TY - JOUR
T1 - Formation of radioactive cesium microparticles originating from the Fukushima Daiichi Nuclear Power Plant accident
T2 - characteristics and perspectives
AU - Ohnuki, Toshihiko
AU - Satou, Yukihiko
AU - Utsunomiya, Satoshi
N1 - Funding Information:
The authors thank TEPCO, IRID, and JAEA for the use of their data released on the website [25]. This study was partly supported by a JSPS Grant-in-Aid for Challenging Research (Exploratory) [grant number 17K19086].
Funding Information:
The authors thank TEPCO, IRID, and JAEA for the use of their data released on the website [25]. This study was partly supported by a?JSPS Grant-in-Aid?for Challenging Research (Exploratory) [grant number 17K19086].
PY - 2019/10/3
Y1 - 2019/10/3
N2 - Following identification of radioactive Cs microparticles (CsMPs) in aerosol samples from the Fukushima Daiichi Nuclear Power Plant (FDNPP), numerous reports on CsMPs have been published. This paper reviews recent progress in the measurement and characterization of CsMPs by advanced analytical techniques, including advanced transmission electron microscopy (TEM) and synchrotron X-ray analysis. These analyses revealed that the CsMPs contained Si, Fe, Zn, Cs, and minor quantities of U together with some fission products. Uranium in the CsMPs was identified as being in the form of uraninite and (U,Zr)O2. Detailed advanced TEM analysis has clarified some of the processes resulting in the alteration of constituents of the nuclear fuels and containment vessel materials during this severe accident. In addition, a detailed report on the elemental compositions and structures of the fuel debris fragments collected inside and outside of the primary containment vessel25 highlighted the fact that the fuel debris fragments contained nanoparticles with the U and Zr components having similar structures to that of the CsMPs. This similarity in structures has stimulated further research on the structure and elemental constituents, especially for U and Zr in the CsMPs, and has opened up new avenues for studying the chemical characteristics of the fuel debris.
AB - Following identification of radioactive Cs microparticles (CsMPs) in aerosol samples from the Fukushima Daiichi Nuclear Power Plant (FDNPP), numerous reports on CsMPs have been published. This paper reviews recent progress in the measurement and characterization of CsMPs by advanced analytical techniques, including advanced transmission electron microscopy (TEM) and synchrotron X-ray analysis. These analyses revealed that the CsMPs contained Si, Fe, Zn, Cs, and minor quantities of U together with some fission products. Uranium in the CsMPs was identified as being in the form of uraninite and (U,Zr)O2. Detailed advanced TEM analysis has clarified some of the processes resulting in the alteration of constituents of the nuclear fuels and containment vessel materials during this severe accident. In addition, a detailed report on the elemental compositions and structures of the fuel debris fragments collected inside and outside of the primary containment vessel25 highlighted the fact that the fuel debris fragments contained nanoparticles with the U and Zr components having similar structures to that of the CsMPs. This similarity in structures has stimulated further research on the structure and elemental constituents, especially for U and Zr in the CsMPs, and has opened up new avenues for studying the chemical characteristics of the fuel debris.
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U2 - 10.1080/00223131.2019.1595767
DO - 10.1080/00223131.2019.1595767
M3 - Review article
AN - SCOPUS:85073064493
SN - 0022-3131
VL - 56
SP - 790
EP - 800
JO - journal of nuclear science and technology
JF - journal of nuclear science and technology
IS - 9-10
ER -