Quatitative evaluation and experimantal verification on the effect of matrix microstructure on effective concentration of radiation point defect

• Project/Area Number: 23561024
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: YAMASHITA SHINICHIRO 独立行政法人日本原子力研究開発機構, 福島研究開発部門 大洗研究開発センター 福島燃料材料試験部, 研究副主幹 (10421786)
• Co-Investigator(Kenkyū-buntansha): SAKAGUCHI Norihito 北海道大学, 工学(系)研究科(研究院), 准教授 (70344489) ; SEKIO Yoshihiro 独立行政法人日本原子力研究開発機構, 福島研究開発部門大洗研究開発センター福島燃料材料試験部, 研究員 (70565689)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 原子力材料・核燃料 / 照射損傷 / ボイド欠乏帯 / 中性子照射 / 電子線照射 / オーステナイト系鋼 / オーステナイト鋼

Outline of Final Research Achievements

To provide a guidance for a reasonable material design to help developing new nuclear material, Fe-Cr-Ni ternary model alloy, each of which are main components of austenitic stainless steel, and high Ni alloy were investigated by means of in-situ observation during electron irradiation and microstructural observation for neutron-irradiated samples.
Concentration and flux of point defect were quantitatively evaluated and then effective factors (minor additives and precipitate etc) of material engineering for suppressing radiation-induced segregation and retarding onset of void swelling were successfully extracted.

Research Products

• [Journal Article] Void denuded zone formation for Fe-15Cr-15Ni steel and PNC316 stainless steel under neutron and electron irradiations (2015)
  • Author(s): Yoshihiro Sekio, Shinichiro Yamashita, Norihito Sakaguchi, Heishichiro Takahashi
  • Journal Title: Journal of Nuclear Materials Volume: 458 Pages: 355-360
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Effect of Additional Minor Elements on Accumulation Behavior of Point Defects under Electron Irradiation in Austenitic Stainless Steels (2014)
  • Author(s): Y. Sekio, S. Yamashita, N. Sakaguchi and H. Takahashi
  • Journal Title: Materials Transactions Volume: 55.No.3 Pages: 438-442
  • NAID: 130004455275
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Ｅｆｆｅｃｔ ｏｆ Ａｄｄｉｔｉｏｎａｌ Ｍｉｎｏｒ Ｅｌｅｍｅｎｔｓ ｏｎ Ａｃｃｕｍｕｌａｔｉｏｎ Ｂｅｈａｖｉｏｒ ｏｆ Ｐｏｉｎｔ Ｄｅｆｅｃｔｓ ｕｎｄｅｒ Ｅｌｅｃｔｒｏｎ Ｉｒｒａｄｉａｔｉｏｎ ｉｎ Ａｕｓｔｅｎｉｔｉｓ Ｓｔａｉｎｌｅｓｓ Ｓｔｅｅｌｓ (2014)
  • Author(s): Y. Sekio, S. Yamashita, N. Sakaguchi and H. Takahashi
  • Journal Title: Ｍａｔｅｒｉａｌｓ Ｔｒａｎｓａｃｔｉｏｎｓ Volume: ５５．Ｎｏ．３ Pages: 438-442
  • Peer Reviewed
• [Presentation] Evaluation of the irradiation-induced point defect flux on austenitic stainless steels using an in-situ observation technique during electron irradiation (2013)
  • Author(s): Y. Sekio, S. Yamashita, N. Sakaguchi and H. Takahashi
  • Organizer: Ｔｈｅ ｔｈｉｒｄ Workshop On TEM With In-Situ Irradiation (WOTWISI-3)
  • Place of Presentation: 北海道大学（札幌）
• [Presentation] Evaluation of the irradiation-induced point defect flux on austenitic stainless steels using an in-situ observation technique during electron irradiation (2013)
  • Author(s): 関尾 佳弘
  • Organizer: The Third Workshop On TEM With In Situ Irradiation (WOTWISI-3)
  • Place of Presentation: 札幌/日本
• [Presentation] The Effect of Irradiation Defect Distribution and The Steel Composition on Void Denuded Zone Formations during Neutron irradiation and Electron Irradiation (2012)
  • Author(s): 関尾 佳弘
  • Organizer: 2nd Joint IAEA-EC Topical Meeting
  • Place of Presentation: イスプラ/イタリア
• [Presentation] Void denuded zone formations under electron irradiation in austenitic stainless steels modified with oversized elements (2012)
  • Author(s): 関尾 佳弘
  • Organizer: The Nuclear Materials Conference, NuMat2012
  • Place of Presentation: 大阪/日本