| Project/Area Number |
26630487
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nuclear engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
Watanabe Hideo 九州大学, 応用力学研究所, 准教授 (90212323)
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| Co-Investigator(Kenkyū-buntansha) |
鎌田 康寛 岩手大学, 理工学部, 教授 (00294025)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 原子炉圧力容器 / 照射脆化 / 銅クラスター / 転位ループ / 電子線照射 / 中性子照射 |
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| Outline of Final Research Achievements |
The neutron irradiation of Fe based fission reactor materials lead to an increase in the ductile-to-brittle transition temperature (DBTT) with a decrease in the upper shelf energy. It is well known that the Cu content has a strong influence on the embrittlement phenomena; especially, the Cu-rich precipitates have been thought to be directly responsible for the embrittlement. To study the effect of dislocations loop and Cu-rich precipitates at high fluencies on radiation hardening in those steels, neutron irradiation has been conducted for Fe-0.6wt%Cu alloy. The neutron irradiation was performed in BR2 at 563K up to the dose of 5.7 x 1024 (n/m2).To know the nature of dislocation loops, additional electron irradiation was performed at room temperature. By this procedure, dislocation loops formed at 563K was identified to be interstitial type.
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