Kyoto University
Research Reactor InstituteInternational Symposium on
Environmental monitoring and doseestimation of residents after accident ofTEPCO's Fukushima Daiichi Nuclear
Power StationsKUR Research Program for Scientific
Basis of Nuclear Safety

Proceedings

International Symposium on Environmental monitoring and dose estimation of residents
after accident of TEPCO's Fukushima Daiichi Nuclear Power Stations
Proceedings of the International Symposium on Environmental monitoring and dose estimationof residents after accident of TEPCO's Fukushima Daiichi Nuclear Power Stations
Shiran Hall, Kyoto, Japan, December 14, 2012

Edited bySentaro Takahashi
Hajimu Yamana
Tomoyuki Takahashi
Koichi Takamiya
Satoshi Fukutani
Nobuhiro Sato
Maki Nakatani

KUR Research Program for Scientific Basis of Nuclear Safety

ISBN-978-4-9906815-0-0 (Book)
ISBN-978-4-9906815-1-7 (CD-R)
ISBN-978-4-9906815-2-4 (from Web)
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Proceedings of the International Symposium on
Environmental monitoring and dose estimation of residents
after accident of TEPCO's Fukushima Daiichi Nuclear Power Stations
Shiran Hall, Kyoto, Japan, December 14, 2012

Host Organization

Kyoto University Research Reactor InstituteSupport organization

Japan Radiation Research Society
Atomic Energy Society of Japan
Japan Health Physics Society
Japan Society of Nuclear anadiochemical

Organizing Committee
Chairperson

International Advisor
Chairperson

Program Committee
Chairperson

Conference Secretariat
Chairperson

Hirotake Moriyama
Jiro Inaba
Kimiaki Saito
Kazuo Sakai
Hirofumi TsukadaShigeo Uchida
Itsumasa Urabe
Hiromi Yamazawa
Akio Koyama
Ken Nakajima
Sentaro Takahashi
Hajimu Yamana

Hajimu Yamana
Yoshiharu Yonekura
Williams Lee

Sentaro Takahashi
Nobuhiko Ban
Takatoshi Hattori
Noriyuki Momoshima
Hirokuni Yamanishi
Nobuyuki Sugiura
Satoshi Yoshida
Koichi Takamiya
Minoru Tanigaki
Toshihiro Yamamoto

Tomoyuki Takahashi
Satoshi Fukutani
Yuko Kinashi
Nobuhiro Sato
Maki Nakatani

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 necessit y 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 s ymposiums 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 theMarch 2011 accident in Fukushima Daiichi NPP on the public. The purpose of thissymposium is to collate data on environmental radioactivity anadiation dose inresidents, discuss and verify these data, and clarify the actual situation of environmental
contamination anesultant radiation exposed to the residents. We believe that anaccurate 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 thesymposium. 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

Contents
Part 1 Radiation survey in environment
1 Environmental radiation status in Bunkyo-ku, Tokyo, after the TEPCO Fukushima Dai-ichi nuclear power plant disaster
Takao EBISAWA, Seiichi HIROSE, Etsuko FURUTA, Keiji KUSAMA, Takeshi IIMOTO
2Environmental radiation status in Kashiwa city (Chiba prefecture) after the TEPCO Fukushima Dai-ichi nuclear powerplant disasterSeiichi SOMEYA, Hirofumi FUJII, Takeshi IIMOTO

3 Environmental radiation status in Nagareyama city (Chiba prefecture) after the TEPCO Fukushima Dai-ichi nuclear
power plant disaster
Sadao IIIZUMII, Hirofumi FUJII, Takeshi IIMOTO
4 Environmental radiation status of the University of Tokyo after the TEPCO Fukushima Dai-ichi nuclear power plant
disasterTakeshi IIMOTO, Norio NOGAWA, Hiroshi MITANI, Masao KAMIKO, Natsumaro KUTSUNA,
Yasuhiro WATANABE, Takahiko SUZUKI
5 Radiation measurement in East Japan using a GM-tube detector after the Fukushima nuclear accident
Takumi KUBOTA, Tomoko OHTA, Yasunori MAHARA
6 Measurement of radiation dose inside a car across Fukushima from March 19 to 22, 2011
Takumi KUBOTA, Jun-ichi HORI, Nobuhiro SATO, Koichi TAKAMIYA
7 Diffusion and export dynamics of 137Cs deposited on the forested area in Fukushima after the nuclear power plant accident
in March 2011: Preliminary results
Nobuhito OHTE, Masashi MURAKAMI, Takahiro SUZUKI, Kohei ISEDA, Keitaro TANOI, Nobuyoshi ISHII
8 Distribution of gamma-ray dose rate in Fukushima prefecture a car-borne survey method
Shinji SUGIHARA, Noriyuki MOMOSHIMA, Akihiro MAEKAWA, Ryohei ICHIKAWA,Hidehisa KAWAMURA
9 Dose rate survey inside and outside three public buildings located approximately 40km northwest of the Fukushima
Daiichi Nuclear Power Stations
Kazuaki YAJIMA, Kazuki IWAOKA, So KAMADA, Masashi TAKADA, Hiroyuki TABE, Hidenori YONEHARA,
Sin-ya HOHARA, Genichiro WAKABAYASHI, Hirokuni YAMANISHI, Tetsuo ITOH, Michio FURUKAWA
10 Measurement of the environmental radiation dose due to the accident at the Fukushima Daiichi Nuclear Power Plant
Tomoaki YAMAMOTO, Kenzo MUROI, Sumito MARUYAMA, Takahisa KOIKE, Marina MATSUDA
Kenichiro KATSUMATA
11 Environmental radiation survey in Kawamata-machi, Fukushima-ken : Measurement of radiocesium in soil and plants
Hirokuni YAMANISHI, Masayo INAGAKI, Genichiro WAKABAYASHI, Shin-ya HOHARA, Tetsuo ITOH,Michio FURUKAWA
12 Environmental radiation measurements immediately after the accident and dose evaluations based on soil deposition
Masahiro YOSHIDA, Tominori SUZUKIPart 2 Environmental radioactivity
1 Observation of radionuclides in marine biota off the coast of Fukushima prefecture after TEPCO's Fukushima Daiichi
Nuclear Power Plant accident
Tatsuo AONO, Yukari ITO, Tadahiro SAOTOME, Takuji MIZUNO, Satoshi IGARASHI, Jyota Kanda,Takashi ISHIMARU
2 Dose rate estimation for northern Miyagi prefecture area in the early stage of the Fukushima Accident
Satoru ENDO, Tsuyoshi KAJIMOTO, Kiyoshi SHIZUMA
3 Influence of the Fukushima Daiichi Nuclear Power Plant accident as determined by results of environmental radiation
monitoring in Kyoto
Naoto FUJINAMI, Naoto MIYAJIMA, Tetsuya WATANABE, Yoshihiro TANABE, Hajime NISHIUCHI
4 Comparison of fallout in rain due to the Fukushima and Chernol reactor accidents and the Hiroshima atomic bomb
Ryuta HAZAMA, Akihito MATSUSHIMA
5 Survey of radioactive contamination distribution in the Naka-Dori area, Tohoku, Japan
Sin-ya HOHARA, Masayo INAGAKI, Hirokuni YAMANISHI, GenichiroWAKABAYASHI, Wataru SUGIYAMA,Tetsuo ITOH
6 Elution of radiocesium from soil and sludge
Nobuyoshi ISHII, Hiroyuki KOISO, Keiko TAGAMI, Shigeo UCHIDA
7 Development of a self-absorption correction method used for HPGe detector by means of a Monte Carlo simulation
Hidesuke ITADZU, Tetsuo IGUCHI, Toshikazu SUZUKI
8 Distribution of radioactive 137Cs and 134Cs in river water and bottom sand for major rivers at Minami-Soma City inFukushima
Tsuyoshi KAJIMOTO, Satoru ENDO, Takeshi NAGANUMA, Kiyoshi SHIZUMA
9 Determination of radiostrontium released from Fukushima Daiichi Nuclear Power Plant through extraction chromatography
and liquid scintillation counting
Akihiro MAEKAWA, Noriyuki MOMOSHIMA, Shinji SUGIHARA, Toshiya TAMARI
10 Radioactivity in vegetation at the Fukushima area: a study on contamination by radionuclides released from TEPCO's
Fukushima Daiichi nuclear power plants
Noriyuki MOMOSHIMA, Ryosuke OZAWA, Sinji SUGIHARA, Ryohei ICHIKAWA, Akihiro MAEKAWA,Akimitsu NAKAMA
11 Concentration of radiocesium in stream water from a mountainous catchment area during rainfall events
Kimihito NAKAMURA, Tetsuo YASUTAKA, Masato HATAKEYAMA
12 Early air sampling in Higashi-Hiroshima after the Fukushima Daiichi Nuclear Power Plant accident and subsequent
sampling in Minami-Souma City from October 2011 to September 2012
Kiyoshi SHIZUMA, Tsuyoshi KAJIMOTO, Satoru ENDO
13 Estimation of Tellurium-132 Distribution in Fukushima Prefecture
Keiko TAGAMI, Shigeo UCHIDA, Nobuyoshi ISHII, Jian ZHENG

14 Effects of radionuclide contamination on forest trees in the exclusion zone around the Fukushima Daiichi Nuclear PowerPlant
Yoshito WATANABE, San’ei ICHIKAWA, Masahide KUBOTA, Toshiyuki TAKANO, Masahiko MIZOGUCHI ,Yoshihisa KUBOTA, Shoichi FUMA, Satoshi YOSHIDA
15 Geographical distribution of radioactive nuclides released from the Fukushima Daiichi Nuclear Power Station accident ineastern Japan
Masanobu ISHIDA, Ryota NAKAGAWA, Kohei UMETSU, Miyabi SUGIMOTO, Yuta YAMAGUCHI,HideoYAMAZAKI
16 Spatiotemporal distribution of radioactive cesium released from Fukushima Daiichi Nuclear Power Station in thesediment of Tokyo Bay, Japan
Ryota NAKAGAWA, Masanobu ISHIDA, Daisuke BABA, Satomi TANIMOTO, Yuichi OKAMOTO,
Hideo YAMAZAKI
17 Monitoring dissolved radioactive cesium in Abukuma River in Fukushima Prefecture
Tetsuo YASUTAKA, Yoshishige KAWABE, Akihiko KUROSAWA, Takeshi KOMAI
18 Investigating plutonium contamination in marine sediments off Fukushima coast following the Fukushima Dai-ichiNuclear Power Plant accident
Wenting BU, Jian ZHENG, Tatsuo AONO, Keiko TAGAMI, Shigeo UCHIDA, Jing ZHANG, Qiuju GUO,Masatoshi YAMADAPart 3 Transfer model and/or parameters
1 Use of rice seedlings to estimate uptake of radiocesium from soil to plants in Fukushima Prefecture
Shigeto FUJIMURA, Yasukazu SUZUKI, Takeshi OHNO, Yasuyuki MURAMATSU, Hirofumi TSUKADA,
Kunio YOSHIOKA, Takashi SAITO, Mutsuto SATO, Makoto SATO, Yuuki SAKUMA
2 Deduction of useful information from dose rate monitoring data under emergency conditions
Jun HIROUCHI, Tian ZHANG, Yasuhiro TAKAMURA, Shigekazu HIRAO, Jun MORIIZUMI,Hiromi YAMAZAWA
3 Possibility of removing radionuclides in landfill leachate using advanced wastewater treatment processes
Nao K.ISHIKAWA, Ayumi ITO, Teruyuki UMITA
4 Estimation of ecological half-lives of radiocesium in marine biota at the offshore of Fukushima, Japan
Kayoko IWATA, Keiko TAGAMI, Shigeo UCHIDA
5 Effect of potassium application on root uptake of radiocesium in rice
Takashi SAITO, Satoru OHKOSHI, Shigeto FUJIMURA, Koji IWABUCHI, Masaaki SAITO, Tomoaki NEMOTO,Mutsuto SATO, Makoto SATO, Kunio YOSHIOKA, Hirofumi TSUKADA
6 Phytoremediation of radiocesium in different soils using cultivated plants
Yasukazu SUZUKI, Takasi SAITO, Hirofumi TSUKADA
7 Direct determination of tellurium in soil and plant samplesby sector-field ICP-MS for the study of soil-plant transfer ofradioactive tellurium subsequent to the Fukushima Daiichi Nuclear Power Plant accident
Guosheng YANG, Jian ZHENG, Keiko TAGAMI, Shigeo UCHIDAPart 4 Source term estimation
1 Estimation of uncertainty in the release rate of I-131 and Cs-137 from FDNPS estimated from environmental data
Shigekazu HIRAO, Hironori HIBINO, Takuya NAGAE, Jun MORIIZUMI, Hiromi YAMAZAWA
2 Release of plutonium isotopes from the Fukushima Daiichi Nuclear Power Plant accident
Jian ZHENG, Keiko TAGAMI, Shigeo UCHIDAPart 5 Dose estimation
1 External and internal radiation doses from the Fukushima Daiichi Nuclear Power Plant accident received by residents ofChiba, JapanHikaru AMANO, Yuji OHTA, Shigeru BANBA, Takeshi MAEYAMA, Yoshihiro IKEUCHI, Takao MORIMOTO
2 Internal dosimetry for continuous chronic intake of caesium-137 in cedar pollen after the Fukushima Daiichi nuclear
power plant accident
Sakae KINASE, Masanori KIMURA, Shinji HATO
3 Internal radiation dose of KURRI volunteers working at evacuation shelters after TEPCO’s Fukushima Daiichi nuclear
power plant accident
Kouta KURIHARA, Yuko KINASHI, Kenichi OKAMOTO, Eiko KAKIHANA, Tomohiro MIYAKE,
Tomoyuki TAKAHASHI, Keiko FUJIWARA, Tatsuya YAMADA, Hiroshi YASHIMA, Hidehito NAKAMURA ,Sentaro TAKAHASHI
4 Distribution of doses to residents evacuated after the Fukushima Nuclear Power Station accident
Shigeru KUMAZAWA
5 Measurement of radioactivity in airborne dust and estimation of public dose in Tokyo after the Fukushima Daiichi
Nuclear Power Plant accident
Yoshiyasu NAGAKAWA, Takashi SUZUKI, Yasuhito KINJO, Noboru SAKURAI, Takahiro SOTODATE,
Hiroaki ISE
6 Assessment of radiation doses to the public in areas contaminated by the Fukushima Daiichi Nuclear Power Station
accident
Shogo TAKAHARA, Masashi IIJIMA, Kazumasa SHIMADA, Masanori KIMURA, Toshimitsu HOMMA
7 Initial substantial reduction in air dose rates of Cs origin and personal doses for residents owing to the Fukushima nuclear
accident
Hiroko YOSHIDA, Junko SAITO, Noriyasu HIRASAWA, Ikuo KOBAYASHI