2009年3月
Recovery and restructuring induced by fission energy ions in high burnup nuclear fuel
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
- 巻
- 267
- 号
- 6
- 開始ページ
- 960
- 終了ページ
- 963
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.nimb.2009.02.022
In light water commercial reactors, extensive change of grain structure was found at high burnup ceramic fuels. The mechanism is driven by bombardment of fission energy fragments and studies were conducted by combining accelerator based experiments and computer-science. Specimen of CeO2 was used as simulation material of fuel ceramics. With swift heavy ion (Xe) irradiation on CeO2, with 210 MeV, change of valence charge and lattice deviation of cations were observed by XPS and XRD. Combined irradiations of Xe implantation and swift heavy ion irradiation successfully produced sub-micrometer sized sub-grains, similar as that observed in commercial fuels. Studying components of mechanism scenarios, with first principle calculations using the VASP code, we found stable hyper-stoichiometric defect structures of UO2+x. Molecular dynamics studies revealed stability of Xe planar defects and also found rapid transport mode of oxygen-vacancy clusters. © 2009.
- リンク情報
- ID情報
-
- DOI : 10.1016/j.nimb.2009.02.022
- ISSN : 0168-583X
- SCOPUS ID : 69749107116