Investigation of the chemical characteristics of individual radioactive microparticles emitted from reactor 1 by the Fukushima Daiichi Nuclear Power Plant accident by using multiple synchrotron radiation X-ray analyses

Ono, Takahiro*; Iizawa, Yushin*; Abe, Yoshinari*; Nakai, Izumi*; Terada, Yasuko*; Satou, Yukihiko; Sueki, Keisuke*; Adachi, Koji*; Igarashi, Yasuhito*

Bunseki Kagaku, 66(4), p.251 - 261, 2017/04

https://doi.org/10.2116/bunsekikagaku.66.251

no abstracts in English

Development of quick-response area-averaged void fraction meter; Application to BWR condition

Iguchi, Tadashi; Watanabe, Hironori; Kimura, Mamoru*; Anoda, Yoshinari

JAERI-Research 2001-032, 111 Pages, 2001/05

JAERI-Research-2001-032.pdf:4.14MB

no abstracts in English

Development of quick-responce area-averaged void fraction meter

Watanabe, Hironori; Iguchi, Tadashi; Kimura, Mamoru; Anoda, Yoshinari

JAERI-Research 2000-043, 77 Pages, 2000/11

JAERI-Research-2000-043.pdf:6.55MB

no abstracts in English

Experimental and analytical simulations of the Mihama Unit-2 steam generator tube rupture(SGTR) incident

Anoda, Yoshinari; Nakamura, Hideo; Watanabe, Tadashi; Hirano, Masashi; Kukita, Yutaka

Proc. of the 1993 Simulation Multiconference on the Int. Simulators Conf. ; SIMULATORS X, p.242 - 247, 1993/00

no abstracts in English

Void fractions under high-pressure boil-off conditions in rod bundle

; Kumamaru, Hiroshige; Watanabe, Tadashi; Anoda, Yoshinari; Kukita, Yutaka

ANS Proc. 1991 National Heat Transfer Conf., Vol. 5, p.225 - 232, 1991/00

no abstracts in English

Motion of bubbles in ultrasonic field

Anoda, Yoshinari; Watanabe, Tadashi; Kukita, Yutaka

Proc. of the Int. Conf. on Multiphase Flows 91-TSUKUBA,Vol. 1, p.397 - 400, 1991/00

no abstracts in English

Measuring of surface potential of radiocaesium-bearing microparticles by Kelvin Probe Force Microscopy

Kurosawa, Keiichi*; Iwata, Ayumu*; Satou, Yukihiko; Abe, Yoshinari*; Igarashi, Yasuhito*; Okuda, Tomoaki*

no journal, , 

The Fukushima Daiichi Nuclear Power Plant accident caused serious emission of radionuclides into the atmosphere. After several years, insoluble radiocaesium-bearing microparticles (CsMP) have been found in some regions in Japan. These insoluble solid particles remain as a particle in human airways and continue emitting radiation when they are inhaled. Therefore, these particles have a potentially significant adverse effect on human health. Because of the continuous emission of the -rays, which is energetic electron beam, previous studies reported that the radioactive particles would have specific electrostatic charging characteristics. Also, several laboratory experiments and numerical simulations have shown that the electrostatically charged particles are more deposited on the human respiratory airway. Therefore, the electrostatic charging characterization of the CsMP is important for the accurate evaluation of its health effects. In this study, we used Kelvin Probe Force Microscopy to measure the surface potential of CsMP. The obtained mapping image was shown that the radioactive particle has a certain distribution of surface potential ranged between +0.3 V and -0.3 V. This distribution of the surface potential within the particle may be associated with the distribution of radioactive Cs in the surface layer of the particle.