Local structural analyses of the uranium and zirconium in fuel debris containing boron at 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.

Local structural analyses of the uranium and zirconium in fuel debris containing boron at 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.

Mixtures of UO2, ZrO2 and B4C, that are one possible phase of nuclear debris remaining in the damaged reactors at the Fukushima Dai-ichi Nuclear Power Plants, were prepared at high temperature between 1200 to 1600 C, and their solid state structure was characterised by X-ray absorption spectroscopy at both U LIII- and Zr K-edges, and powder X-ray diffraction. The data were further analysed by principal component analysis.

Keywords: Nuclear fuel debris; Fukushima Dai-ichi Nuclear Power Plants; solid state; characterisation; uranium; zirconium; boron; X-ray absorption spectroscopy; X-ray diffraction

Lecture (Conference)
2018 Fall Meeting, Atomic Energy Society of Japan, 05.09.2018, Okayama University, Japan

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