@article{oai:jaxa.repo.nii.ac.jp:00021796, author = {大石, 佑治 and 近藤, 俊樹 and 石川, 毅彦 and 岡田, 純平 and 渡邊, 勇基 and 牟田, 浩明 and 黒崎, 健 and 山中, 伸介 and Oishi, Yuji and Kondo, Toshiki and Ishikawa, Takehiko and Okada, Junpei T. and Watanbe, Yuki and Muta, Hiroaki and Kurosaki, Ken and Yamanaka, Shinsuke}, issue = {1}, journal = {International Journal of Microgravity Science and Application (IJMSA)}, month = {Jan}, note = {To understand behavior of molten core materials is an urgent issue to investigate the progression of a core meltdown accident in nuclear power plants. Zirconium (Zr) based alloys have been widely used as nuclear fuel claddings and structural materials in the nuclear power plants. Since the typical atmosphere during most accident scenarios is steam, Zr liquid containing significant amount of O (Zr-O liquid alloys) will be generated in the case of the core meltdown accident. In this study we aim to provide thermophysical properties of Zr-O liquid alloys. To avoid a difficulty in measurement due to high melting point and high reactivity of Zr liquid, electrostatic levitation technique was employed for the measurement. Zr-O alloys with nominal compositions of Zr(0.9)O(0.1) and Zr(0.8)O(0.2) were prepared from powder Zr and ZrO2 by solid-state reaction. The oxygen composition was evaluated by thermogravimetric analysis. The measured viscosities of Zr-O liquids are higher than those of Zr liquid (experimental) and ZrO2 liquid (calculated), which indicates that the composition-dependent viscosity may have maxima in Zr-O liquids., 形態: カラー図版あり, Accepted: 2018-01-09, Physical characteristics: Original contains color illustrations, 資料番号: DS1740409000}, pages = {350105-1--350105-5}, title = {Thermophysical Properties of Zr-O Liquid Alloys Measured by Electrostatic Levitation}, volume = {35}, year = {2018} }