Kyoto University
Research Reactor InstituteInternational Symposium on
Environmental monitoring and dose
estimation of residents after accident of
TEPCO's Fukushima Daiichi Nuclear
Power Stations
14 December 2012
The Shiran Hall, Kyoto University
KURRI Research Program for Scientific
Basis of Nuclear Safety

Programme

Preface
In March 2011, a massive earthquake and the resulting tsunami struck the Tohoku
area in Japan, causing serious damages to TEPCO’s Fukushima Daiichi nuclear plant
and the release of a significant quantity of radionuclides into the surrounding
environment. This accident underlined the necessity of establishing new andcomprehensive scientific research for promoting safety in nuclear technology. With thisaim, the Kyoto University Research Reactor Institute (KURRI) developed a newresearch program called the “KUR Research Program for Scientific Basis of Nuclear
Safety” from this year. In this program, we are planning to hold an annual series ofinternational symposiums along with many other research activities.
The first in this series of symposiums, entitled “The International Symposium on
Environmental Monitoring and Dose Estimation of Residents after Accident of TEPCO's
Fukushima Daiichi Nuclear Power Station,” deals with the radiological effect of the
March 2011 accident in Fukushima Daiichi NPP on the public. The purpose of this
symposium is to collate data on environmental radioactivity and radiation dose inresidents, discuss and verify these data, and clarify the actual situation of environmental
contamination and resultant radiation exposed to the residents. We believe that an
accurate estimation of the radiation dose is quite essential for planning for the healthy
life and mental contentment of the residents, and we hope that many researchers who are
studying the radiological effects of the accident will join us for these purposes. The
environmental monitoring data are important for the dose assessment for residents.
However, the monitoring data in the early stage are not sufficient for dose assessment,
particularly near the NPP site, because of the confusion and blackout caused by theearthquake. However, many researchers and organizations in Japan and other countries
have independently carried out radiation monitoring. We believe that the publication andreviewing of these data is not only essential but our duty toward future generations.
Approximately 10 invited lectures and 50 scientific papers will be presented in the
symposium. Almost all the presentations have been written as original scientific papers,
peer reviewed by specialists of the relevant research fields, and included in theproceedings booklet. On behalf of all the participants of the symposium, I sincerely
hope that this symposium and its proceedings will contribute to the faster recovery ofpeople who have encountered damages from the accident and will promote further
progress in the research on nuclear safety.

Hirotake Moriyama
Director, Kyoto University Research Reactor Institute
Chair of the organizing committeeHost Organization
Kyoto University Research Reactor Institute (KURRI)

Support organization
・Japan Radiation Research Society
・ Atomic Energy Society of Japan・Japan Health Physics Society
・ Japan Society of Nuclear and Radiochemical

Organizing Committee
Chair: Hirotake Moriyama (Director, KURRI)
Dr. Jiro Inaba (REA)
Dr. Kimiaki Saito (JAEA)
Dr. Kazuo Sakai (NIRS)
Prof. Hirofumi Tsukada (Fukushima Univ.)
Dr. Shigeo Uchida (NIRS)
Prof. Itsumasa Urabe (Fukuyama Univ.)
Prof. Hiromi Yamazawa (Nagoya Univ.)
Prof. Akio Koyama (KURRI)
Prof. Ken Nakajima (KURRI)
Prof. Sentaro Takahashi (KURRI)
Prof. Hajimu Yamana (KURRI)

International Advisor
Prof. Hajimu Yamana (KURRI)
Prof. Yoshiharu Yonekura（NIRS)
Prof. Williams Lee, (Department of Materials, Imperial College London)

Program Committee
Chair: Prof. Sentaro Takahashi (KURRI)
Prof. Nobuhiko Ban (Tokyo Healthcare Univ.)
Dr. Takatoshi Hattori (CRIEPI)Prof. Noriyuki Momoshima (Kyushu Univ.)
Prof. Hirokuni Yamanishi (Kinki Univ.)
Dr. Nobuyuki Sugiura (NIRS)
Dr. Satoshi Yoshida (NIRS)
Prof. Koichi Takamiya (KURRI)
Prof. Minoru Tanigaki (KURRI)
Prof. Toshihiro Yamamoto (KURRI)

Conference Secretariat
Chair: Prof. Tomoyuki Takahashi (KURRI)
Prof. Satoshi Fukutani (KURRI)
Prof. Yuko Kinashi (KURRI)
Prof. Nobuhiro Sato (KURRI)
Ms. Maki Nakatani (KURRI)
1

Program
9:00-10:00

Registration、Poster Reception

10:00-10:05

Opening remarks Prof. Hirotake Moriyama, Director of KURRI

10:05-11:05

Accident of Fukushima Daiichi Nuclear Power Plant-Sequences, FP released, Lessons learned–
Speaker: Prof. Jun Sugimoto (Kyoto University)
Chair: Prof. Ken Nakajima (KURRI)

11:05-11:50

IAEA safety standards for radiological protection of the public in post-accident situations
Speaker: Dr.Gerhard Proehl (IAEA)
Chair: Hirofumi Tsukada (Fukushima University)

11:50-13:20

Lunch and poster session

13:20-14:20

UNSCEARs assessment of radiation levels/effects from Fukushima accident
Speaker: Prof. Wolfgang Weiss（Chair for the fifty-eighth and fifty-ninth sessions of UNSCEAR）

Chair: Prof. Hirotake Moriyama (Director of KURRI)
14:20-15:05

Radiation monitoring and mapping around the Fukushima site
Speaker: Dr. Kimiaki Saito (JAEA)
Chair: Prof. Hiromi Yamazawa (Nagoya University)

15:05-15:35

Coffee break and poster session

15:35-15:50

Implication of the isotopic ratios of radionuclides observed in the contaminatedareas surrounding Fukushima-Daiichi NPP
Speaker: Prof. Hajimu Yamana (KURRI)
Chair: Prof. Itsumasa Urabe (Fukuyama University)

15:50-16:10

Development of a car-borne survey system, KURAMA
Speaker: Prof. Minoru Tanigaki (KURRI)
Chair: Prof. Itsumasa Urabe (Fukuyama University)

16:10-16:40

NIRS’s activities for the reconstruction of early internal exposure in the TEPCO
Fukushima Daiichi Nuclear Power Station accident
Speaker: Dr. Osamu Kurihara (NIRS)
Chair: Prof. Nobuhiko Ban (Tokyo Healthcare University)

16:40-17:10

Release of plutonium isotopes from the Fukushima Daiichi Nuclear Power Plant accident
Speaker: Dr.Jian Zheng (NIRS)
Chair: Prof. Nobuhiko Ban (Tokyo Healthcare University)

17:20-17:50

Discussion

17:50-17:55

Closing remarks

18:00-19:30

Reception

Chair: Dr.Kazuo Sakai (NIRS)
Co-chair: Prof. Sentaro Takahashi (KURRI)
Prof. Hajimu Yamana (KURRI)

2

Poster sessions
Topics 1 Radiation survey in environment
1 Kazuhiro Akimoto
Wind-Driven Transport of Resuspended Radioactive Dust in Fukushima Prefecture
2 Takao Ebisawa, Seiichi Hirose, Etsuko Furuta, Keiji Kusama, Takeshi Iimoto
Environmental radiation status in Bunkyo-ku, Tokyo, after the TEPCO Fukushima Dai-ichi NPP
Nuclear Disaster3 Seiichi Someya, Hirofumi Fujii, Takeshi Iimoto
Environmental radiation status in Kashiwa City (Chiba Prefecture) after the TEPCO Fukushima
Dai-ichi NPP Nuclear Disaster4 Sadao Iiizumi, Hirofumi Fujii, Takeshi Iimoto
Environmental radiation status in Nagareyama City (Chiba Prefecture) after the TEPCO
Fukushima Dai-ichi NPP Nuclear Disaster5 Takeshi Iimoto, Norio Nogawa, Hiroshi Mitani, Masao Kamiko, Takahiko Suzuki
Environmental radiation status in The University of Tokyo after the TEPCO Fukushima Dai-ichi
NPP Nuclear Disaster6 Takumi Kubota, Tomoko Ohta
Radiation measurement in the East Japan with a GM-tube detector after the Fukushima nuclear accident
7 Takumi Kubota, Jun-ichi Hori, Nobuhiro Sato, Koichi Takamiya
Measurement of radiation dose by car in Fukushima from 19 to 22 March 2011
8 Nobuhito Ohte, Masashi Murakami, Kohei Iseda, Keitaro Tanoi, Nobuyoshi Ishii
Diffusion and transportation dynamics of 137Cs deposited on the forested area in Fukushima after
the nuclear power plant accident in March 2011
9 Shinji Sugihara, Noriyuki Momoshima, Akihiro Maekawa, Ryohei Ichikawa, Hidehisa Kawamura
Distribution of gamma-ray dose rate in Fukushima Prefecture by a car borne survey method
10 Kazuaki Yajima, Kazuki Iwaoka, So Kamada, Masashi Takada, Hiroyuki Tabe, Hidenori Yonehara,
Sin-ya Hohara, Genichiro Wakabayashi, Hirokuni Yamanishi, Tetsuo Itoh, Michio Furukawa
Dose rate survey inside and outside three types of public buildings located approximately 40 km
northwest from the Fukushima Daiichi Nuclear Power Stations
11 Kazuaki Yajima, Kazuki Iwaoka, Hiroshi Yasuda
Radiation survey along two trails in Mt. Fuji to investigate the influence of the radioactive
contamination due to the Fukushima nuclear accident
12 Tomoaki Yamamoto, Kenzo Muroi, Sumito Maruyama, Takahisa Koike, Marina Matsuda,
Kenichiro Katsumata
Environmental radiation doses due to the accident at the Fukushima Daiichi Nuclear Power Plants313 Tetsuo Itoh , Michio Furukawa, Nobuyuki Sugiura, Hirokuni Yamanishi, Genichiro Wakabayashi
Tetsuo Horiguchi, Shin-ya Hohara, Masayo Inagaki, Hiroshi Noma, Kiyoshi Kojima
Survey of environmental radiation in Kawamata-machi, Fukushima-ken
14 Masahiro Yoshida
Environmental radiation measurements immediately after the accident and dose evaluations bysoil deposition
Topic 2 Environmental Radioactivity
1 Tatsuo Aono, Satoshi Igarashi, Yukari Ito, Jyota Kanda, Takashi Ishimaru
Radioactivity Survey in Marine Environment in the Pacific off Fukushima after Accident of
TEPCO's Fukushima Daiichi Nuclear Power Station
2 Satoru Endo, Tsuyoshi Kajimoto, Kiyoshi Shizuma
Dose rate estimation for northern Miyagi Prefecture area at the early stage of Fukushima accident
3 Naoto Fujinami, Naoto Miyajima, Tetsuya Watanabe, Yoshihiro Tanabe, Hajime Nishiuchi
Influence of the Fukushima Daiichi Nuclear Power Plant Accident observed from results ofenvironmental radiation monitoring in Kyoto
4 Ryuta Hazama, Akihito MatsushimaComparison between fallout with rain from Fukushima, Chernobyl reactor accidents in Japan,and Hiroshima atomic bomb
5 Sin-ya Hohara, Masayo Inagaki, Hirokuni Yamanishi, Genichiro Wakabayashi, Wataru Sugiyama,
Tetsuo Itoh
Survey of radioactive contamination distribution at Naka-Dori area, Tohoku Region, Japan
6 Nobuyoshi Ishii, Hiroyuki Koiso, Keiko Tagami, Shigeo Uchida
Elution of radiocesium from soil
7 Hidesuke Itadzu, Tetsuo Iguchi, Toshikazu Suzuki
Development of rapid self-absorption correction method used for HPGe detector
8 Tsuyoshi Kajimoto, Satoru Endo, Takeshi Naganuma, Kiyoshi Shizuma
Distribution of radioactive 137Cs and 134Cs in river water and bottom sand for major rivers at
Minami-Souma City in Fukushima
9 Akihiro Maekawa, Noriyuki Momoshima, Shinji Sugihara, Toshiya Tamari
Determination of radiostrontium released from Fukushima Daiichi Nuclear Power Plant by
extraction chromatography and liquid scintillation counting
10 N. Momoshima, S. Sugihara, R. Ichikawa, A. Maekawa, R. Ozawa, A. Nakama
Radioactivity in vegetation at Fukushima area contaminated with radionuclides released fromTEPCO's Fukushima Daiichi Nuclear Power Stations
11 Kimihito Nakamura, Tetsuo Yasutaka
Characteristics of radiocesium concentration in stream water from a catchment in hilly andmountainous area at rainfall event

412 Tatsuya Shimazaki, Yoshioki Shiraishi, Kumiko Goto, Akihiro Kojima, Toru Urano, Seiji Okada
Specific activity and time dependence of radionuclides in soils affected by the accident of the
Fukushima Dai-ichi nuclear power plant.
13 Kiyoshi Shizuma, Tsuyoshi Kajimoto, Satoru Endo
Early air sampling in Higashi-Hiroshima after the accident of the Fukushima daiichi nuclear power
plant and subsequent sampling in Minami-Souma City during October 2011 to September 2012.
14 Keiko Tagami, Shigeo Uchida, Nobuyoshi Ishii, Jian Zheng
Estimation of Tellurium-132 distribution in Fukushima prefecture
15 Yoshito Watanabe, San’ei Ichikawa, Masahide Kubota, Masahiko Mizoguchi, Toshiyuki
Takano,Yoshihisa Kubota, Shoichi Fuma, Satoshi Yoshida
Effects of radionuclide contamination on forest trees in 20 km exclusion zone around the
Fukushima Daiichi Nuclear Power Plant
16 Masanobu Ishida, Ryota Nakagawa, Kohei Umetsu, Miyabi Sugimoto, Yuta Yamaguchi, Hideo
YamazakiGeographical distribution of radioactive nuclides released from the Fukushima Daiichi Nuclear
Power Station accident in the metropolitan area, Japan
17 Ryota Nakagawa, Masanobu Ishida, Daisuke Baba, Satomi Tanimoto, Yuichi Okamoto,
Hideo Yamazaki
Spatial and temporal distribution of 134Cs and 137Cs derived from Fukushima Daiichi Nuclear
Power Station in the sediment of Tokyo Bay, Japan
18 Tetsuo Yasutaka, Yoshishige Kawabe, Kimihito Nakamura, Akihiro Kurosawa, Takeshi Komai
Monitoring dissolved radioactive cesium in the Abukuma river water in Fukushima Prefecture
19 Wenting Bu, Jian Zheng, Tatsuo Aono, Keiko Tagami, Shigeo Uchida, Jing Zhang, Makio Honda,
Masatoshi Yamada
Investigating plutonium contamination in marine sediments off Fukushima following the
Fukushima Daiichi Nuclear Power Plant accident
Topics 3 Transfer model and/or parameters
1 Shigeto Fujimura, Takeshi Ohno, Yasuyuki Muramatsu, Hirofumi Tsukada, Kunio Yoshioka, Hiroshi
Saito, Mutsuto Sato, Makoto Sato, Yuuki Sakuma
The use of rice seedlings to estimate the transfer of radiocaesium from soil to plants in Fukushima
Prefecture
2 Jun Hirouchi, Tian Zhang, Yasuhiro Takamura, Shigekazu Hirao, Jun Moriizumi,
Hiromi Yamazawa
Deduction of useful information from dose rate monitoring data in an emergency
3 Nao Ishikawa, Ayumi Ito, Teruyuki Umita
Possibility of removing radionuclides in landfill leachate using advanced wastewater treatment processes

54 Kayoko Iwata, Keiko Tagami, Shigeo Uchida
Estimation of ecological half-lives of radiocesium in marine biota at the offshore of Fukushima, Japan
5 Masanori Kimura, Kazumasa Shimada, Shogo Takahara, Fumihisa Nagase, Toshimitsu Homma
Estimation of accident source terms for the Fukushima Daiichi Nuclear Power Plant using
RAMS/HYPACT
6 Hi-Rocky Ohtani , Xiaoguang Lu, Akira Tsuchiya, Shinichiro Yoshida, Takahiro Hirayama
Sedimentation diffusion of radioactive cesium in a paddy field.
7 Takashi Saito, Satoru Ohkoshi, Shigeto Fujimura, Koji Iwabuchi, Masaaki Saito, Tomoaki Nemoto,
Mutsuto Sato, Makoto Sato, Kunio Yoshioka, Hirofumi Tsukada
Distribution of radiocesium on cultivated field and suppressive effect of radiocesium uptake inbrown rice by potassium
8 Yasukazu Suzuki, Takasi Saito, Hirofumi Tsukada
Phytoremediation of radiocesium in different soil using cultivated plant
9 Guosheng Yang, Jian Zheng, Keiko Tagami, Shigeo UchidaDirect determination of tellurium in soil and plant samples by sector-field inductively coupledplasma mass spectrometry for the study of soil-plant transfer of radioactive tellurium following
the Fukushima Daiichi Nuclear Power Plant accident
Topics 4 Source term estimation
1 Shigekazu Hirao, Hironori Hibino, Takuya Nagae, Jun Moriizumi, Hiromi Yamazawa,
Source term estimation using environmental monitoring data
Topics 5 Dose estimation
1 Hikaru Amano, Yuji Ohta, Shigeru Banba, Takeshi Maeyama, Yoshihiro Ikeuchi, Takao Morimoto
Radiation doses from external and internal by inhalation of atmosphere and ingestion of drinking
water contaminated by the Fukushima Daiichi Nuclear Power Plants Accident for the people
living in the Chiba district.
2 Sakae Kinase, Masanori Kimura, Shinji Hato
Internal dosimetry for continuous chronic intake of caesium-137 in cedar pollen after the
Fukushima Daiichi Nuclear Power Plant accident
3

Kouta Kurihara, Yuko Kinashi, Kenichi Okamoto, Eiko Kakihana, Tomohiro Miyake,Tomoyuki Takahashi, Keiko Fujiwara, Hiroshi Yashima, Hidehito Nakamura, Sentaro Takahashi
Internal radiation dose of KURRI volunteers working at evacuation shelters after TEPCO`s
Fukushima Daiichi nuclear Power Plant accident

4 Shigeru Kumazawa
Distribution of doses to residents evacuated after Fukushima Nuclear Power Station accident

65 Yoshiyasu Nagakawa, Takashi Suzuki, Yasuhito Kinjo, Noboru Sakurai, Takahiro Sotodate,Hiroaki Ise
Measurement of radioactivity in air-borne dust and estimation of public dose in Tokyo after the
Fukushima Daiichi Nuclear Power Plant Accident
6 Shogo Takahara, Masashi Iijima, Kazumasa Shimada, Masanori Kimura,
Sakae KINASE, Toshimitsu HOMMA
Assessment of doses to the public in the contaminated areas resulting from the Fukushima
Daiichi Nuclear Power Station accident
7 Hiroko Yoshida, Noriyasu Hirasawa, Ikuo Kobayashi
Initial substantial reduction in air dose rate of Cs-origin and personal dose to residents due to the
Fukushima nuclear accident

7

Access and Map to Shiran Hall
Address：Yoshida-Konoe-cho, Sakyo-ku, Kyoto, Japan
From Kansai International Airport to Kyoto Station

75min by Airport Express HARUKA (train)
85min by limousine bus