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Oral presentation

Long-term Uplift-denudation of the Japan Arc revealed by low-temperature thermochronology

Tagami, Takahiro*; Sueoka, Shigeru

no journal, , 

no abstracts in English

Oral presentation

Investigation of factors controlling dissolved $$^{137}$$Cs concentrations in Japanese rivers

Tsuji, Hideki*; Shin, M.*; Taniguchi, Keisuke*; Arai, Hirotsugu*; Kurihara, Momo*; Yasutaka, Tetsuo*; Kuramoto, Takayuki*; Nakanishi, Takahiro; Lee, S*; Shinano, Takuro*; et al.

no journal, , 

To predict the behavior of particulate and dissolved radiocesium ($$^{137}$$Cs) in river water, some soil and land use categories in the watershed should be considered because these may affect the dissolved $$^{137}$$Cs concentration. In this study, to investigate the factors that affect dissolved $$^{137}$$Cs concentrations in Japanese rivers, we measured dissolved $$^{137}$$Cs concentrations in 67 rivers under baseflow conditions 13-280 km from the Fukushima Daiichi Nuclear Power Plant in August and September 2017.

Oral presentation

Detailed intercomparison of atmospheric transport models using newly obtained concentration data of Cs-137 from the Fukushima Daiichi Nuclear Power Plant Accident

Yamazawa, Hiromi*; Sato, Yosuke*; Adachi, Shinichiro*; Takigawa, Masayuki*; Sekiyama, Tsuyoshi*; Kajino, Mizuo*; Terada, Hiroaki; Kondo, Hiroaki*; Uchida, Junya*; Goto, Daisuke*; et al.

no journal, , 

Cs-137 released from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident was conducted by 12 models. The present study focuses on differences in the model results of atmospheric Cs-137 concentration of Plume 2, which traveled southward in the morning of 15 March, 2011, in the area 100 to 200 km downwind from FDNPP by using the concentration data recently evaluated from gamma radiation spectral data at monitoring stations (MS data) and those measured from the suspended particulate matter filters (SPM data). Comparison was made from the following aspects: (1) plume arrival time, (2) concentration level, (3) cross-wind surface concentration profile, (4) vertical concentration profile and (5) mass balance of Cs-137 activity including deposition processes. Additional analyses were made also for Plume 4, which traveled over the same area on 16 March under rainy condition.

Oral presentation

Studies for environmental impact of released radioactive materials under their mitigation measures in both inside and outside FDNPP harbor area using a nested CFD simulation code

Yamada, Susumu; Machida, Masahiko

no journal, , 

no abstracts in English

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