Local structural analyses of the mixed uranium-zirconium oxides in fuel debris simulated for the Fukushima Daiichi NPP accident


Local structural analyses of the mixed uranium-zirconium oxides in fuel debris simulated for the Fukushima Daiichi NPP accident

Uehara, A.; Akiyama, D.; Numako, C.; Takeda, S.; Ikeda-Ohno, A.; Terada, Y.; Nitta, K.; Ina, T.; Kirishima, A.; Sato, N.

A series of the mixed uranium-zirconium oxides was prepared at high temperature to simulate the nuclear fuel debris remaining in the nuclear reactor(s) of Fukushima Daiichi Nuclear Power Plant (FDNPP), Japan. The prepared samples were comprehensively characterised by powder X-ray diffraction and X-ray absorption spectroscopy, indicating that the major phases formed are UO2, U3O8 and ZrO2 with an additional formation of mixed U-Ze oxide phases.

Keywords: Nuclear fuel debris; FDNPP; uranium; zirconium; oxide; solid solution; powder X-ray diffraction; X-ray absorption spectroscopy; speciation; characterisation

  • Lecture (Conference)
    Annual Meeting of the Atomic Energy Society of Japan, 26.-28.03.2018, Osaka University, Japan

Permalink: https://www.hzdr.de/publications/Publ-26553
Publ.-Id: 26553