| Co-Investigator(Kenkyū-buntansha) |
NAGAI Yasuyoshi 東北大学, 金属材料研究所, 教授 (10302209)
HATAKEYAMA Masahiko 東北大学, 金属材料研究所, 助教 (30375109)
TOYAMA Takeshi 東北大学, 金属材料研究所, 助教 (50510129)
MATSUKAWA Yoshitaka 東北大学, 金属材料研究所, 助教 (70566356)
井上 耕治 東北大学, 金属材料研究所, 助教 (50344718)
唐 政 東北大学, 金属材料研究所, 助手 (80271972)
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| Budget Amount *help |
¥439,920,000 (Direct Cost: ¥338,400,000、Indirect Cost: ¥101,520,000)
Fiscal Year 2009: ¥33,670,000 (Direct Cost: ¥25,900,000、Indirect Cost: ¥7,770,000)
Fiscal Year 2008: ¥38,090,000 (Direct Cost: ¥29,300,000、Indirect Cost: ¥8,790,000)
Fiscal Year 2007: ¥48,750,000 (Direct Cost: ¥37,500,000、Indirect Cost: ¥11,250,000)
Fiscal Year 2006: ¥172,250,000 (Direct Cost: ¥132,500,000、Indirect Cost: ¥39,750,000)
Fiscal Year 2005: ¥147,160,000 (Direct Cost: ¥113,200,000、Indirect Cost: ¥33,960,000)
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| Research Abstract |
Combined using advanced positron annihilation and atom probe methods, we have revealed detailed formation and evolution of nanostructures, such as impurity-solute clusters of Cu and MnNiSi, defects and impurity segregation at grain boundaries, in nuclear reactor pressure vessels (RPVs) during long-term irradiation to clarify mechanisms of irradiation-induced degradation (embrittlement) of RPVs. Based on them we have discussed changes in the mechanical properties and make a suggestion about control and prediction of the irradiation-induced degradation.
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