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Journal Articles

$$^{137}$$Cs concentrations in foliose lichens within Tsukuba-city as a reflection of radioactive fallout from the Fukushima Dai-ichi Nuclear Power Plant accident

Omura, Yoshihito*; Matsukura, Kimiyo*; Abe, Junichi*; Hosaka, Kentaro*; Tamaoki, Masanori*; Dohi, Terumi; Kakishima, Makoto*; Seaward, M. R. D.*

Journal of Environmental Radioactivity, 141, p.38 - 43, 2015/03

 Times Cited Count:6 Percentile:73.02(Environmental Sciences)

$$^{137}$$Cs concentrations in ten species of foliose lichens collected within Tsukuba-city in August 2013 ranged from 1.7 to 35 kBq/kg. The relationships between $$^{137}$$Cs in two dominant species, Dirinaria applanata and Physcia orientalis, and the air dose rate ($$mu$$Sv/h) at the sampling sites were investigated. $$^{137}$$Cs in P. orientalis measured about 1 year after the Fukushima nuclear accident was correlated (r$$^{2}$$=0.80) more closely with the air dose rate than those measured after about 2 years (r$$^{2}$$=0.65), possibly demonstrating its continued value as a biomonitor to reflect ambient fall-out levels. In contrast, those of Dirinaria applanata were not correlated with the air dose rate in either year.

Journal Articles

Underground research laboratories in Japan; What are the important factors for facilities design?

Sato, Toshinori; Mikake, Shinichiro; Sakamaki, Masanori; Aoki, Kazuhiro; Yamasaki, Shinichi; Shigeta, Naotaka; Takeda, Seietsu

9th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM '03), p.1333 - 1339, 2003/00

This paper shows current status of Mizunami Underground Research Laboratory, especially design and construction plan of underground facility.

Journal Articles

Evaluation of Carburization and Decarburization Behavior of Fe-9Cr-Mo Ferritic Steels in Sodium Environment

Ito, Takushi; Kato, Shoichi; Aoki, Masanori; Yoshida, Hidekazu; Kobayashi, Toshimi; Wada, Yusaku

Journal of Nuclear Science and Technology, 29(4), p.367 - 377, 1992/04

None

Oral presentation

Characteristics of mutations induced by carbon ions with different LETs in Arabidopsis

Hase, Yoshihiro; Yoshihara, Ryohei; Nozawa, Shigeki; Tamaoki, Masanori*; Narumi, Issei

no journal, , 

no abstracts in English

Oral presentation

Status of MOX fuel development for the FBR system in JAEA

Ojima, Hisao; Ito, Masanori; Takahashi, Saburo; Asakura, Koichi; Aoki, Yoshikazu

no journal, , 

no abstracts in English

Oral presentation

Analysis of HR frequencies in the plants grown in radioactive soil

Tamaoki, Masanori*; Sakamoto, Ayako; Endo, Masaki*; Toki, Seiichi*

no journal, , 

no abstracts in English

Oral presentation

Estimation of dose reduction factor before and after decontamination

Ishizaki, Azusa; Mori, Airi; Kawase, Keiichi; Kato, Mitsugu; Watanabe, Masanori; Aoki, Isao; Munakata, Masahiro

no journal, , 

Oral presentation

Effects on environmental dynamics of radiocesium related to the wildfire in mountainous forest of the Abukuma Mountains, Fukushima

Niizato, Tadafumi; Sasaki, Yoshito; Watanabe, Takayoshi; Mitachi, Katsuaki*; Ito, Satomi; Kuramoto, Takayuki*; Arai, Hirotsugu*; Nomura, Naoki*; Hayashi, Seiji*; Tamaoki, Masanori*

no journal, , 

$$^{137}$$Cs released from the TEPCO's Fukushima Dai-ichi Nuclear Power Plant accident has a long half-life of about 30 years, it is necessary to monitor the distribution and its radioecological impact over the long term. Mountainous forests, which accounts for about 70% of Fukushima prefecture, tend to be a sink of radiocesium contamination rather than a source for the contamination of other ecosystems. An understanding of the environmental dynamics of radiocesium in the forest floor of various conditions is important issue, while progressing to the resident return. In this paper, we report on the results of the field investigation into the $$^{137}$$Cs distribution and the $$^{137}$$Cs outflow in the mountainous forest of Fukushima, where the wildfire broke out in the spring of 2017.

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