Development of ultramicro analysis technology for fuel debris analysis

Kenta Yoshida

Presentation information

Oral presentation

V. Nuclear Fuel Cycle and Nuclear Materials » 505-3 Decommissioning Technology of Nuclear Facilities

[2B01-05] Decommissioning of Fukushima Daiichi NPP 1

Thu. Sep 8, 2022 9:30 AM - 10:50 AM Room B (E1 Bildg.2F No.21)

Chair:Yukihiro IGUCHI(Univ. of Fukui)

10:00 AM - 10:15 AM

[2B03] Development of ultramicro analysis technology for fuel debris analysis

(11) Evaluation of grain boundary segregation in a simulated debris using AC-TEM

*Kenta Yoshida¹, Hotaka Miyata¹, Kenji Konashi¹, Yasuyoshi Nagai¹ (1. Tohoku Univ.)

Keywords:Simulated fuel debris, (Zr,U)O2, TEM

The distribution of Fe atoms in simulated fuel debris and the atomic structure of Fe clusters in the (U, Zr)O₂ grain boundary layer were investigated by nano-scale analytical microscopy using a spherical aberration-corrected transmission electron microscopy (AC-TEM) in order to contribute to estimation of temperature and oxygen atmosphere during fuel debris formation.