An investigation of physical properties of melts at high temperatures by ultra-high-temperature pulse heating method

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04938
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 31010:Nuclear engineering-related
• Research Institution: University of Fukui
• Principal Investigator: ARITA YUJI 福井大学, 附属国際原子力工学研究所, 教授 (50262879)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 高温物性 / 熱容量

Outline of Final Research Achievements

It is developed a method for measuring the thermophysical properties of oxide melts at temperatures above 2000°C using a pulse heating method. Using stabilized zirconia, heat capacity measurements at high temperatures below the sample melting temperature were found to be stable, although the values tended to be skewed toward higher values. However, due to the influence of changes in sample position caused by sample melting, measurements above the melting point showed a large scatter. We have obtained a prospect for stable measurement if we can modify the apparatus to enable measurement at a location less affected by changes in sample position.

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Free Research Field

原子力材料、高温物性

Academic Significance and Societal Importance of the Research Achievements

直接測定が難しい2000℃以上の高温での熱容量測定ができれば高温状態に置かれる材料の挙動評価に活用できる。特に、原子力分野では酸化物燃料の事故時の挙動解析に応用することで福島第一原子力発電所の事故時の様子を推定する際の重要なデータとなると共に、今後開発される新型燃料の安定性評価に活用することで安全性向上につながる。