Study of hydrogen trapping at vacancy-type defects in tungsten and their growth promote effect by hydrogen
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- Ohsawa Kazuhito
- Principal Investigator
- 九州大学
-
- 外山 健
- Co-Investigator
- 東北大学
About this project
- Japan Grant Number
- JP17K06993
- Funding Program
- Grants-in-Aid for Scientific Research
- Funding organization
- Japan Society for the Promotion of Science
- Project/Area Number
- 17K06993
- Research Category
- Grant-in-Aid for Scientific Research (C)
- Allocation Type
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- Multi-year Fund
- Review Section / Research Field
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- Science and Engineering > Engineering > Integrated engineering > Nuclear fusion studies
- Research Institution
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- Kyushu University
- Project Period (FY)
- 2017-04-01 〜 2023-03-31
- Project Status
- Completed
- Budget Amount*help
- 4,550,000 Yen (Direct Cost: 3,500,000 Yen Indirect Cost: 1,050,000 Yen)
Research Abstract
Tungsten shows promise as structural material used in fusion reactors in the future. Tritium used in the reactor as fuel is radioisotope and we are worried about its large amount of retention in the tungsten specimen. Vacancy and vacancy cluster in tungsten are main trap sites of the hydrogen isotope. So, their stable structures and growth process in tungsten specimen are studied by numerical simulations. As a result, impurities in the metal contribute to the stabilization of the vacancy clusters. In particular, oxygen play an important role in the stabilization.