Desorption of implanted deuterium in heavy ion-irradiated zry-2

Hideo Watanabe, Yoshiki Saita, Katsuhito Takahashi, Kazufumi Yasunaga

研究成果: Contribution to journalArticle査読


To understand the degradation behavior of light water reactor (LWR) fuel-cladding tubes under neutron irradiation, a detailed mechanism of hydrogen pickup related to the point defect formation (i.e., a-component and c-component dislocation loops) and to the dissolution of precipitates must be elucidated. In this study, 3.2 MeV Ni3+ ion irradiation was conducted on Zircaloy-2 samples at room temperature. Thermal desorption spectroscopy is used to evaluate the deuterium desorption with and without Ni3+ ion irradiation. A conventional transmission electron microscope and a spherical aberration-corrected high-resolution analytical electron microscope are used to observe the microstructure. The experimental results indicate that radiation-induced dislocation loops and hydrides form in Zircaloy-2 and act as major trapping sites at lower (400–600C) and higher (700–900C)-temperature regions, respectively. These results show that the detailed microstructural changes related to the hydrogen pickup at the defect sinks formed by irradiation are necessary for the degradation of LWR fuel-cladding tubes during operation.

ジャーナルQuantum Beam Science
出版ステータス出版済み - 6 2021

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 原子分子物理学および光学


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