2015 Fiscal Year Final Research Report
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
|
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 |
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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Free Research Field |
原子力材料
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