Status of study of long-term assessment of transport of radioactive contaminants in the environment of Fukushima (FY2018) (Translated document)

Nagao, Fumiya; Niizato, Tadafumi; Sasaki, Yoshito; Ito, Satomi; Watanabe, Takayoshi; Dohi, Terumi; Nakanishi, Takahiro; Sakuma, Kazuyuki; Hagiwara, Hiroki; Funaki, Hironori; et al.

JAEA-Research 2020-007, 249 Pages, 2020/10

JAEA-Research-2020-007.pdf:15.83MB

The accident of the Fukushima Daiichi Nuclear Power Station, Tokyo Electric Power Company Holdings, Inc. occurred due to the Great East Japan Earthquake, Sanriku offshore earthquake, of 9.0 magnitude and the accompanying tsunami. As a result, large amount of radioactive materials was released into the environment. Under these circumstances, Japan Atomic Energy Agency (JAEA) has been conducting "Long-term Assessment of Transport of Radioactive Contaminants in the Environment of Fukushima" concerning radioactive materials released in environment, especially migration behavior of radioactive cesium since November 2012. This report is a summary of the research results that have been obtained in environmental dynamics research conducted by JAEA in Fukushima Prefecture.

Temporal change of radiocesium loss in a decontaminated deciduous broad-leaved forest

Watanabe, Takayoshi; Sasaki, Yoshito; Niizato, Tadafumi; Mitachi, Katsuaki*; Ito, Satomi

KEK Proceedings 2019-2, p.114 - 119, 2019/11

no abstracts in English

Proton-exchange mechanism of specific Cs adsorption lattice defect sites of Prussian blue filled with coordination and crystallization water molecules

Ishizaki, Manabu*; Akiba, Sae*; Otani, Asako*; Hoshi, Yuji*; Ono, Kenta*; Matsuba, Mayu*; Togashi, Takanari*; Kanaizuka, Katsuhiko*; Sakamoto, Masatomi*; Takahashi, Akira*; et al.

Dalton Transactions, 42(45), p.16049 - 16055, 2013/12

https://doi.org/10.1039/c3dt51637g

We have revealed the fundamental mechanism of specific Cs adsorption into Prussian blue (PB) in order to develop high-performance PB-based Cs adsorbents in the wake of the Fukushima nuclear accident. We compared two types of PB nanoparticles with formulae of Fe[Fe(CN)]3xHO (x = 10-15) (PB-1) and (NH)0.70Fe1.10[Fe(CN)]1.7HO (PB-2) with respect to the Cs adsorption ability. The synthesised PB-1, by a common stoichiometric aqueous reaction between 4Fe and 3[Fe(CN)], showed much more efficient Cs adsorption ability than did the commercially available PB-2.

Production of no-carrier-added Cu and applications to molecular imaging by PET and PETIS as a biomedical tracer

Watanabe, Shigeki; Iida, Yasuhiko*; Suzui, Nobuo; Katabuchi, Tatsuya*; Ishii, Satomi; Kawachi, Naoki; Hanaoka, Hirofumi*; Watanabe, Satoshi; Matsuhashi, Shimpei; Endo, Keigo*; et al.

Journal of Radioanalytical and Nuclear Chemistry, 280(1), p.199 - 205, 2009/04

https://doi.org/10.1007/s10967-008-7443-9

Quality control in Positron Emitting Tracer Imaging System (PETIS) examination for quantification analysis of plant physiological functions

Kawachi, Naoki; Fujimaki, Shu; Suzui, Nobuo; Ishii, Satomi; Watanabe, Shigeki; Watanabe, Satoshi; Ishioka, Noriko; Matsuhashi, Shimpei

JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 107, 2008/11

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2008-055.pdf

Ion beam breeding of flower color variations in transgenic plants with multi-disease tolerance

Okamura, Masachika*; Shimizu, Akira*; Watanabe, Satomi*; Hase, Yoshihiro; Narumi, Issei; Tanaka, Atsushi

JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 82, 2008/03

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2007-060.pdf

no abstracts in English

Breeding of stress-tolerant variety series in ornamentals by ion beam irradiation

Okamura, Masachika*; Momose, Masayuki*; Watanabe, Satomi*; Shimizu, Akira*; Hase, Yoshihiro; Yokota, Yuichiro; Tanaka, Atsushi

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 82, 2007/02

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2006-042.pdf

no abstracts in English

Studies of plant biology using PETIS (Positron Emitting Tracer Imaging System)

Fujimaki, Shu; Kawachi, Naoki; Ishioka, Noriko; Watanabe, Satoshi; Sakamoto, Koichi; Suzui, Nobuo; Ishii, Satomi; Matsuhashi, Shimpei

no journal, , 

no abstracts in English

Kinetic analysis of positron-emitting tracer for studying plant physiology using the Positron Emitting Tracer Imaging System (PETIS)

Kawachi, Naoki; Fujimaki, Shu; Suzui, Nobuo; Ishii, Satomi; Tsukamoto, Takashi; Ishioka, Noriko; Watanabe, Satoshi; Matsuhashi, Shimpei

no journal, , 

no abstracts in English

Molecular imaging for plant physiology, 2; Multi-tracer imaging system for the dynamics of nutrients and pollutants in intact plants

Kawachi, Naoki; Fujimaki, Shu; Suzui, Nobuo; Ishii, Satomi; Matsuhashi, Shimpei; Sato, Takahiro; Watanabe, Shin*; Takeda, Shinichiro*; Takahashi, Tadayuki*

no journal, , 

We have developed prototype of the multi-element imaging system for plant study using CdTe semiconductor detector, which has high-energy resolution. The feasibility of this system for -ray emission imaging of radioactive multi-nuclide tracer was examined by imaging experiment with a plant. The distribution of the two sample tracers, technetium and thallium, fed to a tobacco plant was successfully visualized for each nuclide simultaneously. The presented imaging method will yield plant molecular imaging, which visualizes dynamics of some competitive elements in intact plant, non-invasively and quantitatively.