7th Asia-Pacific Symposium on Radiochemistry 2025
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Session Details

Poster Presentation[R7]Environmental Radiochemistry

[Poster]R7

Mon. Sep 15, 2025 6:30 PM - 8:00 PM JST
Mon. Sep 15, 2025 9:30 AM - 11:00 AM UTC
Poster

[P-R7-01]Study on Activity of Cesium-137 in the Coastal and Offshore Waters of Taiwan

*chun hao Chen1, Jian Wei You1, Liang Yu Tao1, Wan Ling Chen1 (1. Radiation Monitoring Center (Taiwan))

[P-R7-02]Study on the Activity of Cesium-137 in Surface Soils of Taiwan

*Jian-Wei You1, Hui-I Lo1, Wan-Ling Chen1 (1. Radiation Monitoring Center, Nuclear Safety Commission. (Taiwan))

[P-R7-03]Research on the environmental behavior of radionuclides released from Rokkasho reprocessing plant at IES

*Shinji Ueda1, Hidenao Hasegawa1, Hideki Kakiuchi1, Yoshihito Ohtsuka1, Koichi Abe1 (1. Institute for Environmental Sciences (Japan))

[P-R7-04]Measurements of hydrogen deposition velocities of forest soil by using D2 gas

*Masaru Nagai1, Hideki Kakiuchi1, Tsuyoshi Masuda1 (1. Institute for Environmental Sciences (Japan))

[P-R7-05]Spatial transports of 7Be and 22Na from the Arctic to the Sea of Japan side of Honshu, Japan.

*Keisuke Yoshida1, Masayuki Umeda1, Masahiro Yamashita1, Masanao Nakano1, Mutsuo Inoue2 (1. Japan Atomic Energy Agency (Japan), 2. Kanazawa University (Japan))

[P-R7-06]Trends of 129I/127I ratios and I-129 concentrationsfor environmental samples of Japan

*Sota Nagaoka1, Noeru Kato1, Xiaoshui Wang1, Wataru Nitta1 (1. Japan Chemical Analysis Center (Japan))

[P-R7-07]Radon Concentration Measurement in Water Samples using Plastic scintillator pellets: Evaluation of Efficiency and Detection Limit

*Masahiro Hirota1, Koichi Sakakibara2, Kazuki Sawahata3, Yuka Kato3 (1. Research Center for Advanced Science and Technology, Shinshu University (Japan), 2. Faculty of Science, Shinshu University (Japan), 3. ALOKA Co., Ltd. (Japan))

[P-R7-08]Experimental method for estimation of 210Pb gamma-ray attenuation in sediment sample using 241Am point source

*Haifeng Shen1, Satoru Miyata1, Katsuyuki Suzuki1, Wataru Nitta1, Yuji Ohta1, Hidesuke Itadzu2 (1. Japan Chemical Analysis Center (Japan), 2. SEIKO EG&G CO.,LTD (Japan))

[P-R7-09]Biological Tritium Analysis in Taiwan

HuanChing Huang1, HueiWen Tsai1, PingJi Huang1, *WanJyun Wei1 (1. National Atomic Research Institute (Taiwan))

[P-R7-10*]DISTRIBUTION OF 137Cs, 90Sr AND ACTIVITY RATIO OF 90Sr/137Cs IN SOIL AROUND FDNPP

*Riku Kawase1, Kazuhiko Ninomiya2, Takashi Yoshimura1 (1. The University of Osaka (Japan), 2. Hiroshima University (Japan))

[P-R7-11]Spatiotemporal variations of 134Cs and 228Ra concentrations of surface waters in the off-Doto area (2018-2025)

*Ryoma Arakaki1, Kaisei Mashita1, Mutsuo Inoue1, Yukiko Taniuchi2, Takuya Nakanowatari2, Seiya Nagao1 (1. Kanazawa University (Japan), 2. Japan Fisheries Research and Education Agency (Japan))

[P-R7-12]EFFECT OF ENVIRONMENTAL CONDITIONS ON STRONTIUM ADSORPTION OF FLUVO-AQUIC SOIL COLLOIDS

*Lingling Ma1, Yang Shao1 (1. Institute of High Energy Physics, Chinese Academy of Sciences, (China))

[P-R7-13]Spatiotemporal variation of FDNPP-derived 137Cs in/around the Bering Sea

*Daichi Koshiishi1 (1. Kanazawa university (Japan))

[P-R7-14]RADIOCARBON DATING OF VERDIGRIS ON THE BRONZE FITTINGS ATTACHED TO THE RAFTERS OF THE MAIN HALL, IZUMO TAISHA SHRINE

*Hirotaka Oda1, Tetsuya Yamada2, Tsukamoto Toshio2 (1. ISEE, Nagoya Univ. (Japan), 2. Gangoji Institute Res. Cultural Property (Japan))

[P-R7-15]A preliminary study- minute-level analysis of environmental gamma dose rate and precipitation

Wei-Min Li1, *Chi-Wen Hsieh1, Chuan-Pin Lee2,3, Yu-Jie Li4, Chun-Yi Fang4, Wei-Hsiang Tseng1, Yu-Cheng Tsai 1 (1. Department of Electrical Engineering, National Chung Cheng University (Taiwan), 2. Center for Energy and Environmental Research, National Tsing Hua University, Hsinchu City 300044, Taiwan (Taiwan), 3. Radioactive Waste Disposal Technology Research and Development Center, National Tsing Hua University, Hsinchu City 300044, Taiwan (Taiwan), 4. Radiation Monitoring Center, Nuclear Safety Commission, Kaohsiung City 833172, Taiwan (Taiwan))

[P-R7-16*]Measurement of Radioactive Cesium Transfer Factors from Fukushima-Contaminated Soil to Plants

*Yuzuha Mimura1, Kazuki Daikoku1, Ayuto Kato2, Mai Kondo2, Sawa Ishikawa1, Mizuki Sumihama3, Takashi Saito4, Haruki Minowa5, Hiroaki Tanigawa1, Miki Tanigawa1, Michio Okada1 (1. Osaka University (Japan), 2. Gifu University (Japan), 3. Osaka University / Gifu University (Japan), 4. Shokei Gakuin University (Japan), 5. Jikei University. Sch. Med. (Japan))

[P-R7-17]A comparison between wet-only and total deposition of 137Cs observed in Namie Town, Fukushima Prefecture, Japan

*Hidenao Hasegawa1, Yoshihito Ohtsuka1, Naofumi Akata2, Shinji Ueda1, Shinji Tokonami2 (1. Institute for Environmental Sciences (Japan), 2. Hirosaki University (Japan))

[P-R7-18]Synergistic Coordination-Reduction Interface for Electrochemical Reduction Extraction of Low-Impurity Uranium from Seawater

*Huanhuan Liu1, Wenkun Zhu1 (1. Southwest university of science and technology (China))

[P-R7-19]Self-Absorption Correction Method Validation for Pb-210 quantification using Gamma Spectrometry

*Dante Nakazawa1, Shigekazu Hirao2, Kunihiro Sakai1, Atsuo Suzuki1 (1. Mirion Technologies (Canberra) KK (Japan), 2. Institute of Environmental Radioactivity at Fukushima University (Japan))

[P-R7-20]Temporal changes of 3H and 129I in seawater collected at mooring buoy near the marine discharge outlet of the Rokkasho Reprocessing Plant

*Hisaki Kofuji1, Shinichi Gasa1, Natsuko Akihama1 (1. Japan Marine Science Foundation (Japan))

[P-R7-21*]Depth-Dependent Measurement of Radioactive Cesium Activity Concentration in a 30 cm Soil Core from Fukushima

*Kazuki Daikoku2, Mizuki Sumihama2,3, Haruka Minowa4, Yuzuha Mimura2, Takeshi Saito1, Sawa Ishikawa2, Mai Kondo3, Ayuto Kato3, Michio Okada2 (1. Shokei Gakuin University (Japan), 2. The University of Osaka (Japan), 3. Gifu University (Japan), 4. Jikei Univ. Sch. Med. (Japan))

[P-R7-22]Efficient Photoassisted Uranium Recovery from Fluorine-Containing Wastewater by Ag/WO3−x with Surface Defect and Heterostructure

*Jia Lei1, Duo Zhang2, Shuao Wang2 (1. Southwest University of Science and Technology (China), 2. Soochow University (China))

[P-R7-23*]Density of Radioactive Cesium-Rich Microparticles in Contaminated Soils

*Koyo Takeuchi1, Shinya Yamasaki1, Satoshi Utsunomiya2, Yuichi Takaku1, Keisuke Sueki1, Yudai Shigekawa1, Aya Sakaguchi1 (1. University of Tsukuba (Japan), 2. Kyusyu University (Japan))

[P-R7-24*]Evaluation of the ability of Saccharomyces cerevisiae to reduce U(VI) by anaerobic respiration

*IORI YAMAMOTO1, Shinya Yamasaki1, Yuichi Takaku1, Yudai Shigekawa1, Aya Sakaguchi1, Keisuke Sueki1 (1. University Of Tsukuba (Japan))

[P-R7-25]Measured and theoretical gamma air dose rates in archived soil samples collected in Japan

*Keiko Tagami1, Shigeo Uchida1 (1. National Institutes for Quantum Science and Technology (Japan))

[P-R7-26]TRITIUM CONCENTRATION IN NATURAL WATER SAMPLES COLLECTED AT TOMIOKA TOWN LOCATED NEARBY FDNPP

*Naofumi Akata1, Haruka Kuwata1, Khemruthai Kheamsiri1, Rosianna Ilsa1, Yuisa Kitayama1, Honoka Fukuda1, Ryohei Yamada1, William James Stephenson1,2, Yasuyuki Taira3, Hideki Saito4, Noriyuki Takizawa4 (1. Hirosaki University (Japan), 2. Colorado State University (United States of America), 3. Nagasaki International University (Japan), 4. Tomioka Town Hall (Japan))

[P-R7-27*]DGT application to study dynamic speciation of
uranium in moderately basic environments

*Adrien Constandache1, Takumi Saito2 (1. Department of Nuclear Engineering and Management, School of Engineering, the University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan), 2. Nuclear Professional School, School of Engineering, the University of Tokyo, 2-22 Shirakata-Shirane, Tokai-mura, Ibaraki 219-1188 (Japan))

[P-R7-28]Vertical distribution of 129I, 137Cs, 3H and 36Cl in unsaturated zone observed at Koriyama, Japan

*Tomoko Ohta1, Keith Fifield2, László Palcus3, Stephen G. Tims2, Stefan Pavetich2, Hiroyuki Matsuzaki4, Daisuke Tsumune5,6, Hiroshi Hayami6, Yasunori Mahara7 (1. Nagaoka University of Technology (Japan), 2. The Australian National University (Australia), 3. HUN-REN Institute for Nuclear Research (Hungary), 4. The University of Tokyo (Japan), 5. Tsukuba University (Japan), 6. Waseda University (Japan), 7. Kyoto University (Japan))

[P-R7-29]Radioactivity of Sulfurous Sinter Deposit from Beitou Hot Spring.

*Takashi Saito1, Yuto Takahashi1, Taiga Kaseda2, Hibiki Shirata2, Toru Takahashi2, Shunsuke Hashizume2, Yuya Koike3, Mototaka Nakamura4 (1. Shokei Gakuin University (Japan), 2. Graduate School of Science and Technology, Meiji University (Japan), 3. Meiji University (Japan), 4. Study of European Radon-spa Therapy (Japan))

[P-R7-30*]Efficient Tritium Enrichment via Direct Seawater Electrolysis: Achieving High Separation Factor and Recovery in a Low-Volume System

*CHIH-YI LAI1, Mariel Gonzales Tecson1, Liang-Yu Tao2, Chun-Hu Chen1 (1. National Sun Yat-sen University (NSYSU) (Taiwan), 2. Radiation Monitoring Center, Nuclear Safety Commission (Taiwan))

[P-R7-31*]TRACING RADIONUCLIDES IN THE MARINE ENVIRONMENT USING THE NEW ”MILEA” ACCELERATOR MASS SPECTROMETRY FACILITY, REZ, CZECH REPUBLIC

*Petros Leivadaros1, Ole Christian Lind2, Hilde Elise Heldal3, Christos Tsabaris4 (1. Czech Technical University in Prague (Czech Republic), 2. Norwegian University of Life Sciences (Norway), 3. Institute of Marine Research (Norway), 4. Hellenic Centre for Marine Research (Greece))

[P-R7-32]NATURAL RADIOACTIVITY AND RADON INTENSITY IN DIFFERENT TYPES OF ROCK SPECIES AND SOIL IN KOREA

*Kilyong Lee1, Sungwon Kim2, Minyong Park1, Sang-Ok Lee3, Seung Hwan Lee2, Jung-Ki Shin1, Seongjae Jeong1, Jaeseung Heo1, Seonghun Choi1, Sangyong Kim1 (1. Neosiskorea Co., Ltd (Korea), 2. Korea Institute of Geoscience and Mineral Resources (Korea), 3. Korea National University of Heritage (Korea))
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