Author(s): 平中芳樹，花田和明，片山一成，大宅諒，恩地拓己，原優樹
  • Organizer: 第36回プラズマ・核融合学会年会
• [Presentation] QUESTにおいて壁からの水素再放出現象が長時間プラズマ放電に及ぼす影響とその抑制対策 (2020)
  • Author(s): 吉田直亮，島袋瞬，牟田口崇史，大宅諒，波多野雄治，大野哲請，大矢恭久，花田和明，出射浩
  • Organizer: 第36回プラズマ・核融合学会年会
• [Presentation] 高温熱源を利用した固体酸化物電解セル高温水蒸気電解による水素製造 (2020)
  • Author(s): 酒井瞭典, 片山一成, 大宅諒, 山嵜敦広, 深田智
  • Organizer: 2020合同WEB討論会~第52回溶融塩化学討論会，第44回電解技術討論会-ソーダ工業技術討論会，第40回水素エネルギー協会大会~
• [Presentation] 高温・高照射量で中性子照射されたタングステンの水素同位体吸蔵特性 (2020)
  • Author(s): 大宅諒，Masashi Shimada，Chase N. Taylor, 小林真，信太祐二，山内有二，孫飛，大矢恭久，上田良夫，波多野雄治
  • Organizer: 日本原子力学会 2020秋の大会
• [Presentation] Atomic and Molecular Processes in Plasma Decomposition Method of Hydrocarbon gas (2019)
  • Author(s): M. Oya, R. Ikeda and K. Katayama
  • Organizer: 28th International Toki Conference on Plasma and Fusion Research
  • Int'l Joint Research
• [Presentation] Hydrogen permeation behavior through tungsten deposition layer (2019)
  • Author(s): H. Ito, K. Katayama, D. Mori and M. Oya
  • Organizer: 14th International Symposium on Fusion Nuclear Technology
  • Int'l Joint Research
• [Presentation] Measurement of Dynamic Retention with Fast Ejecting System of Targeted Sample (FESTA) (2019)
  • Author(s): Q. Yue, K. Hanada, M. Oya, S. Matsuo, S. Kojima, H. Idei, T. Onchi, K. Kuroda, N. Yoshida, R. Ikezoe, Y. Liu, M. Hasegawa, S. Shimabukuro, A. Higashijima, T. Nagata and S. Kawasaki
  • Organizer: 28th International Toki Conference on Plasma and Fusion Research
  • Int'l Joint Research
• [Presentation] QUESTにおける高速試料搬送装置での動的吸蔵量の計測 (2019)
  • Author(s): 岳其霖，花田和明，大宅諒，小島信一郎，松尾祥吾，出射浩，恩地拓己，黒田賢剛，吉田直亮
  • Organizer: 第36回プラズマ・核融合学会年会
• [Presentation] 炭化水素ガスのプラズマ分解を利用した水素同位体の抽出 (2019)
  • Author(s): 大宅諒，池田遼介，片山一成
  • Organizer: 第36回プラズマ・核融合学会年会
• [Presentation] 高温ガス炉トリチウム生産におけるトリチウム透過抑制効果の検討 (2019)
  • Author(s): 末松千里, 片山一成, 大宅諒, 松浦秀明, 大塚哲平
  • Organizer: 第36回プラズマ・核融合学会年会
• [Presentation] 土壌から植物へのトリチウム移行に関する研究 (2019)
  • Author(s): 片山一成，俣野貴宏，石井大貴，大宅諒，竹石敏治
  • Organizer: 第36回プラズマ・核融合学会年会
• [Presentation] 電磁力強制流動による液体金属中の熱輸送の促進 (2019)
  • Author(s): 廣岡慶彦，大宅諒，次木匠，花田和明
  • Organizer: 第36回プラズマ・核融合学会年会
• [Presentation] Deuterium retention in neutron irradiated tungsten-rhenium alloy and potassium-doped tungsten (2018)
  • Author(s): M. Oya, H.T. Lee, T. Yamane, A. Nakamura, H. Ito, T. Kuwabara, M. Yajima, T. Toyama, K. Suzuki, M. Takagi, N. Ohno, Y. Ueda, Y. Hatano
  • Organizer: 23rd International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Int'l Joint Research
• [Presentation] 中性子照射されたW-Re合金とK-doped Wの水素同位体吸蔵特性 (2018)
  • Author(s): 大宅諒, Lee Heun Tae, 中村揚, 伊東英貴, 桒原竜弥, 矢嶋美幸, 外山健, 鈴木克弥, 高木誠, 大野哲靖, 上田良夫, 波多野雄治
  • Organizer: 第12回核融合エネルギー連合講演会