The session gathers geoscientific aspects such as dynamics, reactions, and environmental/health consequences of radioactive materials that are massively released accidentally (e.g., Fukushima and Chernobyl nuclear power plant accidents, wide fires, etc.) and by other human activities (e.g., nuclear tests).

The radioactive materials are known as polluting materials that are hazardous for human society, but are also ideal markers in understanding dynamics and chemical/biological/electrical reactions chains in the environment. Thus, the radioactive contamination problem is multi-disciplinary. In fact this topic involves regional and global transport and local reactions of radioactive materials through atmosphere, soil and water system, ocean, and organic and ecosystem, and its relation with human and non-human biota. The topic also involves hazard prediction and nowcast technology.

By combining >30 year (halftime of Cesium 137) monitoring data after the Chernobyl Accident in 1986, >5 year dense measurement data by the most advanced instrumentation after the Fukushima Accident in 2011, and other events, we can improve our knowledgebase on the environmental behavior of radioactive materials and its environmental/biological impact. This should lead to improved monitoring systems in the future including emergency response systems, acute sampling/measurement methodology, and remediation schemes for any future nuclear accidents.

The following specific topics have traditionally been discussed:
(a) Atmospheric Science (emissions, transport, deposition, pollution);
(b) Hydrology (transport in surface and ground water system, soil-water interactions);
(c) Oceanology (transport, bio-system interaction);
(d) Soil System (transport, chemical interaction, transfer to organic system);
(e) Forestry;
(f) Natural Hazards (warning systems, health risk assessments, geophysical variability);
(g) Measurement Techniques (instrumentation, multipoint data measurements);
(h) Ecosystems (migration/decay of radionuclides).

The session consists of updated observations, new theoretical developments including simulations, and improved methods or tools which could improve observation and prediction capabilities during eventual future nuclear emergencies. New evaluations of existing tools, past nuclear contamination events and other data sets also welcome.

Public information:
The release of radioactive materials by human activity (such as nuclear accidents) are both severe hazard problem as well as ideal markers in understanding geoscience at all level of the Earth because it cycles through atmosphere, soil, plant, water system, ocean, and lives. Therefore, we must gather knowledge from all geoscience field for comprehensive understanding.

Co-organized as GI2.7/AS4.43/BG1.39/ERE5.6/GMPV6.4/HS11.65/NH8.7/OS4.33/SSS8.7
Convener: Masatoshi Yamauchi | Co-conveners: Nikolaos Evangeliou, Yasunori Igarashi, Liudmila Kolmykova, Daisuke Tsumune
| Mon, 08 Apr, 14:00–15:45
Room N1
| Attendance Mon, 08 Apr, 16:15–18:00
Hall X1

Attendance time: Monday, 8 April 2019, 16:15–18:00 | Hall X1

Chairperson: Yamauchi, Tsumune
X1.29 |
Hikaru Miura, Yuichi Kurihara, Masayoshi Yamamoto, Aya Sakaguchi, Noriko Yamaguchi, Shogo Higaki, and Yoshio Takahashi
X1.32 |
Borisov Alexander, Linnik Vitaly, Mironenko Iya, Sokolov Alexander, and Saveliev Anatoly
X1.34 |
Validating and identifying parameters of a sorption model alternative to the Kd approach: Case of a mixed equilibrium and kinetics model with saturation for 137Cs sorption
Hamza Chaif, Arnaud Martin-Garin, François Lafolie, and Laurent Garcia-Sanchez
X1.35 |
Zul Hilmi Saidin, Yuichi Onda, Hiroaki Kato, Momo Kurihara, Kazuki Nanko, and Delphis F. Levia
X1.37 |
Alpha track detection from Non-nuclear industrial waste samples.
Hemlata Bagla and Sushma Chavan
X1.38 |
Hideki Tsuji, Moono Shin, Keisuke Taniguchi, Hirotsugu Arai, Momo Kurihara, Tetsuo Yasutaka, Takayuki Kuramoto, Takahiro Nakanishi, Sangyoon Lee, Takuro Shinano, Yuichi Onda, and Seiji Hayashi
X1.39 |
Yuichi Onda, Xiang Gao, Keisuke Taniguchi, Momo Kurihara, Chen Tang, and Yukio Takeuchi
X1.40 |
Yoshifumi Wakiyama, Yasunori Igarashi, Yuichi Onda, Junko Takahashi, Dmitry Samoilov, Sergii Obrizan, Hlib Lisovyi, Gennady Laptev, Alexei Konoplev, Hirofumi Tsukada, and Kenji Nanba
X1.41 |
Daisuke Tsumune, Takaki Tsubono, Kazuhiro Misumi, Yutaka Tateda, Yasushi Toyoda, Yuichi Onda, and Michio Aoyama