Irradiation correlation for advanced safety of nuclear systems
Project/Area Number |
25420907
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Nuclear engineering
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Research Institution | Kyoto University |
Principal Investigator |
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Project Period (FY) |
2013-04-01 – 2016-03-31
|
Project Status |
Completed (Fiscal Year 2015)
|
Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|
Keywords | 照射脆化 / 機構論 / 分子動力学法 / モンテカルロ法 / マルチスケールモデリング / 照射相関 / 銅析出物 / 欠陥集合体 / 照射損傷 / 確率論的リスク評価 / 保全の最適化 / 原子力保全 / 核融合材料設計 / 反応速度論解析 / 照射場 / 分子動力学 / ボイドスエリング / 原子力 / 材料試験炉 |
Outline of Final Research Achievements |
Irradiation embrittlement of pressure vessel steels in a fission reactor is one of the key phenomena which may determine operation lifetime. Regulations such as JEAC4201-2013 are currently used as a powerful tool to assess the degree of vessel’s embrittlement. However, even the physically-based regulations are not appropriate to be applied to the environments given by future nuclear fusion reactors and by high-level radioactive waste vessels, because those irradiation conditions are far from that of fission reactors. The objective of this study is to develop more precise assessment tool by employing a multiscale modeling approach, where the nucleation process of CRPs (copper rich precipitates) in Fe is investigated. The rate of CRP nucleation is obtained as a function of the dose-rate and temperature. Chemical composition of precipitates is also obtained. Finally, it is confirmed that our calculations are qualitatively consistent with experiments.
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Report
(4 results)
Research Products
(71 results)
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[Journal Article] Integrated Material System Modeling of Fusion Blanket2013
Author(s)
A. Sagara, R. Nygren, M. Miyamoto, D. Nishijima, R. Doerner, S. Fukada, Y. Oya, T. Oda, Y. Watanabe, K. Morishita, F. Gao, T. Norimatsu
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Journal Title
Materials Transactions
Volume: 54
Pages: 477-483
Related Report
Peer Reviewed
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