Institute for Environmental Sciences
International Symposium on
Environmental Dynamics of Radionuclides
and Biological Effects of Low Dose-Rate Radiation
September 27-29, 2021
Aomori, JAPANVirtual Meeting
PROGRAMDay 1: September 27 (Mon)
OPENING CEREMONY
13:00-13:20 JST (7:00- EEST | 6:00- CEST | 23:00- (Sun, Sept 26) CDT)
Welcome Address

Yoshiya SHIMADA, President, IES

Greetings from the Sponsor
Aomori Prefectural Government

Congratulatory Addresses
Ministry of Education, Culture, Sports, Science and Technology Japan (MEXT)

Rokkasho Village Government

ENVIRONMENTAL DYNAMICS of RADIONUCLIDES
Special Lecture 1

13:20-13:50 JST (7:20- EEST | 6:20- CEST | 23:20- (Sun, Sept 26) CDT)
Chair: Kimiaki SAITO (JAEA, Japan)

Tritium in the Environment
Noriyuki MOMOSHIMA(Kyushu University, Professor Emeritus, and President of Kyushu Environmental
Evaluation Association, Japan)
Special Lecture 2

13:50-14:20 JST (7:50- EEST | 6:50- CEST | 23:50- CDT)
Chair: Takeshi IIMOTO (The University of Tokyo)

Fukushima 137Cs Re-suspension: Biological Processes
Yasuhito IGARASHI(Kyoto University, Japan)
Break 14:20-14:40 JST (8:20- EEST | 7:20- CEST | 0:20- (Mon, Sept 27) CDT)

Session 1A

Environmental Effects 1

14:40-15:40 JST (8:40- EEST | 7:40- CEST | 0:40- CDT)
Chair: Hiroaki TERADA (JAEA, Japan)

S1A-1 Long-Range Transport of Rn-222 in Eastern Asian and Deposition of Its Progenies inJapan
Hiromi YAMAZAWA (Nagoya University, Japan)
S1A-2 JAEA’s Modeling Studies on Radionuclides Transport in the Terrestrial
Environment
Masakazu OTA (JAEA, Japan)
S1A-3 10-year Oceanic Simulation of 137Cs Derived from the Fukushima Dai-ichi Nuclear
Power Plant Accident
Daisuke TSUMUNE (CRIEPI, Japan)Break 15:40-16:00 JST (9:40- EEST | 8:40- CEST | 1:40- CDT)

Session 1B

Environmental Effects 2

16:00-17:00 JST (10:00- EEST | 9:00- CEST | 2:00- CDT)
Chair: Yuichi ONDA (University of Tsukuba, Japan)

S1B-1

Derivation of Soil-to-Crop Transfer Factor of Carbon-14 by Using Stable Carbon
Isotope Ratios
Keiko TAGAMI (QST, Japan)

S1B-2 Temporal Variation of Cs-134 and Cs-137 Radioactivity in Waters from Natsui andSame Rivers in South Fukushima Prefecture in Japan
Seiya NAGAO (Kanazawa University, Japan)
S1B-3 Research on the Environmental Effects of Radionuclides at IES - An Overview
Satoshi YOSHIDA (Department of Radioecology, IES, Japan)
Poster Exhibition / Viewing on website (No oral presentation)
Questions for Poster presenters will be accepted until 17:00 on September 28 (Tuesday).
Answers to Questions may be posted by the presenters until 12:00 on September 29(Wednesday).

Day 2: September 28 (Tue)BIOLOGICAL EFFECTS of LOW DOSE-RATE RADIATION
Special Lecture 3

8:30-9:00 JST (2:30- EEST | 1:30- CEST | 18:30- (Mon, Sept 27) CDT)
Chair: Jun’ichiro KOMURA (Department of Radiobiology, IES, Japan)

Effects of Low Dose and Low Dose Rate Radiation on Animals
Gayle WOLOSCHAK (Northwestern University, USA)Special Lecture 4

9:00-9:30 JST (3:00- EEST | 2:00- CEST | 19:00- CDT)
Chair: Jun’ichiro KOMURA (Department of Radiobiology, IES, Japan)

Detection of Transgenerational Genetic Effects Based on Whole Genome Sequencing
in the mouse model
Yoichi GONDO (Tokai University, Japan)
Break 9:30-9:40 JST (3:30- EEST | 2:30- CEST | 19:30- CDT)
Special Lecture 5

9:40-10:10 JST (3:40- EEST | 2:40- CEST | 19:40- CDT)
Chair: Jun’ichiro KOMURA (Department of Radiobiology, IES)

Mechanisms of Radiation Action on Carcinogenesis: What Is Really Induced?
Nori NAKAMURA (RERF, Japan)
Break 10:10-10:20 JST (4:10- EEST | 3:10- CEST | 20:10- CDT)
Session 2A Biological Effects

10:20-11:20 JST (4:20- EEST | 3:20- CEST | 20:20- CDT)
Chair: Yutaka YAMADA (QST, Japan)

S2A-1 Intestinal Organoids for Studying Effects of Low-Dose/Low-Dose-Rate Radiation
Yuki FUJIMICHI (CRIEPI, Japan)
S2A-2 Dose-rate effect of rat mammary carcinogenesis
Tatsuhiko IMAOKA (QST, Japan)
S2A-3 Experimental Studies at the IES on the Biological Effects of Chronic Low Dose-Rate
Radiation Exposure in Mice
Ignacia Braga TANAKA III (Department of Radiobiology, IES, Japan)
Poster Exhibition / Viewing on website (No oral presentation)
Questions for Poster presenters will be accepted until 17:00 on September 28 (Tuesday).

Answers to Questions may be posted by the presenters until 12:00 on September 29(Wednesday).

Day 3: September 29 (Wed)
TRITIUM
Special Lecture 6

8:30-9:00 JST (2:30- EEST | 1:30- CEST | 18:30- (Tue, Sept 28) CDT)
Chair: Masakazu OTA (JAEA, Japan)

3

H and 14C Behaviour in Wild Biota – An improved Metabolic Model
Anca MELINTESCU (IFIN-HH, Romania)

Special Lecture 7

9:00-9:30 JST (3:00- EEST | 2:00- CEST | 19:00- CDT)
Chair: Tsutomu SHIMURA (National Institute of Public Health, Japan)

Genotoxicity, Tumorigenicity and Lifespan Effects of Chronically Ingested Tritium inMice In Vivo
Dmitry KLOKOV (IRSN, France)
Break 9:30-9:40 JST (3:30- EEST | 2:30- CEST | 19:30- CDT)

Announcement of Best Poster Awardees 9:30- JST [3:30- EEST | 2:30- CEST | 19:30- CDT])
Session 3A Environmental Dynamics of Tritium
9:40-10:20 JST (3:40- EEST | 2:40- CEST | 19:40- CDT)
Chair: Tomoyuki TAKAHASHI (Kyoto University, Japan)
S3A-1 Tritium Transfer into the Environment
Sumi YOKOYAMA (Fujita Health University, Japan)
S3A-2 Tritium Concentration in Monthly Precipitation near the Fusion Test Facility during
the Deuterium Plasma Experiment
Naofumi AKATA (Hirosaki University, Japan)
Break 10:20-10:30 JST (4:20- EEST | 3:20- CEST | 20:20- CDT)
Session 3B Biological Effects of Tritium
10:30-11:30 JST (4:30- EEST | 3:30- CEST | 20:30- CDT)
Chair: Tetsuya ONO (Former President of IES, Japan)

S3B-1 Analysis of Dose and Dose-Rate Dependence of Radiation-Type Mutation Induced by
Tritiated Water: An Approach Using a Hyper-Sensitive Cell System
Hiroshi TAUCHI (Ibaraki University, Japan)
S3B-2 A Study of the Biological Effects of Tritium in MiceToshiyuki UMATA(University of Occupational and Environmental Health, Japan)
S3B-3 Cellular Response by Long-Term Tritium Exposure in Normal Human Epithelial Cell
Masatoshi SUZUKI (Tohoku University, Japan)
Break 11:30-11:40 JST (5:30- EEST | 4:30- CEST | 21:30- CDT)
Poster Exhibition / Viewing on website (No oral presentation)
Questions for Poster presenters will be accepted until 17:00 on September 28 (Tuesday).
Answers to Questions may be posted by the presenters until 12:00 on September 29(Wednesday).

Panel Discussion on “Communication” (in Japanese only)
11:40-12:50 JST (5:40- EEST | 4:40- CEST | 21:40- CDT)
Moderator: Wako TOHJIMA (Science journalist, Japan)
Panelists:
Noboru TAKAMURA (Nagasaki University, Japan)
Michiaki KAI (Nippon Bunri University, Japan)
Noriko USAMI (KEK-IMSS-PF, Japan)
Sumi YOKOYAMA (Fujita Health University, Japan)
Hiroshi TAUCHI (Ibaraki University, Japan)
Yoshiya SHIMADA (President of IES, Japan)
Awarding Ceremony for Best Posters

12:50-13:00 JST (6:50- EEST | 5:50- CEST | 22:50- CDT)

Closing Remarks (in Japanese) 13:00-13:10 JST (7:00- EEST | 6:00- CEST | 23:00- CDT)
Sotaro ITO (Senior Executive Director, IES)