[1O06-10] Nuclear Materials 1

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)

[1O09] Development of ultra-high temperature in-situ observation technique for nuclear fuel(4) Analysis of transient state during Zr-Y2O3 test at high temperatures

*Ayumi Itoh¹, Tuyoshi Yaita⁴, Hajime Tanida⁴, Thoru Kobayashi⁴, Tatsuo Fukuda⁴, Masaaki Kobata⁴, Kenji Konashi², Yuji Arita³ (1. Tokyo Tech, 2. Tohoku Univ., 3. Fukui Univ., 4. JAEA)

Keywords:

XAFS-XRD,structual analysis,high-temperature Zr reaction

Structural change for temperature ranges from 300 K to above 2500 K was analyzed using the XAFS spectra and diffraction images taken by the in-situ high-temperature measurement system reported in Series 2 and 3. It was confirmed that metallic Zr was transformed to zirconia by residual oxygen inside the reactor, and YZrO solid solution formed by zirconia-yttria reaction above 2000 K. Consequently, we demonstrated that structural analysis at elevated temperatures is possible from the data obtained by the developed system.