Ministry of Educa�on, Culture, Sports, Science & Technology (MEXT) “Program for Leading Graduate Schools” accepted for 2011
平成２３年度文部科学省「博士課程教育リーディングプログラム」

HIROSHIMA UNIVERSITY 広島⼤学
Phoenix Leader Educa�on Program (Hiroshima Ini�a�ve)
for Renaissance from Radia�on Disaster
放射線災害復興を推進するフェニックスリーダー育成プログラム

The 6th Interna�onal Symposium
Reconstruc�ng Radia�on Disaster‐Aﬀected Communi�es:
The Mediator’s Role in the Recovery Process
原発事故の影響を受けたコミュニティの再構築：
復興過程における「仲介者」の役割

February 11 (Sat) ‐ 12 (Sun), 2017
Hiroshima University Kasumi Campus
Koujin Kaikan Conference Hall

General Information

Date
February 11 and 12, 2017

Venue
Hiroshima University Kasumi Campus ‘Koujin Kaikan Conference Hall’
1-2-3 Kasumi, Minami-ku, Hiroshima City, Hiroshima, Japan

LanguageSat., February 11 (Day 1) English
Sun., February 12 (Day 2) English and Japanese (simultaneous interpretation available)

Organized by
Organization of the Leading Graduate Education Program, Hiroshima University

Phoenix Leader Education Program® (Hiroshima Initiative)
for Renaissance from Radiation Disaster

Development of internationally minded personnel capable of managing the recoveryof people, society, and environment of areas affected by radiological disaster

This program establishes “Radiation Disaster Recovery Studies” as aninterdisciplinary and practical discipline, based on Hiroshima University’s
experience and achievements in supporting recovery from the atomic bombing. The
program will develop personnel with the skills to “protect human lives fromradiation disasters”, “protect the environment form radioactivity”, and “protect thehuman society from radioactivity”. Graduates from the program will become coreleaders in situations requiring recovery from radiation disasters. The 5-year or
4-year integrated curriculum is designed to develop global leaders (Phoenix
Leader®) who have the judgment and behavioral abilities to take appropriate
actions in circumstances of radiation disaster and lead recovery with a clear
philosophy and innovative knowledge across discipline.

Ministry of Education, Culture, Sports, Science and Technology – MEXT
“Program for Leading Graduate Schools (Cross Sectional Theme)” accepted for FY2011

Contents

Welcome Message from Program Director  ࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭ 1

Program ࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭ 2

Abstracts of Lectures ࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭ I-1

Panelists࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭ II-1

Abstracts of Student Oral Presentations ࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭ III-1

Abstracts of Student Flash & Poster Presentations ࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭ IV-1

Floor Plan of Koujin Kaikan Conference Hall࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭ ࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭V-1

Organizing Committee ࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭࣭VI-1

Welcome Address
Dear guests and colleagues,
I am honored and privileged to welcome you all to the 6th Phoenix Leader Education
ProgramInternational

Symposium,‘Reconstructing

Radiation

Disaster-Affected

Communities: The Mediator’s Role in the Recovery Process.’ For this symposium, we arehonored to welcome many distinguished experts from abroad including Dr. Jacques
Lochard of the ICRP, Dr. May Abdel-Wahab of the IAEA, and Dr. Wolfgang Weiss of the
BfS, as well as many other acclaimed participants who have been working at sites inFukushima. We look forward to learning about their activities and research efforts.
Nearly six years have passed since the accident at the Fukushima Daiichi Nuclear
Power Station. The people of Japan have made a concerted effort to the ongoingreconstruction of Fukushima along with the support of people from around the world.
Despite these extensive efforts, it can be said that the reconstruction has just begun.
Under the current circumstances, one of the challenges we are facing is how to effectively
connect the local community and the specialists with the accurate scientific knowledge.
Consequently we recognize the growing need for “mediators” who are able to delivera steady flow of accurate and accessible scientific knowledge to the local community. This
6th International Symposium will focus on the role of the mediator during the
Fukushima recovery process to bridge the gap that exists between scientists and the local
community.
Here at Hiroshima University we established the Phoenix Leader Education
Program in 2011 through a Ministry of Education initiative. Our aim is to educate future
leaders to effectively deal with the recovery from radiation disaster. We are proud to have
had our first two graduating students this past September who are now active on theinternational stage. One of them, Ms. Momo Kurihara, will be delivering a lecture during
this symposium. In addition, we welcomed nine new students this past semester. There
are now a total of twelve different countries represented in our program. I am looking
forward to all of their continued successes as future global leaders.
I hope this international symposium will serve as an opportunity for all attendees toconsider the role of mediator from many different perspectives, and to share new findings
and knowledge. Thank you again everyone for joining us.
Kenji Kamiya
Vice President (Reconstruction Support/Radiation Medicine)
Director of Phoenix Leader Education Program
Hiroshima University
1

Program
The 6th International Symposium
Phoenix Leader Education Program (Hiroshima Initiative) for
Renaissance from Radiation Disaster

Reconstructing Radiation Disaster-Affected Communities:
The Mediator’s Role in the Recovery Process
Saturday, February 11th (Main Conference Room: 2nd floor)
12:30-

Opening Remarks

12:35-

Graduate Student Oral Presentations

14:45-

Graduate Student Flash Presentations

16:20-Break(Lobby: 1st & 2nd floor)
16:30-18:20

Poster Presentations (Student Research Presentation) (Medium Conference Room: 1st Floor)
18:30-20:30

Reception Party

2

Sunday, February 12th (Main Conference Room: 2nd floor)
10:00

Opening Remarks
Dr. Kenji Kamiya (Vice President of Hiroshima University, Director of
Phoenix Leader Education Program)
Message from MEXT
Ms. Mutsuko Inoue (Director, Office for University Reform, Higher
Education Bureau, Ministry of Education, Culture, Sports, Scienceand Technology (MEXT))

Keynote Lecture (Chair: Dr. Kenji Kamiya)
10:15-10:45

Social Trust, Confidence, and Cooperation in Post-Nuclear
Accident Situations
Dr. Jacques Lochard (Vice-Chair of ICRP, Visiting Professor of
Hiroshima University)

Session: Environment (Chairs: Dr. Thomas Johnson & Dr. Toshinori Okuda)
10:45-11:00

Challenges toward Reconstruction of Agriculture in Fukushima
Dr. Yuzo Mampuku (National Agriculture and Food Research
Organization)

11:00-11:15

Temporal Variation of Radiocesium Concentration in Fresh Water
Inside the Evacuation Zone and Supporting Activity for Evacueesof this Region
Dr. Tetsuo Yasutaka (National Institute of Advanced Industrial
Science and Technology)

11:15-11:30

Oil 137Cs Dynamics in Mixed Deciduous Forests in Fukushima(doctoral study)
Dr. Momo Kurihara (Phoenix Leader Education Program Alumna /Post-Doctoral Researcher of AIST)

11:30-11:45

Q&A Session

11:45-11:55

Break

3

Session: Medical Support (Chairs: Dr. Albert Wiley & Dr. Shinya Matsuura)
11:55-12:10

Importance of Stakeholder Involvement during the Reconstruction
Period after Nuclear Disaster - What Kind of Radiological
Information Should Be Shared?
Dr. Makoto Miyazaki (Fukushima Medical University)

12:10-12:25

Addressing Anxiety Regarding Thyroid Cancer Screening after a
Radiation DisasterDr. Sanae Midorikawa (Fukushima Medical University)

12:25-12:35

Q&A Session

12:35-13:40

Lunch Break (12:35-12:45 Group Photograph)

Session: Community (Chairs: Dr. Thierry Schneider & Dr. Tsunekazu Toda)
13:40-13:55

Current Situation after the Passage of More Than Five Years since
the Great East Japan Earthquake
Ms. Atsuko Suzuki (Social Welfare Council of Minami Soma City)

13:55-14:10

Developing a Common Language after the Nuclear Accident: The
Experience of Suetsugi Area in Iwaki City
Ms. Ryoko Ando (Representative of Ethos in Fukushima)

14:10-14:20  Current Situation and Issues on the Restarted Cultivation of

Eustoma in the Evacuation Zone
Mr. Akihiko Hirono (Flower Farmer in Fukushima)
14:20-14:35

The Berkeley Institute for Resilient Communities: Combining
Science, Education, and Communities
Dr. Kai Vetter (Director of Institute for Resilient Communities,
Lawrence Berkeley National Laboratory)

14:35-14:55

Q&A Session

4Session: Concluding Lectures (Chairs: Dr. May Abdel-Wahab & Dr. Masao Kobayashi)
14:55-15:15

Key Elements of Public Health Protection in a Nuclear orRadiological Emergency
Dr. Wolfgang Weiss (Former Head of Department Radiation Protectionand Health of BfS)
Q&A Session

15:15-15:35

The Gap between Radiation Science and Perception People
Dr. Ohtsura Niwa (Chairman of Radiation Effects Research
Foundation)
Q&A Session

15:35-15:50

Break

Panel Discussion (Chairs: Dr. Jacques Lochard (ICRP) & Dr. Ohtsura Niwa (RERF))
15:50-16:35

Panelist (Group 1):
Dr. May Abdel-Wahab (IAEA)
Dr. Thomas Johnson (Colorado State University)

Dr. Sanae Midorikawa
Dr. Makoto Miyazaki
Ms. Atsuko Suzuki
Dr. Wolfgang Weiss
Dr. Albert Wiley (REAC/TS)

16:35-17:20

Panelist (Group 2):

Ms. Ryoko Ando
Mr. Akihiko Hirono
Dr. Momo Kurihara
Dr. Yuzo Mampuku
Dr. Thierry Schneider (CEPN)

Dr. Kai Vetter
Dr. Tetsuo Yasutaka
17:20-17:30

Poster Award Ceremony
Closing Remarks
Dr. Masao Kobayashi (Professor of Institute of Biomedical & Health
Sciences, Integrated Health Sciences, Hiroshima University)5Abstracts
LecturesFebruary 12, 201710:15 –15:35

Keynote Lecture
Social Trust, Confidence, and Cooperation in
Post-Nuclear Accident Situations
Jacques Lochard
Professor Nagasaki University
Visiting Professor Hiroshima University
ICRP Vice Chair

The experience of Chernobyl and Fukushima demonstrates that that it is possible toinvolve local stakeholders in the rehabilitation of living conditions in areas affected by anuclear accident in spite of the deep mistrust of the population vis-à-vis authorities andexperts and its inexperience in the situation, in particular as regards the radioactivity.
However, this involvement is only possible insofar as trust can be restored within theaffected communities, conducive to the establishment of a fair and effective cooperation
with the experts involved in the rehabilitation process. In the absence of trust, whateverefforts are made to inform, advise and involve those affected, it is not possible toestablish the foundations of confidence necessary to ensure productive stakeholder
involvement and mutually beneficial cooperation.
The presentation emphasizes the distinction between trust and confidence introduced
by social scientists to better understand the role and limitations of risk communicationin managing complex or conflicting situations involving risk. It also underlines therespective importance of sharing, in the co-expertise process between the affected
communities and the involved experts, key ethical values and objective data describing
the individual situations of the affected persons, as the basis for restoring trust andbuilding confidence leading to cooperation.

I㸫1

[Biography]
Jacques LOCHARD is currently Professor at Nagasaki University Atomic Bomb
Disease Institute, Visiting Professor at Hiroshima University Graduate School of
Biomedical and Health Sciences, and Vice-Chair of the International Commission on
Radiological Protection (ICRP).
Jacques LOCHARD was educated in Economics at the University of Besançon-France
and Pantheon-Sorbonne in Paris. He joined the Nuclear Protection Evaluation Centre(CEPN), a non-profit organization for research and studies in the evaluation of thetechnical, health, economic and societal dimensions of radiological protection in 1977.
He was the director of the Centre from 1989 to 2016.
Jacques LOCHARD's main contribution has been in the development of methodologies
for the implementation of the optimisation principles. He has published several tens ofarticles in scientific journals and in proceedings of international conferences coveringboth the theoretical and practical aspects of optimisation of radiological protection. He
also contributed in the field of radiation risk assessment and management to studies on
the health and environmental impacts of the nuclear fuel cycle.
Since the early nineties he has been actively involved in the rehabilitation of the living
conditions of the affected population after a nuclear accident, first in Belarus in thecontext of the management of the long-term consequences of the Chernobyl accident,
then in Japan in relation to the Fukushima accident.
Jacques LOCHARD has been President of the French Society of Radiation Protection(SFRP). He was also Executive Officer of the International Radiation Protection
Association (IRPA) and Chairman of the Committee on Radiation Protection and Public
Health (CRPPH) of the OECD Nuclear Energy Agency.

I㸫2

Session: Environment
Challenges toward Reconstruction of Agriculture
in Fukushima
Yuzo Mampuku
National Agriculture and Food Research Organization

Because of the 2011 Pacific coast of Tohoku Earthquake and the accidents/incidents at
the Tokyo Electric Power Company (TEPCO) Fukushima Daiichi nuclear power plant,
the residents who lived in the planned evacuation zone were forced to move out. Since
then, their lives have changed dramatically. Each municipality has as independent way
of countermeasures, and the branches have been formed/established in the neighboring
cities such as Fukushima, Koriyama, Date and Iwaki. Including evacuees who have
independently evacuate, there are still close to one hundred thousand people arerecognized as evacuees spread through Japan.
Immediately after the accidents/incidents, residents faced problems which directly
affected their lives such as the health effects of radiation, place to live after theirevacuation. With the passing time, the problems which they have faced have alsochanged. Through the decontamination process, there are huge amount of waste thatare packed in flexible containers, and piled up on leasehold land. Once residents
returned to their home, they were able to see this huge amount of piles and it caused
different kind of huge stress in their lives which they have never felt while they were at
the evacuation site.
Maintaining agricultural land after decontamination is another serious problem. For
example, in Naraha town, 20 farmers returned to continue their farming/cultivation
with 700ha of land. It is impossible for them to cultivate this limited area properly.
Without management by reconstruction unions, farming organizations, or the private
sector, the decontaminated land may turn into overgrown abandoned farmland.
Although regional problems will keep changing over time, it is very important for us torecognize and understand the current situation occurring at the site.

I㸫3

[Biography]
2016:

OverallManagementofResearchon

Earthquake

Disaster

Recovery(dispatched to Iitate Town Recovery Measures Group), Head Office Planning and
Coordination Department, National Agriculture and Food Research Organization
2015:

Japan International Research Center for Agricultural Sciences

2012:

Iitate Town Recovery Measures Group2011:

Research Council Secretariat, Ministry of Agriculture, Forestry and Fisheries

2008:Japan International Research Center for Agricultural Sciences

2003:

Chugoku Land Improvement Research Management Office, Chugoku-Shikoku

Regional Agricultural Administration Office, Ministry of Agriculture, Forestry and
Fisheries
2002:

Midori Shigen Kiko

1995:

Graduated from the Department of Agricultural Engineering, Faculty ofAgriculture, Tokyo University of Agriculture (Major associations with Fukushima Prefecture)Member of a Working Group to Discuss Reduced Amount and Reutilization Methods ofRemoved Soil etc. at the Interim Storage Facility, Ministry of the Environment
Member of the Agricultural Regeneration Conference Committee at Iitate Town
Member of the Naraha Town Decontamination Investigation Committee at Naraha
Town
Member of the Minami Soma City Decontamination Promotion Committee at Minami
Soma City
Project Leader of the Agricultural Rejuvenation Project at Naraha Town
Member of the Agricultural Action Plan Development Committee at Tomioka Town
Member of the Committee to Consider Developing Reviews on the Behavior ofRadioactive Cesium in Soil, the Japanese Geotechnical Society

I㸫4Session: Environment
Temporal Variation of Radiocesium Concentration in Fresh Water inside the
Evacuation Zone and Supporting Activity for Evacuees of this Region
Tetsuo Yasutaka
Chief Scientist of National Institute of Advanced Industrial Science and Technology(AIST)In this lecture, we first report temporal variation of radiocesium concentration in theriver or stream water inside the evacuation zone. According to the monitoring results
between 2012 and 2015, radiocesium concentrations in the river water have been foundto continually decrease after the accident. In 2014, particulate radiocesium was 0.01-0.5
Bq/L and dissolved radiocesium was 0.001-0.05 Bq/L. These values showed extremely
low concentrations, which were 1/100-1/1000 of the index value set for radiocesium inthe drinking water (10 Bq/L).
Additionally, in 2016, we also started the supporting activities of the restarted flower
cultivation and related farmers in this region. We held 7 workshops in 2016. We also
reported over view and purpose of this supporting activities (see photographs below).

Experienced based agriculture

Field tour

Flower arrangement using Eustoma by Yumiko
Kanai and Shoko Okazawa

I㸫5[Biography]
October 2013 – current

Chief Researcher, Geo-environmental Risks Research Group,

Research Institute for Geo-Resources and Environment at the National Institute ofAdvanced Industrial Science and Technology
September 2013 – current (Concurrent position) Part-time lecturer (geo-environmental
engineering), College of Engineering Science, Yokohama National University
April 2012 – current (Concurrent position) Visiting researcher, Center for Material
Cycles and Waste Management Research, National Institute for Environmental Studies
April 2011 ̽ currentResearcher, Geo-environmental Risks Research Group,

Research Institute for Geo-Resources and Environment at the National Institute ofAdvanced Industrial Science and Technology
April 2008 ̽ March 2011 Kokusai Environmental Solutions Co., Ltd.
October 2005 ̽ March 2007 Doctoral Program for Working Students (while still
under the employment of Kokusai Kogyo Co., Ltd.) majoring in Risk Management andEnvironmental Sciences, Graduate School of Environment and Information Sciences,
Yokohama National University 
Expertise
Risk evaluation, testing methods, geo-environmental engineering, soil contamination,socioeconomic analysis, monitoring technology development
Committees, etc.
࣭ FY2016: Member of the 2016 Conference on Soil Measurement Techniques, etc.,
Water & Air Environment Agency, Ministry of the Environment
࣭ FY2016: Member of the 2016 Working Group for Classification Verification at theConference on Reduced Amount of Interim Storage of Removed Soil and Strategies forDevelopment of Recycling Technologies, Water & Air Environment Agency, Ministry of
the EnvironmentI㸫6

Session: Environment
Soil 137Cs Dynamics in Mixed Deciduous Forests
in Fukushima (doctoral study)
Momo Kurihara
Phoenix Leader Education Program Alumna
Post-Doctoral Researcher of AISTI studied 137Cs dynamics in forest ecosystems and the environmental parameters from
August 2013 as my doctoral study. The survey focused on 137Cs contained in litter layers
and soil to 10 cm depth in mixed deciduous forests located approximately 40 km
northeast from the Fukushima Daiichi Nuclear Power Plant. A large part of 137Cs
deposited on forest ecosystems had been translocated to litter layers and surface soils(>5 cm) via litterfall and precipitation by the beginning of the study. Spatial
heterogeneity of soil 137Cs was predicted to be largest from shortly after the accident tothe beginning of the study as results of the not only spatial heterogeneity of initialdeposition but also translocation via precipitation. By August 2014, almost 137Cs inlitter layers found had migrated into surface soil through litter decomposition processes
and leaching. The spatial heterogeneity in the surface soils became homogenous withtime because of this migration. After August 2014, 137Cs activities in the litter layers,
the surface soils and the deeper soils (<5 cm) did not change substantially. However,small amounts of dissolved 137Cs continued to migrate after August 2015. The results of
my study are useful information for developing remediation activities in forest areas,
determining appropriate radiation protection for local residents and workers, andresuming the use of the forest resources.
The talk is a summary of the doctoral thesis.
[Biography]
October 2012 – September 2016
Radioactivity Environmental Protection Course, Phoenix Leader Education Program,
Hiroshima University
October 2016 – Present
Post-doctoral researcher, Geo-Environmental Risk Research Group, Research Institutefor Geo-Resources and Environment, National Institute of Advanced Industrial Scienceand Technology

I－7

Session: Medical Support
Importance of Stakeholder Involvement during
the Reconstruction Period after Nuclear Disaster
What Kind of Radiological Information Should Be Shared?
Makoto Miyazaki
Fukushima Medical University

Numerous dose measurements have been carried out to find out the situation ofradioactive substances diffused and deposited by Fukushima Daiichi Nuclear Power
Plant (FDNPP) accident
Measurements include individual external and internal exposure doses, as well as theenvironment.
Most personal dosimetry was implemented by municipalities, and the publicized results
have revealed the overall picture of the situation after the accident. Meanwhile, theresults of individual dosimetry are transmitted mostly to individuals by only numericalvalues, and the residents themselves who measured the meaning are less likely to know.
In order to understand the meaning of the numerical value, "Explainers(Setsumei-sha)" who chewed and explain the meaning of value was required, but after
the FDNPP accident, few people stood at that position. The Explainers plays a role oflinking the meaning of numerical values difficult to understand to the residents' lives
and changing the information to information for the residents to live better. It is also
one of the roles of Explainers to inform the stakeholders of the numerical distribution
and the meaning of the individual dose of residents living in the area.
I am doing various activities after the FDNPP accident, and now I am in the field as
Explainer. From this experience, I will present how I explained the meaning of
numerical values. Furthermore, I will share the way that I communicated not only toindividuals but also to stakeholders involved in community decision-making.

I㸫8[Biography]
Makoto Miyazaki was born in Koriyama, Fukushima Prefecture, where he still lives
with his wife and twins who were born in 2011. He worked as assistant professor in thedepartment of radiology of FMU Hospital until 2011. He is a diagnostic radiologist bytraining. From 2012, He has been working with department of radiation healthmanagement at same university. Immediately after the Great East Japan Earthquake,
he had to deeply involve in radiation emergency medicine. Then, his role has moved to
explanation to residents and the government authorities. Using the measurements, he
has explained to individuals what individual dose is. For the residents in affected areas,
it is important to explain how the dose relates to his/her lifestyle choice. Also, he has
explained the measurements to the authorities, too. Because they need to know the
distribution of dose data is important.

I㸫9Session: Medical Support
Addressing Anxiety Regarding Thyroid
Cancer Screening after a Radiation Disaster
Sanae Midorikawa, Akira Ohtsuru
Department of Radiation Health Management,
Fukushima Medical University
The thyroid ultrasound examination, a component of the Fukushima HealthManagement Survey, was launched in October 2011 after the compound nuclear
disaster. The examination was initiated in response to social concerns about the healthrisks of radiation. Due to confusion in the aftermath of the disaster, a comprehensive
explanation regarding the examination could not be supplied in advance. Many
residents were insufficiently informed regarding the consequences of receiving the
thyroid ultrasound examination. Specifically, they were unaware that examination of
the thyroid gland using the latest ultrasound equipment signified unapproved cancer
screening, which could lead to potential over-diagnosis and/or overtreatment. After thestart of the examination, residents tended to have strong concerns regarding therelationship between examination results and radiation exposure in their children.
Accordingly, they, especially mothers often based decision-making on results of the
thyroid examination, even if the results were not medically significant. This sometimes
led to feelings of self-stigmatization among mothers.
Over the past 5 years, we attempted to address the psychosocial issues surrounding
thyroid ultrasound examination as a cancer screening tool. First, we held the
explanatory meetings for adults and performed class dialogues for children, respectively.
The purpose of these activities is to explain the implications of the thyroid ultrasoundexamination in the aftermath of the radiation disaster, including potential advantages
and disadvantages associated with ultrasound cancer screening targeted to youth.
Secondly, we conducted immediate post-examination individual counseling at theexamination venue. This counseling was provided to relieve anxieties regarding
examination results and to address various concerns about radiation health risks. Of
course, these strategies alone are insufficient to resolve the complex repercussions of aradiation disaster, and continuous efforts should be made to address this issue. In
conclusion, our activities aimed to encourage residents to make decisions based on
scientific evidence and to build resilience based on mutual trust. We hope that theresidents will be able to live with confidence and assurance as usual if they want.

I㸫10[Biography]
I am a clinical endocrinologist in Fukushima Medical University. I was born inFukushima, and graduated from Fukushima Medical University at 1993. After 6 years
clinical training, I have engaged in medical treatment of endocrine disorders inFukushima Medical University Hospital. After the nuclear disaster in Fukushima on
2011, I have involved in the thyroid ultrasound examination survey of Fukushima
Health Management Survey.
Present Position:
Associate Professor, Department of Radiation Health Management,
Fukushima Medical University
Director, Department of Thyroid Ultrasound Examination,
Radiation Medical Science Center for the Fukushima Health Management Survey
Education:
March 1993

M.D., Fukushima Medical University

Third Department of Internal Medicine (present Department of Diabetology,
Endocrinology and Metabolism), Fukushima Medical University
March 1999

Ph.D. (Dr. of Medical Science), Fukushima Medical University

Professional Training and Employment:
October 2001

Assistant, Third Department of Internal Medicine, Fukushima

Medical University (present Assistant Professor)
April 2008

Lecturer, Department of Diabetology, Endocrinology and Metabolism,

Fukushima Medical University
January 2012

Lecturer, Department of Radiation Health Management, Fukushima

Medical University
May 2013

Associate Professor, Department of Radiation Health Management,

Fukushima Medical University
April 2015

Director, Department of Thyroid Ultrasound Examination, Radiation

Medical Science Center for the Fukushima Health Management Survey

I㸫11

Session: Community
Current Situation after the Passage of More Than Five Years since the Great
East Japan Earthquake
Atsuko Suzuki
Social Welfare Council of Minami Soma City)

The Great East Japan Earthquake occurred on March 11, 2011, and 636 people in
Minami Soma City lost their lives to tsunami.
Then, there was the radiation leak accident, so that one month after theearthquake, areas within a radius of 20 kilometers from the nuclear power plant(Odaka ward) were designated as restricted areas.
One year later, the restricted areas in Minami Soma City (Odaka ward) werechanged to an evacuation order area. In other words, the area became a place that canbe entered during the day, but was still considered unsuitable as a place to live.
On July 12, 2016, the evacuation order in the Odaka ward was lifted.
The population in Odaka ward before the disaster was about 13,000 people. When
we look at the number of people who returned after the evacuation order was lifted, it
was about 1,000. This is less than 10% of the original population.
Immediately after the disaster, the volunteer center for the recovery efforts worked
mainly on removing tsunami debris in the areas outside of the 20 km radius from thepower plants. After the restricted area became an evacuation order area, volunteers
began working within the 20 km radius. Since plants had been left to grow freely, theOdaka ward looked like a jungle, with people not being able to enter their houses
because of all the tall grass surrounding them. Plants were also found growing on theroofs, since garden trees, which had gone untended, had extended their branches anddropped seeds onto the rooftops. These were the sights that we commonly encountered.
Even now, many volunteers come to Minami Soma City from all over Japan, andlabor with the cleanup efforts. About 80% of the volunteers come from outside of theprefecture.
Due to the disaster caused by the radiation leak, many of the generation who wereraising small children had evacuated to faraway lands, and the local hotels werepractically fully booked by workers, such as those doing decontamination work, so it
was difficult for people to stay multiple days and do the cleanup work just amongst theirI㸫12

families. In this region, it was the norm to see three generations of families living
together under one roof, but now, we seen many cases where the younger generation
remain at the location where they evacuated to, with only the older generation
returning to their homeland.
When we look at what needs are most prevalent right now, they are the separating,removing, and bagging of waste, grass-cutting, and tree trimming, among others.
Minami Soma has a Clean Center within its city, but the waste from Odaka ward was
not allowed to be processed at this center until the evacuation order was lifted. We had
to contact the Ministry of Environment and have them pick up the waste, upon having
informed them in advance of the amount of burnable, non-burnable, and large wastethat we had, as well as the details of home appliances that had to be disposed of.
Havoc was wreaked by mildew and mice in houses that had remained unpopulated
for more than one year, and the waste that came out from one house amounted to about
200 to 300 90-liter-sized garbage bags. This is about 20 to 30 flexible container bags thatcan fit one ton of waste. In many of these households, family members had dispersed forevacuation, making it difficult to complete this level of cleanup by just the remaining
family members, and so, they needed the help of the volunteers.
From 2014, the hospital resumed operations, and dining places also opened. In thecurrent Odaka ward, the railroad for the Joban Line train going to Sendai wasrecovered, and a train was seen running through the area on the day when theevacuation order was lifted. There are a variety of efforts being made, little by little, totake back the lifestyle that the area had before the disaster. But the road to recovery isvery slow, with too many things that make it inconvenient for people to live in this area.
Even though the evacuation order has been lifted, this area still does not have asupermarket. We have a hospital, but no pharmacy. We now have ride-sharing taxis, butthere are no regular taxis in the Odaka ward. These types of things that are normal in
everyone else’s lives are still not available in the Odaka ward.
What can we do to have the younger generation willingly live on this land with asense of reassurance? What we need are probably accurate information on the current
environmental radiation level and correct knowledge that are not susceptible to rumors.
We have monitoring posts in all different places throughout the city, and theweather report in Fukushima prefecture also gives numerical information on theradiation levels of various areas.
We are starting to see a variety of ideas generated from local residents and people
visiting Odaka on how to bring everyday life back to this area. A local specialty shop hasI㸫13

opened, and there has been the development of cooking oil, mayonnaise, and soap madefrom field mustard. A studio for making glass accessories has opened as a means forproviding work to young women, and other trial attempts are popping up. However,everyone has aged by five years since the day of the disaster. There is an urgent need tocreate a framework that allows the elderly to live with a sense of reassurance.
While local houses are being torn down one after the other, we are also starting
notice renovated and newly built houses. The beautifully rebuilt houses make us thinkof the persons who would come back to inhabit those houses. When we see more of thesehouses, it makes us think that there may be more people who are thinking of returning
to their homelands.
During the summer Obon holiday period, we saw many families with small children
in this area. The liveliness of that scene made us wish that this were something normal
to be found in our daily lives.
This year in April, the elementary school, junior high school, and high school will be
reopening in the Odaka ward.
There were many who voiced their disapproval for lifting the evacuation order on
this area. But now that it has been lifted, we fervently hope that our national
government would give out accurate information and send support so that the people
here will be able to live with a sense of security and reassurance.

I㸫14

[Biography]
Born March 11, 1966
April 1992
Joined the Odaka-machi Social Welfare Council
January 2006
Employer changes name to Minami Soma City Social Welfare Council due to the mergerof towns
Appointed to the Local Welfare Division
September 2011 Becomes Manager of the Local Welfare Division
April 2014
Appointed as Head of the Disaster Recovery Volunteer Center and begins working in
the Odaka ward
April 2016
Minami Soma City Social Welfare Council’s Odaka Ward Welfare Service Center
resumes operations
Appointed as Head of the Odaka Ward Welfare Service Center in addition to being theHead of the Disaster Recovery Volunteer Center

I㸫15

Session: Community
Developing a Common Language after the Nuclear Accident:
The Experience of Suetsugi Area in Iwaki City
Ryoko Ando
Representative of Ethos in Fukushima The disaster that occurred on March 2011 at the Tokyo Electric Power Company’s
Fukushima Daiichi Nuclear Power Plant resulted in spreading radioactive substances
into the environment and having a great impact on the lives of the people. Radiation
and radioactive substances, which penetrated deep into our livelihoods, wreaked havoc
in the people’s lives. But what caused the greatest turmoil was in the lack of common
language when discussing radiation and radioactive substances. This issue was raised anumber of times as a problem in risk awareness. But in the face of reality, this issue of
not having the vocabulary to talk about what was actually happening became a greaterand a more essential problem in our daily lives. The effects of radiation are events thattake place in the world of physics, and require having an understanding of abstract
phenomenon that is far removed from our everyday life. Thus, it was difficult to come up
with the vocabulary from our everyday life to express the effects that radiation had
upon our lives, and required us to go through a number of processes in order for us to beable to talk about it amongst ourselves.
 The Suetsugi area, located at the northern edge of Iwaki City about 27 kilometers
away from the Fukushima Daiichi Nuclear Power Pant, has been continuing to monitor
radiation in its local area since spring of 2012. The monitoring activities are conductedby local participants, with the help of Fukushima’s Ethos, a volunteer group that wasestablished after the nuclear disaster. Members of the group work consistently tomeasure the actual amount of radiation exposure that they themselves have, in
addition to measuring the radiation level in their normal living environment, and use
the results to hold discussions with experts and supporters. Through the continuation ofthis work, we have made it possible for people to talk about radiation, not just in
general terms, but using words that have more relevance to the people who live in thatenvironment. I would like to talk about the four years of experience that the Suetsugi
area has had in creating such common language.

I㸫16

[Biography]
Born in 1976 in Hiroshima Prefecture. Married her husband, who was born in Minami
Soma City of Fukushima Prefecture, and has been living in Fukushima Prefecture since
2002. After the Fukushima Daiichi Nuclear Power Station disaster in 2011, sheestablished Ethos in Fukushima, an organization with residents conducting radiation
preventative activities.

I㸫17

Session: Community
Current Situation and Issues on the Restarted Cultivation of Eustoma in the
Evacuation Zone
Akihiko Hirono
Flower Farmer in Fukushima

After the Tokyo Electric Power Company’s Fukushima Daiichi Nuclear Power Plant
accident caused by the Great East Japan Earthquake, the Yamakiya region in the
Kawamata town was designated as an evacuation zone and continues to be as ofJanuary 2017.
Manufacture and sale of the Eustoma have been seriously restarted from 2015 since noimpact of radiocesium was found in the test cultivation in 2014. The presenter worked
in the Tokyo Flower Market and returned with his family to the Yamakiya region to
resume their flower cultivation in 2015 and work with them in 2016. In 2016, we also
started the collaborative activity of experience based agriculture with some researchers.
Fortunately, present sales have recovered to the pre-accident level and the influence ofthe reputation damage was not so high, however there some problem.
First problem is that securing labor is a big challenge during busy periods. Moreover,since estimated returning population is not so large after the cancellation of theevacuation order, drastically depopulation and aging population combined with thediminishing number of children may be occurred. As a result, following issues may be
faced: difficulty of maintenance of agricultural land (mainly paddy field) andagricultural facilities resulted from labor shortage and secure the infrastructure such as
medical institutions, schools and commercial facilities for daily life in the region.
Reputation problem may also be raised for producing food crop. We now faced not only
environmental problem but also social, economical and regional problem.

Experience based agriculture

Blooming Eustoma

I㸫18

Session: Community
The Berkeley Institute for Resilient Communities:
Combining Science, Education, and Communities
Kai Vetter
Director of Institute for Resilient Communities,
Lawrence Berkeley National Laboratory

Resilience is the key to a prosperous global and modern society; Efforts to mitigate
physical damage, economic loss, and to protect social and political infrastructures in
response to catastrophic events, such as a nuclear accident or a natural disaster, areessential for communities to survive and thrive in the aftermath of such incidents. The
2011 Fukushima Dai-ichi Nuclear Power Plant accident serves as an example of therisks associated with advanced technologies and the need to minimize physical as well
as psychological effects on local and global communities. Other examples can be foundreflecting the misperception of risks such as associated with vaccination or Genetically
Modified Organisms or GMOs. While we have to recognize the risks associated with thedevelopment, implementation, and utilization of advanced technologies, we also have torecognize that the impact of not adopting them can have much more detrimental effects
to individuals, communities, and even societies. We have established the Institute for
Resilient Communities in Berkeley in collaboration with Japanese partners to address
the needs for better scientific and technological capabilities to assess, predict, andminimize the impact of disruptive events in the future and to enhance theunderstanding of associated risks in the public. While the initial focus resides inradiological resilience and is closely related to the events in Fukushima more than 5
years ago, the goal is to establish a broader framework for researchers, educators, andcommunities to enhance resilience locally and globally.

I㸫19[Biography]
Dr. Kai Vetter is Senior Scientist and Head of the Applied Nuclear Physics program at
the Lawrence Berkeley National Laboratory and Professor-in- Residence in the
Department of Nuclear Engineering at the University of California, Berkeley. He
obtained his Ph.D. in Nuclear Physics at the University of Frankfurt in Germany.
Professor Vetter’s main research interests are in the development and demonstration of
new concepts and technologies in radiation detection to address some of the outstanding
challenges in fundamental sciences, nuclear security, and health. He oversees a wide
range of developments in gamma-ray detection and imaging and the fusion of nuclear
with complementary data that relevant for example in the mapping of contamination in
Fukushima or the verification of ion-cancer therapy. He is also the Director of theInstitute for Resilient Communities that was established in 2015 to address the need tobetter integrate advancements in sciences and technologies with communities througheducation and outreach locally and globally. It reflects his activities in Fukushima,
Japan, and is based on a partnership with several research institutions and universities
in Japan and the City of Koriyama. He has authored and co-authored more than 150
publications in peer-reviewed journals and is fellow of the American Physical Society.

I㸫20

Session: Concluding Lectures
Key Elements of Public Health Protection ina Nuclear or Radiological Emergency
Wolfgang Weiss and Zhanat Carr (WHO)Former Head of Department Radiation Protection and
Health of Federal Office for Radiation Protection (BfS)

By definition “health is a state of complete physical, mental and social well-being andnot merely the absence of disease or infirmity” (WHO). Evidence about healthimpairment is available for a large spectrum of unwanted events, eg. chemical andnuclear accidents, natural disasters or infectious diseases.
For the purpose of radiological protection in emergency exposure situations, ICRP
recommends to use “reference levels, which should be set in the band of 20–100 mSv
effective dose (acute or per year). ICRP considers that a dose rising towards 100 mSv
will almost always justify protective measures. A detailed set of generic dose criteria(emergency action levels, operational intervention levels) is recommended by IAEA as
the basis for planning preparedness and response actions (General Safety
Requirements No. GSR Part 7 and General Safety Guide No. GSG-2). No detailed
recommendations are available how to assess individual risks at low doses and to
consider the known differences in the susceptibility of special groups of the population
to radiation exposures, eg. children, during response.
Available evidence from major nuclear accidents shows that it is necessary to broaden
the view beyond radioactive dose, to include additional considerations of the impact of
nuclear accidents on public health to achieve a situation in which the benefits ofjustified RP protective measures overall outweigh their risks and the harm they cause
to individuals and to the society, eg. “do more good than harm”.
Serious health effects and disaster-related death (DRD) among vulnerable groups of theaffected population have been reported after the Fukushima accident. DRD is definedas death caused by the deterioration of medical response due to poor medical access orillnesses arising from poor living environments (such as temporary shelters) or by
evacuation of inpatients and elderly people at nursing care facilities without sufficientI㸫21

medical care and food supply. The WHO has looked into the evidence base for basic
interventions as evacuation and sheltering in case of nuclear emergencies andconcluded that the evidence base is insufficient, therefore there is a research gap thatneeds to be addressed by indirect evidence and simulation studies.
Various risk factors for an increase of human vulnerability to disaster-related morbidity
and mortality have been observed during many major accidents. Examples are low
income, low socioeconomic status, lack of home ownership, single-parent family, age(older than 65 years, younger than 5 years), gender, chronic illness, disability, and social
isolation or exclusion (stigma). Access to health-care for the affected populations
residing in temoporary accommodations, who lost jobs and associated health insurance
coverage also can represent a challenge, especially for chronically ill persons. In
addition, lifestyle-related health problems during emergencies have been identified.
They may be related to reduced physical exercise, smoking and alcohol habits, increased
risk factor for cardiovascular disease, such as obesity, hypertension, diabetes mellitus
and dyslipidaemia.
Evidence for mental health and psycho-social consequences is available from many
major emergencies. They may result from drastic changes in living environments withsignificantly long periods of relocation and separation of families/communities. The
most common mental health consequences are anxiety, general distress, post-traumaticstress disorder, depression, medically unexplained somatic symptoms (e.g. fatigue,
severe headaches, muscle and join pain), and stigma as seen from Chernobyl and
Fukushima experience.
Increasing the ability of governments and other stakeholders to address the known
social determinants and reduce the health inequities is a high priority area; it requires
focussed research activities as well as involvement/improvements in the capacity of thehealth sector to identify, promote and implement action on social determinants of healthand health equity – both within their own functions and programmes as well as throughcoordination and alignment with other sectors.
There is an urgent need to develop a comprehensive, multi-sectoral long-term approach,which considers both physical and psycho-social consequences of nuclear/ radiologicalemergencies as well as the options to deal with them in an optimised fashion. Keyemphasis for the future activities is to develop an international framework and identify

I㸫22

possible options for mitigating adverse psycho-social and mental health outcomes after
a nuclear emergency. The aim of such a development will be to establish an evidencebase for assessing health equity outcomes from radiation accidents and forunderstanding the factors leading to disparities in exposure and its consequences. Key
areas of the required expertise are radiation protection, medical support (especiallyprimary care and emergency medicine, mental health support), social sciences(anthropology, psychology, ethics), and communications experts. While the number ofdead, injured, or hospitalized victims of an emergency can be counted, it is much moredifficult to quantify and assess the psychological and social health implications. There isa need to agree on key criteria, approaches and methodologies for evaluating andmanaging the impact of anxiety, depression, social disruption, or family hardship, which
nuclear emergencies and consequent interventions may trigger.
There is a need for training of the radiation protection community in general, radiation
protection professionals, and public health specialists with respective responsibilites inplanning and managing radiation emergencies on psycho-social and mental healthimpact and its mitigation before, during and after emergency. In particular there is aneed to raise the awareness within the professional community about the available
evidence and knowledge on social determinants of health and how these could beapplied to management risk associated with consequences of radiation emergencies.

I㸫23

[Biography]
Professional and occupational background:͌Physicist, Dr. rer. nat., University of Heidelberg;
͌1980-2000: Director, Institute for Atmospheric Radioaktivity, Freiburg;͌ 2000 to August 2012: Federal Office for Radiation Protection (BfS), Head of
Department Radiation Protection and Health, Neuherberg/Munich;Membership in national and international organizations
͌German Commission on Radiological Protection (SSK)͌ UNSCEAR (chair 2011-2012, chair of the Coordination Expert Group for the
Fukushima Assessment);͌ OECD/NEA – CRPPH (committee for radiological protection and public health;member of the bureau);͌Honorary member of MELODI;
͌Former member of ICRP, C4 (chair of TGs preparing Publications ICRP 101, 109, 122);
͌Chair of the International Programme Committee for IRPA 15 (Seoul 2010).
Holder of the Order of Merit of the Federal Republic of Germany.

I㸫24

Session: Concluding Lectures
The Gap between Radiation Science and Perception People
Ohtsura Niwa
Chairman of Radiation Effects Research Foundation (RERF)

Natural science on the effects of radiation on human health is well developed in the past
70 years and a large proportion of the results came from the epidemiological studies ofatomic bomb survivors and their offspring. The studies have indicated the lack of
discernable health detriments among children of the survivors and dose dependent
increases of cancer among directly exposed survivors. These results have been verified
by independent studies by others and the atomic bomb survivor studies are now
regarded as gold standard in the field of radiation science.
Although science of radiation health effects is thus well established, the public
perception of radiation is tightly connected to the image of atomic bomb. The image ofradiation is inseparably connected with that of atomic bombs. In addition, humancannot sense radiation. Thus, when placed in a situation with radiation, people do notknow how to cope with radiation. When confronted with something to which people has
no control, people fear and lose confidence on themselves. This is exactly what happened
to people in Fukushima where people were suddenly surrounded by radiation to which
they did not have any way to fight back. They were tied up with a situation they cannot
handle. This means that they are not the one to control, but to be controlled by thesituation, and such a situation makes people to lose confidence on themselves. Scienceof radiation health effects, however good, cannot help such people unless those talking
them on science are trusted. Also, the only way for such people to regain confidence is tohelp them to take action. Science and scientists can only be of use, with trust and to
working together with people especially when people are confronted by serious disastersuch as Atomic Bombings and Fukushima Daiichi Nuclear Accident.

I㸫25

[Biography]
Ohtsura Niwa obtained B.Sc. from Kyoto University in 1967 and Ph.D. from Stanford
University in 1975. He worked at Hiroshima University, Kyoto University, National
Institute of Radiological Sciences, and Fukushima Medical University until June of2015. He is currently working at the Radiation Effects Research Foundation in
Hiroshima and Nagasaki. He spends most of his research carrier studying genetic
effects of radiation, especially induction of dynamic mutations (untargeted mutation) inmice, using minisatellite sequences and the pink eyed unstable allele. After moving toFukushima Medical University in 2012, his interest shifted from science of radiation
effects to the impact of radiation on people’s daily life.

I㸫26

Panelists
Panel Discussion
February 12, 201715:50 –17:20

May Abdel-Wahab

Director of the Division of Human Health at theInternational Atomic Energy Agency (IAEA)

May Abdel-Wahab, MD, PhD is the current Director of the Division of Human Healthat the International Atomic Energy Agency, Vienna Austria. She has over 30 years ofpatient care, teaching and research experience in the field of radiation medicine. Before
joining IAEA she was section head of GI Radiation Oncology at the Cleveland Clinic,
USA and Professor at the Cleveland Clinic Lerner School of Medicine, Case Western
University. She has served, both as a member and chair, on various National andInternational committees. She has also served on advisory boards and professional
journal editorial boards

She is a fellow of the American board of Radiology and wason the Best doctors in America listing, among other honors. Dr Abdel-Wahab has been
an avid lecturer and participant on scientific panels. She has also served on expert
panels for treatment guidelines and published widely (over 150 publications). She has a
special interest in education and curriculum development as a former residency
program director and has organized numerous symposia and scientific meetings. In
addition, she has an interest in healthcare access and training, as well as novel
solutions to address disparity and diversity issues.

II㸫1

Thomas E. Johnson
Associate Professor
Colorado State University

Dr. Johnson has extensive experience in radiation safety, nuclear detection methods,
and power plants. The last 15 years Dr. Johnson has spent in academia performing
research in diverse areas of radiation safety including environmental, medical, anduranium mining. He has authored or co-authored over 30 peer reviewed papers, threebooks, and mentored over 30 graduate students. He has been responsible for multiple
research projects funded by the Department of Defense, Nuclear Regulatory
Commission, Department of Energy, United States Department of Agriculture, andother agencies. Dr Johnson has a PhD in Health Physics from Purdue University, is a
CHP, NRRPT and CLSO. He was appointed to the Radiation Advisory Committee for
the State of Colorado in 2010, and elected chair of the committee in 2015. Prior to
obtaining his current position at Colorado State University, he was an assistantprofessor at the Uniformed Services University. In addition to his academic duties, Dr.
Johnson was an active member of the United States Air Force reserves until 2009 when
he retired at the rank of major. Dr. Johnson also served for six years in the UnitedStates Navy, as an engineering laboratory technician, on the nuclear powered
submarine USS Cavalla.

II㸫2

Thierry Schneider
Director of Nuclear Evaluation Protection Center (CEPN)

Thierry SCHNEIDER is Director of CEPN since January 2017. He got a PhD in
Economics, in the field of health and insurance. He has been involved in a number ofprojects related to the assessment and management of the radiological risk. Since 1990,
he is involved in the methodological and practical developments related torehabilitation of living conditions of the populations living in territories contaminatedby the Chernobyl accident and since November 2011, he is participating to the ICRP
Dialogue Initiative in the Fukushima Prefecture and research projects in cooperation
with several Japanese Universities.
He is currently President of the French Society for Radiological Protection (SFRP),
Vice-Chair of the Committee on Radiation Protection and Public Health (CRPPH –NEA/OCDE), President of the European NERIS Platform Association and member of
ICRP task groups on ethics and on emergency and post-accident management.

II㸫3

Albert L. Wiley, Jr., BNE, MD, PhD, FACR
Medical and Technical Director of REAC/TS, and Head of theWorld Health Organization (REMPAN) Collaborating Center at
Oak Ridge
Emeritus Professor of Human Oncology and Radiology,
University of Wisconsin-Madison

Albert L. Wiley, Jr., BNE, MD, PhD was reacts director (2004-2016) and now is senior
physician and scientific advisor at REAC/TS and Head, WHO Collaborating Center at
Oak Ridge. He was also a committee member and lead writer for medical sections of the
UNSCEAR and the IAEA Comprehensive Reports on the FUKUSHIMA Accident. His
professional career began as a Nuclear Engineer with a Bachelor of Nuclear
Engineering and an AEC (ORINS) sponsored fellowship for nuclear engineering
graduate studies at North Carolina State University. He worked in the nuclear industry
prior to obtaining an MD degree from University of Rochester School of Medicine, andlater a PhD in Radiological Sciences (radiobiology) from the University of Wisconsin
Graduate School of Letters & Science. He received residency training in Radiation
Therapy & Nuclear Medicine at the University of Wisconsin Medical Center and at the
Stanford University Medical Center in Palo Alto, Calif. He is currently Professor
Emeritus at the Department of Radiology & Human Oncology at the University of
Wisconsin – Madison and was, prior to coming to REAC/TS, professor and chairman of
the Department of Radiation Oncology, and Cancer Center interim Director at East
Carolina University, Greenville, NC. He has over 180 journal, book and abstract
publications in radiation oncology, nuclear medicine, radiobiology and radiation
medicine. In recent years he has served as the medical team leader on NNSA sponsoredtraining and exercises in Iraq, Kuwait, Korea, South Africa, Morocco, Vienna (IAEA),
Argentina, Israel, Mexico, Ukraine, Singapore and Japan, and the NNSA (DOE)
medical representative at the RADCC launch control team for the NASA Mars Science
Lab and the Pluto launches. He is also a retired member of the USN Reserve (retired).
For more curriculum vitae, check the following
website䠖http://orise.orau.gov/reacts/symposium/speakers/Wiley.html

II㸫4

Abstracts
Student Oral
Presentations
February 11, 201712:35 –14:45

Phoenix Leader Education Program (Hiroshima Initiative) for
Renaissance from Radiation Disaster the 6th International SymposiumStudent Oral Presentation Schedule: February 11, 2017
Abstract
No

Time

Name

1

12:3512:50

MasayaTsujimto2

12:5013:05

Scott Braley3

13:0513:20

Ryan
Pavlovsky

4

13:2013:35

ChryzelAngelica B.
GonzalesHiroshima Investigation on Retrospective Dose Assessment of Medical
University Radiation Exposure

5

13:3513:50

Vivien Miller

Colorado Model-Based Analysis of the Cesium Dynamics in the Small
State
Mesotrophic Reservoir Pond 4: Stochastic Evaluation of
University Discrete Atom Movement

Institution Name

Oral Presentation Title

Hiroshima A Rice Growing Phase of Cesium Absorption in the Paddy in
University Fukushima
Colorado
Applying BEIR VII Risk Factors to Evacuation and Reoccupation
State
Decision Making
University
University
Radiation Mapping and 3D Reconstruction with LAMP inof California
Handheld/Aerial Packages
Barkley(Break Time: 13:50 - 14:00)
6

14:0014:15

NobuakiMoriyama

Hiroshima Health Issues Caused Indirectly by the Fukushima Accident: A
University Mediator’s Role from the Point of View of Health Science7

14:1514:30

Kyle Bilton

University
Gamma-ray Source Localization and Mapping Using Unmannedof California
Aerial Vehicles
Barkley8

14:3014:45

Ooki Kurihara

Hiroshima A Study on Coastal Disposal Facility for Soils and Wastes
University Contaminated with Radioactive Cesium

No.1

A Rice Growing Phase of Cesium Absorption in the Paddy
in Fukushima
Masaya Tsujimto1, 2, Sunao Miyashita1, 2, Nguyen Thanh Hai1, 2,
and Satoru Nakashima1, 2, 3
1 Graduate School of Science, Hiroshima University
2 Phoenix Leader Education Program, Hiroshima University
3 Natural Science Center for Basic Research and Development, Hiroshima University

Keywords: food safety, cesium, potassium, rice growing, Fukushima
Since Fukushima Daiichi Nuclear Power Station (FDNPS) accident in March, 2011,
food-safety matter has been argued in Japan. In particular, Fukushima is one of the prefectures
primarily producing rice as Japanese staple, and the agriculture is a basic industry in Fukushima.
Therefore, it is important to monitor the radioactivity of cesium derived from the nuclear accident inpaddy soil and rice even now. In order to prevent rice plants from absorbing the cesium, potassium
chloride has been distributed into paddies after the accident. This is because potassium and cesium
are the congener each other in the periodic table and have a similar chemical behavior, and possibly
cesium goes out of the absorption. However, potassium chloride is soluble and likely to be lost in thepaddies which are often refilled with irrigation water. That is why it is significantly important toinvestigate the rice growing phase of cesium absorption and to suggest an appropriate timing ofadding potassium chloride. In this study, we aim to reveal the correlation between rice growing andconcentration (radioactivity) of cesium and potassium in the rice plants.
The fieldwork was held in the paddy in Fukushima City, which is northwest approximately
60 km far from FDNPS. The sampling of paddy soil and rice plants was performed, and the plant
length and SPAD* value were measured as indicators of rice growing repeatedly seven times in April
through September, 2016. The samples were first dried at room temperature. The paddy soil wassieved by 2 mm-mesh to eliminate gravel (> 2 mm) and pieces of organic matter, while the rice plants
were separated into roots, leaves, and ears and chopped into small pieces. All samples werecompletely dried again at 105 °C by oven and packed in U8 vessels. Then eventually, they were
measured for 137, 134Cs and 40K by Ge semiconductor detector.
The results of radioactivity measurement indicate the different trend of the concentration ofpotassium and cesium between the roots and leaves. Both elements were competitively absorbed by
the roots. On the other hand, they were transferred into the leaves on the same way as the congeners.
The concentration of potassium and cesium has changed through the rice growing.
*SPAD stands for “Soil and Plants Analyzer Development”, and this value has the proportional
relation with the amount of chlorophyll.

㻌
Ⅲٕ1

No.2

Applying BEIR VII Risk Factors to Evacuation and Reoccupation
Decision Making
G. Scott Braley
Colorado State University
Keywords:Evacuation, reoccupation, risk factors, BEIR, radiation
Planners and emergency managers can turn to a large body of national and international guidanceon evacuation, dose projection, and cleanup in order to prepare for a radiological or nuclear disaster.
Relatively little guidance, however, focuses on returning evacuated populations to their homes. In
the United States, the Environmental Protection Agency suggests that “[e]xposure limits in a rangeof one in a population of ten thousand (10-4) to one in a population of one million (10-6) excess lifetime
cancer incidence outcomes are generally considered protective.” The Biological Effects of Ionizing
Radiation VII (BEIR VII) report includes tables listing the morbidity and mortality risks of allcancers by age and gender. The present effort examines the effects of applying the BEIR VII risk
factors to populations matching the demographic profiles of Japan, the United States, and Germany,and how those factors could be utilized in evacuation and reoccupancy decision making.

㻌
Ⅲٕ2

No.3

Radiation Mapping and 3D Reconstruction with LAMP in
Handheld/Aerial Packages
Ryan Pavlovsky
Haefner, Andy; Joshi, Tenzing; Bilton, Kyle; Negut, Victor;
Vetter, Kai
Lawrence Berkeley National Lab / University of California, Berkeley
Keywords: Gamma-ray mapping, 3D reconstruction, hand-held, aerial, drone
The Localization and Mapping Platform (LAMP) is a flexible and configurable suite of radiation
detectors coupled with contextual sensors for simultaneous mapping of gamma-ray emitters and 3D
scene generation. This technology provides much more rich data when compared to traditionaldose-rate/count-rate mapping schemes and could provide specific information for decontamination
efforts. LAMP can map both indoor/outdoor environments. We built and demonstrated the operationof this package in hand-held and aerial/drone-based proximity mapping scenarios. Here we present
preliminary results from these implementations as well as a discussion of planned improvements
and measurements.
~30uCiCs137

3D model of
scene

and

house

~30uCiPreliminary

Ba133

Figure 1: Walking data from LAMP. (Left) A 3D scene pointcloud from LIDAR data collected on the
LAMP package while surveying an unoccupied house at the University of California Richmond Field
Station. (Right) Preliminary radiation data fused with 3D scene and colored for gross count rateintensity on the pointcloud. The true source locations are noted in the figure.

㻌
Ⅲٕ3

No.4

Investigation on Retrospective Dose Assessment of Medical
Radiation Exposure
Chryzel Angelica B. Gonzales*1,2, Hiroshi Yasuda2,3, Yasushi Nagata2,4
Phoenix Leader Education Program (Hiroshima Initiative) for Renaissance from
Radiation Disaster1; Graduate School of Biomedical and Health Sciences,
Hiroshima University2;

Department of Biophysics, Research Institute for

Radiation Biology and Medicine, Hiroshima University3; Department of Radiation
Oncology, Institute of Biomedical and Health Sciences, Hiroshima University Hospital4
Keywords: retrospective dosimetry, radiation therapy, esr, osl
Many techniques for retrospective dosimetry have been developed for assessing past andunexpected radiation exposures. These techniques could be divided into two major categories: (1)Bio-dosimetry uses biological samples (e.g. blood) as biomarkers for estimation of absorbed doses and(2) Physical dosimetry wherein it uses some other solid biological (e.g. nails, teeth, etc.) or fortuitousmaterials (e.g. mobile phones, accessories, etc.) that a person may carry in his/her body are utilized(re phrase). Though the latter category is considered to be more accurate than the former in general,
only a few studies have been undertaken on the application of physical retrospective dosimetry
methods to medicine. Thus, this study attempts to establish a practical approach for assessing apatient’s dose by using a retrospective dosimetry technique for medical interventions, for radiation
therapy procedures in particular. As a first attempt, we investigate the use of the electron spinresonance (ESR) signals of biological samples in comparison with the responses of commerciallyavailable personal dosimeters and also with the absorbed doses calculated by the radiotherapy
treatment planning system (TPS).

㻌
Ⅲٕ4

No.5

Model-Based Analysis of the Cesium Dynamics
in the Small Mesotrophic Reservoir Pond 4:
Stochastic Evaluation of Discrete Atom Movement
Miller, V., Johnson T., Pinder J.
Colorado State University,
Department of Environmental and Radiological Health Sciences
Keywords: radionuclide, aquatic model, Markov chain, cesium
The mathematical modeling of the passage of radionuclides through ecosystems after initial
release into the atmosphere or water column typically has employed continuous mathematics suchas ordinary differential equations whereas in reality, the process involves discrete movements of theindividual atoms of the released radionuclide. These movements are random and generally occur
with low probabilities.

The latter observation is supported by results regarding compartment

retention from the Pond 4 kinetic model as described in “Model-Based Analysis of the Cesium
Dynamics in the Small Mesotrophic Reservoir Pond 4 I. Development of a Rate-Based Kinetic Model”
by Jeong, et. al (in review). However, there has been little investigation of the extent to which therandom and improbable behavior of discrete units (such as atoms) modifies, describes, or controls thevariation within the components of the system.

In this analysis we assess the discrete atom

behaviors in influencing the midterm and long term distribution of Cs among the components using
the robust and well documented experimental release of 133Cs into the 11.4 ha reservoir Pond 4.
This discrete behavior is modeled through the use of a Monte Carlo Markov Chain simulation. The
result is stochastic in that no two releases of individual atoms result in the same distributions ofatoms among the components or the same fluxes of atoms along pathways through the system.
Preliminary results suggest that the largest relative variability occurs 1) during time periods when
components have smaller inventories of Cs and 2) for those components with smaller retention
probabilities of retaining the Cs atoms per unit time.

㻌
Ⅲٕ5

No.6

Health Issues Caused Indirectly by the Fukushima Accident:
A Mediator’s Role from the Point of View of Health Science
Nobuaki Moriyama, Yukio Urabe, Noriaki Maeda
Hiroshima University
Graduate School of Biomedical and Health Sciences, Sports Rehabilitation
Keywords: Health issues, Fukushima accident, mediator’s role
The Fukushima Daiichi Nuclear Power Plant accident raised citizens’ anxiety/fear regarding its
effects on health, for example due to direct exposure to radiation, and the large-scale movement oflocal citizens.1 A previous study reported that although the internal and external exposure levels of
local residents after the Fukushima accident were too low to cause concern for a direct effect on
health, deteriorating chronic conditions (e.g. increased prevalence of diabetes) was persistent after
the disaster.2 Although various potential causes could explain the deterioration of their health, there
is no consensus on the cause.
Meanwhile, authors have identified low physical activity levels in observed evacuees in temporary
housing in the City of Minamisoma as a factor of deteriorated physical performance.3 Previous
studies also suggested that physical inactivity may be a risk factor for health deterioration; lack ofphysical activity has been found to contribute to an increased risk of non-communicable diseases,4and may promote frailty.5 Therefore, decreased physical activity in older evacuees in temporary
housing is a serious health-related problem to be solved.
To prevent this negative chain in the health of affected people, support for them should be focusedon improving their circumstances, including providing easier access to medical facilities and homehealthcare in affected areas, and raising awareness by encouraging them to maintain their
physically active lives. It is suggested that direct communication with affected people for better
mutual understanding could be a role for a mediator in the Fukushima accident recovery processfrom the point of view of health science.
References
1. Hasegawa A, et al. Health effects of radiation and other health problems in the aftermath of
nuclear accidents, with an emphasis on Fukushima. Lancet. 2015;386:479-488. 2. Tsubokura M.
Exposure and current health issues in Minamisoma. Annals of ICRP. 2016. 3. Moriyama N, et al.
Effect of residence in temporary housing after the Great East Japan Earthquake on the physicalactivity and quality of life among older survivors. Disaster Med Public Health Prep. (in press). 4. Lee
IM, et al. Effect of physical inactivity on major non-communicable diseases worldwide: an analysis ofburden of disease and life expectancy. Lancet. 2012;380:219-229. 5. Fried LP, et al. Frailty in older
adults: evidence for a phenotype. J Gerontol A Biol Sci Med Sci. 2001;56:M146-156

Ⅲٕ6

No.7

Gamma-ray Source Localization and Mapping

Using Unmanned Aerial Vehicles

Kyle Bilton; Haefner, Andy; Joshi, Tenzing; Pavlovsky, Ryan; Negut, Victor;
Vetter, Kai
Lawrence Berkeley National Laboratory / University of California, Berkeley
Keywords: Gamma-ray mapping, source search, LiDAR, scene reconstruction, drones
The use of gamma-ray detectors in combination with contextual scene information has been exploredon small unmanned aerial vehicles (UAVs) to enhance wide area radiation source localization andmapping capabilities. The Localization and Mapping Platform (LaMP) improves source localization
capabilities by integrating data from scintillation detectors, visual cameras, and LiDAR, among
other sensors. Applications for UAV detection platforms such as LaMP include environmental
monitoring, nuclear contamination remediation, and nuclear security and safeguards. Current
capabilities of LaMP are discussed, including scene reconstruction and field tests using sealed
radioactive sources.

Ⅲٕ7

No.8

A study on Coastal Disposal Facility for Soils and Wastes
Contaminated with Radioactive Cesium
Ooki Kurihara1) and Takashi Tsuchida2)
1) Graduate School of Engineering, Hiroshima University
2) Institute of Engineering, Hiroshima University
Keywords: waste disposal facility, contaminated soil, sealing layer, marine clay, hydraulicconductivity, adsorption
The safe disposal of waste generated in the process of decontamination around Fukushima Daiichi
Nuclear Power Plant is a pressing issue. The objective of this study was to develop a sealing material
that can be used as an engineered barrier for a final disposal facility for soil and waste contaminatedwith radioactive cesium at a concentration less than 100,000 Bq/kg. The analysis performed on thebasis of 4-m-thick sealing layer found that the hydraulic conductivity of the sealing material should
be maintained at 5.0×10ï10 m/s or less, in order to avoid the leakage of contaminant over theenvironmentally safe limit. The sealant was developed using marine clay-bentonite mixture and theengineering properties were investigated. As a result of laboratory experiments, the hydraulicconductivity decreases due to the addition of bentonite, and when the effective consolidation stress is
27 kPa or more, the hydraulic conductivity becomes 5.0×10ï10 m/s or less. From the adsorption
property test for cesium, the sealant showed remarkable adsorption ability to cesium in seawater. It
was concluded that it is possible to construct a waste disposal facility on the sandy seabed with thesealing layer proposed in this research.

Ⅲٕ8

Abstracts
Student
Flash Presentations
February 11, 201714:45 –16:20
Poster Presentations
16:30 –18:20

Phoenix Leader Education Program (Hiroshima Initiative) for
Renaissance from Radiation Disaster the 6th International Symposium

Graduate Student Flash Presentation Schedule: February 11, 2017
Time No

Name

Presentation Title

Catalytic Impacts of Long-term Evacuation upon Post-disaster Chronic Health of
1 Chowdhury Abu Sayeed Elderly Generation in Fukushima: Findings from the 14th Fukushima Short Field
Visit
A Social Cognitive Perspective of Radiation Risk Perception and Risk Information
2 Tsegmed Otgonchimeg Seeking Behavior of People in the Context of Fukushima Disaster: Towards Better
Public Oriented Risk Communication
Microbial Precipitation of Cesium and Other Nuclides by Cultures ofManganese Oxidizing Bacteria

3Linh Thi Thuy Cao

4

Doan Thi Thanh Nhan

Depth Distribution Of Long‒Lived Radionuclides in Soil Profile
After Fukushima Dai‒Ichi Nuclear Power Plant Accident

5Bekelesi Chisale
Wiseman

A Survey of Dose Rate Assessment at Fukushima Prefecture

6

Le Nguyen Tra Mi

Hypermucoviscous Klebsiella Pneumoniae and Drug Resistance7

Seima Tanaka

8

Takahiro Inagawa

9Mari Ishimori

The Research about the Attitude of the Others to the Evacueesof Fukushima Power Plant Accident

10

Triyono Basuki

Activity Concentration and Vertical Distribution of 134Cs and 137Cs in Shallow
Water Sediment, River Mouth Sediment and Soil of Surrounding Area of Hibara
Lake, in Fukushima: an Investigation of Radiocesium Indirect Deposition into Lake

11

Tatsuhiko Suzuki

Performance Evaluation of TLD Sheet in the Build-up Region

12

Russell Sarwar Kabir

Resilient Relaxation: Assisting Communities to Counter the Stress Response
Through the Practice of Self-regulatory Meditative Movement

13

Yuji Hirano

Atomic-bombed Special Students from Southeast Asia and Postwar JapaneseSociety

14

Chika Matsumoto

14:4515:30

Effects of Radiation on Skeletal Development
Basic Research on Severe Infections is Considered Necessary for Treatmentof High-Dose Radiation Exposure Patients

Public Attitude for Evacuation with Pets under Emergency Disaster Circumstances
Break Time 15:30-15:35

Time No

Name

Presentation Title

15

Nguyen Quang Tam

Mesenchymal Stem Cell Therapy for Radiation Induced Lesions (Long Term
Internship Topic Review)

16

Silvia Natsuko Akutsu

Insufficiency of BUB1B Gene Increases Structure - Chromosomal Instability Post
Ionizing Radiation

17

Chuon Channarena

Establishment of School-based Health Check-up Systems for Radiation Disaster
Preparedness in the Kingdom of Cambodia

18

Do Xuan Bien

Pulling and Pushing Factors of Migration in Fukushima Nuclear Affected Areas Case Study of Minamisoma City

19

Fumie Yamaguchi

Longitudinal Research on Effects of Trust and Perceived Procedural Fairness on
Accepting the Restarting of Nuclear Power Plants

20

Thanh Tat Nguyen

Method for Determining the Depth Profile of Radioactive Cesium in 30 cm Soil
Core by IP-Based Unfolding Method

21

Nguyen Thanh Hai

Bond Selectivity Study of CsTolenA, B, C, D, and E to Cs+ by using Density
Functional Theory

15:35Sharifah Nabihah Syed Spatial Analysis of Radiocesium Concentrations in a Bryophyte (Hyophila
22
16:20
Othmanpropagulifera , Musci) within 50km from Fukushima Daiichi Nuclear Power Plant
23

Yen Hwa Lin

Knowledge Based Planning Model using Prioritized Optimization Dataset24

Ho Minh Van

Detection of ATP-Dependent Inflammasome Suppression on Innate Immune
Responses in Sepsis

25

Ekaterina Royba

Genome Editing Technique as a Useful Tool for Analysing Individual Differences ofRadiosensitivity

26

Yasushi Nabae

Migration Pathway of Radioactive Materials from the Japan Sea to the Okhotsk
Sea

27

Wim Ikbal Nursal

The Importance of Public Participation to Intermediate the Lack of Radiation
Information after Fukushima Dai-ichi Nuclear Power Plant Accident

28

Yurika Oba

29

Uranchimeg Tsegmed

The Spatial Pattern of Cs-137 Contamination of Evergreen Conifer Trees, JapaneseFir
An Investigation of the Best Setting of Collimator Angle in AutomaticallyGenerated Volumetric Modulated Arc Therapy of Head and Neck Cancer
Break Time 16:20-16:30
Poster Presentation 16:30-18:20

No.Catalytic Impacts of Long-term Evacuation upon Post-disaster Chronic
Health of Elderly Generation in Fukushima:
Findings from the 14th Fukushima Short Field Visit
Chowdhury Abu Sayeed
Graduate School of Biomedical & Health Sciences, Hiroshima University
Keywords: Long-term evacuation impacts, post-disaster chronic health, healthcare for elderly.
Longer lasting impacts of nuclear disasters have been impacting society and environment ever since the era ofnuclear power harnessing. The Fukushima triple disaster has exhibited the unique impacts of radiation disaster with lesser
effects related to radiation exposure than longer lasting psychological stress which is ultimately hindering overall
revitalization procedures. Ongoing robust health management survey with the aim to “monitor and promote the long term
health issues of Fukushima residents”, actually has less emphasize upon post-disaster chronic health, specially the elderly
residents who currently constitutes a substantial portion (32.10%) of the population. These elderly residents are getting
less focus in terms of intensive healthcare targeting the rapidly changed population dynamics. Among the four detailed
surveys conducted by Fukushima Medical University, almost all the focus is upon early detection and preventive
treatment of external radiation exposure related critical diseases. Meanwhile, the vulnerable old-age group is yet to be
seen being provided with prioritized integrated health care facilities. Due to the inverse correlation among low birth rate,
low mortality rate and higher life expectancy, Japan is already in dilemma with its highest rate of elderly population in
the world. In Fukushima the scenario is more critical due to long-term evacuation which has spurred up the rapidity inpopulation aging higher than the county statistics. Consequently, adequate health support towards senile diseases, trend of
population statistics, procurement of physically capable workforce, individual burden of life, health insurance, quality ofday to day life and living expenditures and decision to close temporary housing facility in March 2017 may lead to acomplex situation to handle smoothly. I have desire to study and contribute to this issue of reconsidering estimation forproviding adequate integrated health care for elderly people through the mediator efforts in affected communities.

IV㸫No. 2
A Social Cognitive Perspective of Radiation Risk Perception and Risk
Information Seeking Behavior of People in the Context of Fukushima
Disaster: Towards Better Public Oriented Risk Communication
Tsegmed Otgonchimeg1,2, Atsunori Ariga1,2
1.

Radioactivity Social Recovery Course, Phoenix Leader Education Program2.

Graduate School of Integrated Arts and Sciences, Hiroshima University

Keywords: radiation risk perception, risk information seeking behavior of people, risk communication, disaster- related
cognitive science

Background
Fukushima disaster highlighted human cognition. For example, people had to make decisions on how
to behave based on limited information that may or may not be true. Such processes consisted ofthree psychological components; risk perception, risk communication and decision making process.
1. Risk perception-how an individual perceived and selected information
2. Risk communication- how an individual shared information with others
3. Decision making process-how an individual or a group made decisions
PurposeIt is to determine how the people engage in decision making related to the levels of risk involved
during radiation leakage and the risk information seeking behaviors of people in the context ofFukushima disaster. Thus, it is important to understand human cognitive mechanisms underlying
risk perception, risk communication and decision making process, by taking a lesson from the
Fukushima disaster. There is a particularly urgent need to develop our knowledge in preparation fora future radiological disaster.
Materials and Methods
We will use the social –cognitive theory to empirically examine how we engage in decision making
related to the levels of risk involved during radiation leakage and the risk information seeking
behavior of people in the context of Fukushima disaster. To achieve this, we will first examine theinformation seeking behavior of people during the time of Fukushima disaster in social survey (social
psychology approach). Second, based on this knowledge, we will specify social and cognitive factorsthat affect our risk perception, risk communication, and decision making in various psychologicalexperiments (cognitive psychology approach). Finally, we will construct the model of humancognition under the risk, and then provide recommendations and suggestions based on it.

IV㸫2

No. 
Microbial Precipitation of Cesium and Other Nuclides by Cultures ofManganese Oxidizing Bacteria
Linh Thi Thuy CAO1,2, Moeto TAKADA2, Akiyoshi OHASHI3,
Takeshi NAGANUMA1,2
1) Radioactivity Environmental Protection Course, Phoenix Leader Education Program for Renaissance of Radiation
Disaster, Hiroshima University2) Department of Environmental Dynamics and Managements, Graduate School of Biosphere Science, Hiroshima
University3) Department of Civil and Environmental Engineering, Graduate School of Engineering, Hiroshima University
Keywords: Manganese oxidizing bacteria, biomineralization, cesium immobilization, radio-ecology, integron/gene
cassette system
High concentrations of cesium (Cs) in soil and sediments in Fukushima prefecture due to 2011

Great East Japan

Disaster were well reported. According to previous studies, absorption of radioactive Cs to soil and sediment particles is
so stable that they are hardly mobilized to move toward down stream or diffuse to ground water. Bacterial activities on
absorption and transformation of Cs were suggested that may play some role in the surface behavior of Cs.
Biomineralization processes carried by manganese (Mn) oxidizing bacteria (MOB) are well-known that associated with
the immobilization of a wide range of metal elements. Some Mn(II) uptake bacteria also possess radiation resistantcharacteristic. The possibility that MOB play a role in the precipitation of Cs and other nuclides will be investigated bycultures of isolated MOB from wastewater treatment system designated for minor metals removal and recovery, addedwith Cs and other nuclides. The mechanism by which MOB uptake Mn(II) and elements will also be investigated bymolecular analyses of newly isolated bacteria from Fukushima fields. Mobile DNA of these bacteria (integron/mobile
gene cassette system) which may contain the information about the genes that have been adapted with high concentrationof metal elements and/or high radiation dose will be discovered by culture-independent techniques . Lateral gene transferof the genes that encode novel proteins and enzymes with adaptive characteristic or metabolic functions will befacilitated by the presence of integron/gene cassette systems. The study findings are expected to have important
implications for the bioremediation of Cs and other nuclides contaminations.

IV㸫No. 
'HSWK'LVWULEXWLRQ2I/RQJ௅/LYHGRadionuclides In Soil Profile$IWHU)XNXVKLPD'DL௅,FKL1XFOHDU3RZHU3ODQW$FFLGHQW
Doan Thi Thanh Nhan
Radioactivity Environmental Protection Course Phoenix Leader Education Program
Hiroshima University

Keywords: Radiostrontium, Radiocesium, Plutonium, Depth profiles, Migration of radionuclides

Nevertheless, almost five years after the Fukushima Daiichi nuclear power plant accident, it is important tocontinuously monitor the radionuclides after the Fukushima nuclear accident to provide obvious radiologicalconsiderations and basic data for decontamination campaigns as well as revitalizing and reconstructing Fukushima.
The Japan topography, as well as the difference of precipitation and kind of soil between different fields, led todifferent deposition pattern for each radionuclide. Detailed maps which provide a picture of nuclides spatial
distribution, as well as the migration and diffuseness of them, are necessary for human safety.
In this study, we aim for the following goals. First, I am going to analyze and determine vertical distribution in soilof three anthropogenic radionuclides 89Sr/90Sr, 131I/134Cs/137Cs and 239,240Pu which are the most radiologicallyimportant and typical of beta, beta/gamma and alpha emitters, respectively. We intend to improve further theachievements of previous research to fully investigate vertical distribution of not only radiocesium and radioiodine
but also radiostrontium and plutonium and their decay products in different soil profiles. Depth profiles oflong-lived radionuclides will be characterized from the reactions of the radionuclides with each soil components
along the depth. These knowledge is essential to understand their fate in the terrestrial environment. Information on
vertical migration is obviously useful for present and future decontamination strategies and for modeling the
migration of radionuclides into groundwater.
Secondly, we aim to simulate the radionuclide dispersion and deposition in soil using radionuclide dispersion modeland compare it with experimental data to validate the model. After validating, simulation will be used to further
investigate data that hardly achieved by experiments.
Last but not least, the cleanup of Japan’s radioactive water and land is expected to take decades and will require avariety of corrective methods. We want to propose an effective method which not only cheaper than present method
but also less disruptive to the local environment and be able to maintain the landscape.

IV㸫No. 5A survey of Dose rate assessment at Fukushima Prefecture
BEKELESI Chisale Wiseman1,2, NAKASHIMA Satoru1,2,3
1.Rad. Environment Protection Course, Phoenix Leader Education Program
2.Department of Chem., Graduate School of Science, Hiroshima University
3.Natural Science Center for Basic Research and Devp., Hiroshima University
Keywords: Gamma Spectrometry system, Survey meter, absorbed dose, Cs-137, Fukushima
In the 14th short field visit to Fukushima Prefecture on 5th Nov 2016 absorbed dose rates (ADRs) in air were
determined by means of both hand-held survey meters and car borne survey method (CBSM) using Gamma
Spectrometry system with Sodium Iodide Thallium (NaITl) detector. The purpose was to assess to what extent
remediation had been done in Fukushima and to set boundaries for future research in suspected areas. The results foundshow that the lowest dose rate was detected around Soma Thermal Power Plant (G) along the coast, Minami-soma
Hospital (I) and Iwaki zones 2 ZLWKUHDGLQJVRIDQGȝ6YKUHVSHFWLYHO\ZKLOHWKHKLJKHVWZDV
recorded near Fukushima Daiichi Nuclear Power Plant (FDNPP-M) area which ranged from 1.16 - ȝ6YK ZLWK D
PHDQYDOXHRIȝ6YK7KHDYHUDJHEDFNJURXQGGose rate for the whole study segment excluding FDNPP-M
SUHPLVHVZDVȝ6YK+RZHYHUWKHUHLVVWLOOQHHGWRPHDVXUHVRLOZDWHUDQGSODQWVDPSOHVIRUOHYHOVRI5D-226,
Th-232 and K-40 in addition to Cs-137, Cs-134 in order to assess radionuclides` health hazards and risks to people andtheir migration in the environment. The tentative results agree with other studies which show that most parts ofFukushima Prefecture have been decontaminated while the areas close to the nuclear power plant and few others stillcontain high levels of radioactivity.
Methods
Data on ADRs in air was obtained 1 meter above the ground by using hand held survey meters, the NaI(Tl) detector
mounted in a moving vehicle respectively. Over 20,000 measurements were made by CBSM (Fig 2) from Fukushima
Station to FDNPP and back covering about 200km.
Preliminary results

Fig 1: ADRs by Survey meterFig 2: Over 20,000 ADRs measured by CBSM

Future Research
The results show that most areas have been decontaminated. However, there is still need to monitor K-40, Ra-226 andTh-232 in soil, water and plants in selected areas in addition to Cs-137, Cs-134 in order to study radionuclides`
concentration, migration and their health hazard and risks on people.

IV㸫5

No. 
Hypermucoviscous KlebsiellaPpneumoniae and Drug Resistance
Le Nguyen Tra Mi, Shizuo Kayama, Motoyuki Sugai
Department of Bacteriology, Graduate School of Biomedical and
Health Science, Project Research Center for Nosocomial Infectious diseases
Keywords: Klebsiella pneumoniae, hypermucoviscosity, rmpA, ESBL, carbapenemase
Klebsiella pneumoniae is a common Gram-negative bacterium causing opportunistic infection mostly inimmunodeficient hosts. It can be acquired through community or hospital pathway, leading to many serious diseases suchas pneumonia, primary pyogenic liver abscess or distinctive invasive syndrome.
Variety of virulence factors of K. pneumoniae have been known including capsular polysaccharide, LPS O-antigen,several pili or fimbrial adherence factors, enterobactin, aerobactin siderophores, and mucosity. The hypermucoviscosity(HV) phenotype relates to a muco-polysaccharide network outside the capsule which assists these bacteria to colonize themucosa and protects them from anti-capsule-specific antibodies to escape phagocytosis. The HV-phenotype of somespecific strains were reported to be responsible for the increasing virulence of K. pneumoniae. Some studies in diabetic
mice had indicated that HV-phenotype of K. pneumoniae isolates was one of the main virulence factors causing
bacteremia and might also involving in systemic spread of bacteria. The HV-phenotype was suggested to be enhanced by
the expression of 2 capsular polysaccharide genes: rmpA (regulator of the mucoid phenotype A) and rmpA2(transcriptional activator). However, relation between rmpA genes and HV-phenotype is not yet clear since some of
HV-positive isolates do not possess these genes or a minor proportion of HV-negative isolates carry rmpA and/or rmpA2.
Recently

weareobserving

rapidEnterobacteriaceae in nosocomial setting.

increaseofextended-spectrum

ß-lactamase(ESBL)-producing

Moreover, in West Japan, we started to observe emergence of

carbapenemases producing K. pneumoniae. This strain carries ESBL, CTX-M-2 and carbapenemases, IMP-6, and isvirtually resistant to all ß-lactam antibiotics. Among the isolates, we found several strains with HV-phenotype.
Interestingly, these strains are negative for rmpA genes.
In this study, we plan to retrospectively review molecular mechanism of K. pneumoniae hypermucoviscosity andtry to present initial study on the correlation between the expression of the HV-phenotype and virulence genes in K.
pneumoniae isolates in our research center, as well as the relationship between the HV-phenotype and
ESBL/carbapenemase-production.

IV㸫No. 

Effects of Radiation on Skeletal Development
Seima Tanaka1 and Chisa Shukunami2
1

Department of Molecular Biology and Biochemistry, Biomedical Science Major,

Graduate School of Biomedical and Health Sciences, Hiroshima University
2

Department of Molecular Biology and Biochemistry, Basic Life Sciences, Institute of Biomedical and Health Sciences,

Hiroshima University
Keywords: Irradiation, Chondrogenesis, Chondrocytes, ATDC5, Microarray
Massive amounts of radioactive materials were accidentally released at the Fukushima Daiichi on March 11,
2011. Since then, local residents in the affected areas have been forced in to live in fear and anxiety. Indeed, radiation
could increase the risk of cancer or other mental and physical health problems. Among local residents, pregnant womenand infants are a group of who need special consideration when exposed to radiation. Radiation could elevate the risk ofabnormal bone formation in fetuses and children, but so far our knowledge on hazardous effects of radiation on skeletal
development is limited. During embryonic development, most of the bones in the body are formed through the process
called endochondral ossification in which cartilaginous bone primordium initially acts as a template for the future bone
and is eventually replaced by bone and bone marrow after invasion of blood vessels into the primordium (1). After birth,
growth plate cartilage at the epiphysis contributes to the longitudinal growth of bone, thus allowing the long bones togrow until the end of the puberty. In the growth plate, proliferating chondrocytes become hypertrophic to mineralize theirsurrounding extracellular matrices prior to vascular invasion. Radiation-induced arrest of bone growth during radiation
therapy in childhood is considered to be caused by the impaired growth and maturation of chondrocytes at the growthplate. However, the molecular mechanisms that regulate the disorders of growth plate cartilage by radiation remain
uncertain. In this study, effects of radiation on skeletal formation will be investigated by taking advantage of thechondrogenic cell line ATDC5 which can simulate a multistep differentiation process of chondrocytes contributing to
endochondral bone formation in vitro (2, 3), . To reveal effects of irradiation on chondrogenic differentiation of ATDC5
cells at a molecular level, gene expression profiling will be analyzed by DNA microarrays.
References
1.

Kronenberg,, Nature; 423:332-336, 2003

2.

Shukunami et al., J Cell Biol.; 133: 457-468, 1996

3.

Shukunami et al., J Bone Min. Res.; 12: 1174-1188, 1997

IV㸫No. 
Basic Research on Severe Infections is Considered Necessary for Treatmentof High-Dose Radiation Exposure Patients

Takahiro Inagawa
Radiation Disaster Medicine Course
Keywords: Acute radiation syndrome, immunocompromised, infection, emergency radiation medicine, Staphylococcus
aureusAcute radiation syndrome (ARS) can be said to be the most severe pathological condition in emergency
radiation medical care. Patients exposed to high doses become ARS and serious condition due to multiple pathologies
such as myelosuppression, gastrointestinal mucosal disorders, skin disorders. Because of myelosuppression, patients are
fallen into an immunocompromised state, furthermore they become collapse of the defense mechanism by causing skinand mucosal damage, then bacterial invasion easily occurs in them.
In this way, patients who are in an immunocompromised state may have any kind of infections, and once it
occurs, it become critically illness. Thus, treatment of patients with high-dose radiation exposure is a battle against
serious infections.
Treatment of ARS requires highly intensive care, and it is considered that there are few hospitals that can behandled throughout the country.
We so far have been treating severe infections in patients with various immunosuppressed conditions at theAdvanced Emergency and Critical Care Center, ICU in Hiroshima University Hospital. Furthermore, regarding radiation
medicine, we have experience as A-Bomb exposure site, many research institutes, and have had a lot of knowledge andtraining on emergency radiation medicine. We consider that Hiroshima University Hospital is one of few hospital in theworld in which we can treat patients in ARS.
Basic research on severe infections is considered necessary for treatment of coming high-dose radiation
exposure patients. I haven’t decided the concrete methods of my study yet, but as the Bacteriology laboratory in our
university is good at studies for especially Staphylococcus aureus, I consider that I will applied Focus to Staphylococcus
aureus, and its pathogenicity, severity factors, treatment resistance factors.

IV㸫No. The Research about the Attitude of the Others to the Evacueesof Fukushima Power Plant Accident
Mari Ishimori, Kiriko Sakata
Graduate School of Integrated Arts and Sciences, Hiroshima University
Keywords: Attitude, evacuee, conflict, human relationships, Fukushima
The Fukushima atomic power plant accident that happened in 2011 devastated the public who lived in East Japan. One
characteristic of this devastation is that the atomic power plant accident produced many evacuees. According to a
Reconstruction Agency announcement, on December 26, 2016, there were at least 83,000 evacuees merely in the
Fukushima prefecture. Among the evacuees, some were forced to move, and some moved voluntarily. Nobody knows thecorrect numbers of the voluntarily evacuated. The evacuees went all over Japan. Some of them moved into Fukushima
prefecture, and some moved to the Tohoku area, Kanto area, West Japan, and Hokkaido (Takahashi, 2014). Some of theevacuees want to stay in their new home. Some have not decided where they would like to stay—and the ratio ofevacuees who have not yet decided increases year after year (Takahashi, 2014). According to many researchers, evacuees
encounter economic difficulties in adapting themselves to their new place; among such difficulties, how to support theevacuees is discussed (Yamane, 2013). One reason for the difficulties of evacuees adapting themselves and their anxiety
is conflict in relationships with pre-existing residents and the children being bullied in their new home. Moreover,original residents criticize the evacuees because they left Fukushima when the crisis was at its height, yet refuse to allow
evacuees to return to Fukushima, their original home, according to the evacuee group “Asuchika”. Similarly, evacuees
meet difficulties not only at their new residence but also their original one, especially regarding human relationships.
However, there is almost no research concerning evacuees’ relationship challenges. Accordingly, I will research in thisfield the breakdown of the evacuees’ human relationships, including the attitudes of the new and old locations’ residents
toward the evacuees. This research is expected to obtain knowledge to resolve the conflicts underlying the evacuees’
relationships and the social rejection the evacuees have experienced.
To investigate this topic, I will administer an online survey to the 500 residents of the contaminated area (Fukushima,
Miyagi, Iwate, Ibaraki, Tochigi, Gunma, Saitama, and Chiba).
First, I will gather information about the respondent’s attributes, including sex, age, educational background, occupation,
income, the experience of evacuating, and conflicts in the family related to the evacuation.
Subsequently, I will ask the respondents to work with my original psychological scale, which inquiries about attitudes
toward the evacuees.
Last, from a preceding study (e.g., Kikuchi & Takagi, 2015), I will conclude the recognition of the degree of radioactive
contamination of the residence, trust in the administration, knowledge about the radiation, manner of critical thought.

IV㸫No. 0
Activity Concentration and Vertical Distribution of 134Cs and 137Cs in Shallow
Water Sediment, River Mouth Sediment and Soil of Surrounding Area of Hibara
Lake, in Fukushima: an Investigation of Radiocesium Indirect Deposition into Lake
Triyono Basuki1,2, Sunao Miyashita2, Masaya Tsujimoto1,2 and Satoru Nakashima1,2,3
1Radioactivity Environment Protection Course, Phoenix Leader Education Program2

Department of Chemistry, Graduate School of Science, Hiroshima University

3

Natural Science Center for Basic Research and Development, Hiroshima University

Keywords: Radiocesium, Vertical Distribution, Indirect Deposition
Introduction
Lake is one of main environment for long term assessment of radioactivity after nuclear disaster. It is due to its
important role as accumulation area in radionuclide migration pathway from upstream and surrounding areas. Besidethrough direct deposition of radiocesium from atmosphere, the radiocesium is also deposited to the lake through indirect
deposition from upstream through river and from surrounding area. We investigated the radioactivity of radiocesium on
the sediments of Hibara lake and surrounding area in order to identify the indirect deposition process of radiocesium intolake.
Experiment
Soil and sediment samples were collected from flood plain (2 sampling points), shallow water of lake (7sampling points) and river mouth of 2 rivers (2 sampling points each) by using the hand core sampler. The samples weresliced each 5 cm and measured using Ge semiconductor detector in wet weight. Samples were dried by oven at 105Cºand sieved using 2 mm and 75 μm sieves in order to characterize the particle size composition of samples.
Results and Discussion
Base on the radiocesium activity concentration and particle size composition data, we found that there was anenough clear relation between activity concentration of radiocesium in shallow water sediment and soil of surroundingarea as well as sediment of river mouth. The high activity concentration of radiocesium in shallow water sediment was
found in area near river mouth (inlet) and near high slope surrounding area. This results suggested that the accumulated
radiocesium in shallow water sediment of lake could be from upstream area through river and from surrounding area
through water runoff. Furthermore, the total activity concentration in shallow water sediment based on the vertical
distribution data has potential to be used for indirect deposition rate calculation of radiocesium into lake for long term
assessment.

IV㸫0

No. 1
Performance Evaluation of TLD Sheet in the Build-up Region
Tatsuhiko Suzuki
Department of Radiation Oncology
Graduate school of Biomedical & Health Sciences, Hiroshima University.
Keywords: Dose assessment, Accuracy, Skin, TLD sheet

Purpose: The accuracy of dose measurements using the ionization chamber and dose calculations of RTPS haslarge uncertainty in build-up region. This study, I evaluated the basic performance of new developed TLD sheet, andcompared the measurement accuracy of the built-up area and Monte Carlo to verify the measurement accuracy.
Methods: I evaluated property of TLD sheet as flatness of the two-dimensional, the dose response, dose
resolution, high-energy dependence and the beam quality dependence, that were measured using Varian TrueBeam. The
measurement accuracy of the built-up region compared with the monte carlo calculation.
Results: Flatness of the two-dimensional is 6% in the radiation field of 10x10cm2, dose resolution was 11mGy.
There was also the linearity of the dose response to 50Gy that was measured in this study. High energy dependent oftherapeutic 4, 6, 10MV were within the error range, however, there has a systematic difference. And also, low energy
dependence was measured using the dose conversion table of the high-energy in fluoroscope 100kV has a large
uncertainty, nevertheless at low doses tended linear dose response. In the measurement of the build-up region 0 cm wasgood agreement with monte carlo calculation, on the other hands, in the 0.5-1.5 cm has occurred 0.8% systematicdifference.
Conclusion: I confirmed a broad range of dose linearity is characteristic of TLD and low energy dependence.
The property of TLD sheet was fulfilled required performance in the build-up region of the non-electron equilibrium.
However, systematic difference was occurred for heated reading measurements. So, systematic difference in the readingof the TLD sheet is required improvement as uncertainty reduction of reading.

IV㸫1No. 1
Resilient Relaxation: Assisting Communities to Counter the Stress Response
Through the Practice of Self-regulatory Meditative Movement
Russell Sarwar Kabir, Yutaka Haramaki
Graduate School of Education, Department of Psychology
Keywords: Self-regulation, resilience, community salon intervention, dosahou, Self-Active Relaxation Therapy
Self-regulation skills are crucial for managing various kinds of threats to the human experience (Southwick et al., 2014).
Our sense of agency and mastery over our own health is a powerful protective factor, and thus a boon to our
psychological resilience. The common physical manifestations of stress, known as the stress response, have been shown
to be reduced by activating the relaxation response system that is driven by the hypothalamic-pituitary-adrenal axis toresult in decreased sympathetic nervous system activity, decreased heart rate, lower metabolism, and decreased
respiratory rate (Stahl et al., 2015). Chronic technological disasters proliferate psychosocial stress, and there is evidence
to suggest that psychological distress will become chronic in Fukushima (Couch & Coles, 2011; Bromet, 2014).
Bodymind approaches to relaxation may be useful and appropriate to reduce stress and maintain psychological resilience
resources in the Fukushima recovery context. This presentation summarizes this intersection between the Japaneseoriginal psychotherapy known as dosahou and health psychology, my experiences as a facilitator of it through a salon
activity in Iwate, Japan, and the potential application of relaxation programs as self-regulatory tools in the prolonged
reconstruction from radiation disaster.

IV㸫1No. 1
Atomic-bombed Special Students from Southeast Asia andPostwar Japanese Society
Yuji Hirano
Graduate School of Letters, Hiroshima University
Keywords: foreign atomic-bomb victims, Special Students from Southeast Asia, Japanese Society, memory
From the viewpoint of the fact that Special Students from Southeast Asia (NANTOKU Students) werevictimized as a minority group of A-bombed foreign victims, I would like to study the process of recalling andmemorizing them in the postwar Japanese society. Although few, less than ten, had victimized by A-bomb, this fact has
been kept alive and passed on in Japanese society. In this research, I would like to clarify the process of recalling
A-bombed NANTOKU students as a minority in Japanese society, focusing on the period from the mid-1950s to themid-1970s.
1. Process of Recall by Hiroshima University
In 1952, an elder brother of the late Mr. Syed Omar, an A-bombed NANTOKU student, sent a letter to thepresident of Hiroshima University to ask for his death certificate. Hiroshima University began to investigate this matterby interviewing with persons concerned such as University staff members, students, citizens of Hiroshima at that time. As
a result of the analysis, this investigation became an official record and memory of Hiroshima University throughresponse to his brother’s request.
I have also concluded that such response of Hiroshima Univ. might have been based on not only the intensionof revealing actual situation of A-bombed students but also the social intention of internationalizing the ban-the-bomb
movement at that time.
The results of this investigation was succeeded as an important record in editing the “Seisi-no-hi: Hiroshima
Univ. Record of A-Bomb Disaster” in 1975.
2. Construction of Gravestones and Relatives Visit to Japan (Process of Consolation and Reconciliation)
Asian Students Cultural Association (ABK) invited the relatives of the two A-bombed NANTOKU students toJapan to pray their gravestones in Hiroshima and Kyoto in 1964. ABK closely communicated with Kozenji and Enkoji
for this visit. It triggered the construction of Nik Yusof’s gravestone. Also, Malaysia Embassy in Tokyo had involvementin this visit.
Thus, a series of these events has two aspects; (1) consolation of A-bombed students and reconciliation withrelatives and (2) the viewpoint of bilateral relationship between Japan and Malaysia.

IV㸫1

No. 1
Public Attitude for Evacuation with Pets under Emergency Disaster Circumstances
Chika Matsumoto1, Kiriko Sakata1, Hitomi Sugiura2
1

Graduate School of Integrated Arts and Sciences, Hiroshima University

2

College of Sport and Health Science, Ritsumeikan University

Keywords: pets, evacuation with pets, pet owners, non-owners
The Fukushima Daiichi Nuclear Disaster following Great East Japan Earthquake occurred in 2011. Not only
humans, but also many animals suffered from the disaster. In Fukushima Prefecture, the exclusion zone was set for thearea around the Fukushima nuclear power plant accident. Because of its urgency, the residents of the area had toevacuate quickly and their pets were left behind, released outdoors, left tied up, and so on. After this disaster, theMinistry of the Environment recommended to their booklet “Guidelines for aiding pets during a disaster” that people
should evacuate with their pets during disasters. It is important for not only animal protection, but also supporting
victims’ mental health.
This study was designed to identify psychological variables of the general public that could facilitate or inhibit
the evacuation with pets and living with pets in shelters or temporary housing during emergencies. An Internet-based
survey was conducted in 2015 focusing on differences in attitudes between pet owners and non-owners (N = 600).
Multivariate regression analysis was conducted with “Co-evacuation with pets” and “Willing to accept others’ pets during
evacuation and in shelters” as objective variables. Results indicated that pet owners’ “Worrying about around the otherpeople” did not significantly inhibit co-evacuation. Moreover, approval of pets among pet owners aware of Ministry of
the Environment recommendations was significantly higher than among unaware pet owners. Furthermore, “Worrying
about around the other people” by people without pets had a significantly negative effect on each objective variable.
Also, “Treating pets as equal to humans”, or having an “Equal status” had a significantly positive effect on the objective
variables. These results suggest that the treatment of pets as equals by pet owners might be one factor facilitating
positive attitudes in people without pets about co-evacuation with pets and having others’ pets during evacuations and in
shelters.

IV㸫1

No. 15
Mesenchymal Stem Cell Therapy for Radiation Induced Lesions(Long Term Internship Topic Review)
T. Nguyen Quang (1), O. Belyakov (2)1

Dept. of Molecular Oral Medicine & Maxillofacial Surgery, Hiroshima University

2

Applied Radiation Bi

Keywords: mesenchymal stem cell, autologous bone graft, cutaneous radiation syndrome, radiation burnAcute radiation syndrome (ARS) or cutaneous radiation syndrome is caused by accidental overexposure toradiation or in a radiation disaster are affected by radiation are skin, bone marrow, and other target organs. Those lesions
are complex and difficult to heal, due to several and long-term effects of radiation and sterilization of local stem cells.
Currently, many wound treatment protocols are being developed to improve the healing process after radiation damage torestore the barrier function and esthetical outcome of the skin. Mesenchymal stem cells (MSCs) therapy has beendeveloped for nearly ten years to treat skin burns from localized exposure to ionizing radiation using mouse and pig
models. Although the use of this therapy is limited, and patients should undergo surgery, this is a promising therapy fortreating radiation induced lesions.

IV㸫15

No. 1
Insufficiency of BUB1B Gene Increases Structure - Chromosomal Instability
Post Ionizing Radiation
Silvia Natsuko Akutsu, Ekaterina Royba, Kosuke Hosoba, Tatsuo Miyamoto,
Shinya Matsuura
Department of Genetics and Cell Biology, Research Institute for Radiation Biology and Medicine,
Hiroshima University
Keywords: PCS (MVA) syndrome, chromosome instability, ionizing radiation, BubR1 protein
The germline mutations of BUB1B gene encoding BubR1 protein, a central player of mitotic spindle assembly
checkpoint, cause Premature Chromatid Separation (PCS) [Mosaic Variegated Aneuploidy (MVA)] Syndrome. Thesepatients show predisposition to develop childhood cancer (Wilms tumor or rhabdomyosarcoma), due to numericalchromosomal instability (N-CIN). However, it`s unknown whether PCS (MVA) syndrome is related with structure
chromosomal instability (S-CIN) post ionizing radiation (IR).
In this study, we tried to evaluate the S-CIN post IR in PCS (MVA) syndrome using cytogenetic study andcytokinesis block micronucleus (CBMN) assay. We irradiated the fibroblasts from two patients (CB1SK and CB4SK) andtwo normal individuals (GM03941 and GM22277) with different high dose rates (0Gy, 1Gy and 2Gy) ofgamma-radiation using Cs-137 (Gammacell 40 Exactor, 1Gy/min) and evaluate the structure chromosome instability(S-CIN) post IR. We counted dicentric, ring and acentric chromosome fragments in 100 metaphases of the irradiated cells
using PNA-FISH assay. The PCS (MVA) syndrome patient cells showed S-CIN post IR more than normal control cells ina dose-dependent manner.
To consolidate the S-CIN post IR, we performed cytokinesis block micronucleus (CBMN) assay. We foundthat PCS (MVA) syndrome patients had higher percentage of micronuclei post IR in comparison with normal individuals
in a dose-depended manner. These results suggest that PCS (MVA) syndrome is a unique type of radio-sensitivity diseasecharacterized with S-CIN post IR.
To clarify the biochemical and cell biology role of BubR1 protein under ionizing radiation exposure, Iestablished BUB1B gene knockout (KO) cell lines using genomic editing technology, Clustered Regularly Interspaced
Short Palindromic Repeats/Cas protein 9 (CRISPR/Cas9) system. Currently, I attempt to perform a time-lapse imaging ofdicentric and ring chromosome formation in BubR1-KO cell lines labeled with GFP-H2A (DNA) and CENP-A mRuby2(centromere) fluorescent proteins.

IV㸫1No. 1
Establishment of School-based Health Check-up Systems for Radiation Disaster
Preparedness in the Kingdom of Cambodia
Chuon Channarena1, 3, Svay Somana2, Junko Tanaka1
1Department of Epidemiology, Infectious Disease Control and Prevention,
Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
2Ministry of Health, Phnom Penh, Cambodia
3Phoenix Leader Education Program, Hiroshima University, Hiroshima, Japan
Keywords: Health promotion; health checkups; schoolchildren; Cambodia; radiation disaster preparedness
Background: The Cambodian demand for energy is on the increase due to the increasing electricity use to develop thecountry and the growing standards of living of the Cambodian. The government of Cambodia is progressing with the plan
to construct nuclear power plants as the demand for energy supply continues to rise, while, concerns are being raised
regarding past nuclear power plant accidents including the Three Mile Island (US), Chernobyl (Former Soviet Union)
and lastly Fukushima Daiichi Power Plant (Japan). Radiation disaster preparedness can be improved by having baseline
data before the occurrence of the disaster. To date, health promotion as a national policy lacks capacity in the Cambodian
educational sector. Moreover, data of health problems in the schools is scarce as compared with data from public
hospitals. Aims: The purpose was to investigate the prevalence of health problems among schoolchildren in Siem Reap
Province as a baseline assessment to help the Ministry of Health of Cambodia design health screening systems forschoolchildren. The ultimate aim is to have necessary data that can be used as baseline data for disaster management.
Methods: It was a cross-sectional study where a total 162 schoolchildren (3rd and 4th grade) from Siem Reap Province
Teacher Training Elementary School were selected for this study. After obtaining written consents from parents/legal
guardians of each child, questionnaire about past medical history and current health problems of each child was answeredby parents/legal guardians at home. Children were examined at the school for health problems including lung and heartdiseases, Ear Nose Throat diseases, urinary infection and nutritional status in June 2016. Those suspected with disease
were advised to visit a local hospital.
Results: 135 (83.3%) study participants were completely examined among 137 schoolchildren. The age of schoolchildren
ranged from 8 to 15 years old (average age was 9.9 ± 1.1 years old) as of 2016. Prevalence of chronic otitis media was
7.4% and that of impacted cerumen was 14.1%. Anthropometric measurement showed that 7.4% of the schoolchildren
had severe thinness (BMI < -3SD), whereas 7.4% also were obese (BMI > +2SD).
Conclusion: Undiagnosed health problems were common among the schoolchildren. This cross-sectional study may be
important to prevent burden of diseases in Cambodian schoolchildren, as well as in their communities. This study canhelp in providing basic data of the schoolchildren to the Royal government of Cambodia. It would be important toestablish a health checkup system in Cambodia. In case of nuclear accident this health checkup may be help in therecovery phase.

IV㸫1No. 1
Pulling and Pushing Factors of Migration in Fukushima Nuclear Affected
Areas - Case Study of Minamisoma City
Do Xuan Bien
Department of Geography, Graduate School of Letters, Hiroshima University
Keywords: Fukushima nuclear disaster evacuation, disaster migration, push and pull factors,
disaster migration determinants.

The Fukushima nuclear accident has triggered a massive evacuation from its affected areas. Recent statistical
data reports that among 160,000 evacuees, nearly 90,000 people have not returned to their home yet. To understand thenuclear disaster induced dynamics, different approaches have been employed in various studies. Distance Decay Theories,
Social Capital, and Gravity Model are widely used in investigating the mechanism of different types of migration. One ofthe primary approaches that I use in examining the motives of migration due to Fukushima Nuclear Disaster is Push andPull Analysis. This theory is broadly employed to elucidate migration patterns by analyzing the attraction and barriers of
migration in both migration destinations and location of origin.
In this presentation, I would like to present the outcomes of my analysis of push and pull factors in Minamisoma
City, which was located in 3 different evacuation zones and has the largest number of evacuees among 12 municipalities
in the affected areas. This analysis bases primarily on the questionnaire survey on 286 evacuees, both returned and not
returned, from May to October 2016. Push factors are derived from the reasons of not returning (by not returned group),
and from the comparisons of the living conditions of Minamisoma City before the accident and at the present (byreturned group), and the comparisons of the living conditions between Minamisoma City and evacuation destinations.
The possible disparities referring to gender and ages will also be discussed.

IV㸫1

No. 1
Longitudinal Research on Effects of Trust and Perceived Procedural
Fairness on Accepting the Restarting of Nuclear Power Plants
Fumie Yamaguchi, Kiriko Sakata
Graduate School of Integrated Arts and Sciences, Hiroshima University

Keywords: nuclear power plant, procedural fairness, trust, Elaboration Likelihood Model

The Elaboration Likelihood Model (ELM), which is a general theory of attitude change, was used toinvestigate effects and changes in trust, perceived procedural fairness, and perceived benefits on situation dependentacceptance of restarting nuclear power plants (NPPs) in Japan. Two longitudinal internet surveys were conducted (N =91) before and after restarting NPP. Multiple regression analyses indicated that increased perceived procedural fairness
and perceived benefits influenced accepting the restarting of NPPs in people with a strong interest in restarting NPPs,
regardless of their original attitude towards NPPs, whereas only original attitudes about NPPs influenced acceptance inpeople with a weak interest in restarting NPPs. Moreover, a high degree of trust in NPP operators increased perceived
benefits of restarting in people with a strong interest in restarting NPPs. Our results suggest that both perceived
procedural fairness and trust in NPP operators are used as information in the central route of ELM.

IV㸫1

No. 0
Method for Determining the Depth Profile of Radioactive Cesiumin 30 cm Soil Core by IP-Based Unfolding Method
Thanh Tat Nguyen, Tsuyoshi Kajimoto, Kenichi Tanaka and Satoru Endo
Quantum Energy Applications, Graduate School of Engineering, Hiroshima University,
1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
Keywords: Depth profile by IP, IP-Based unfolding method

The Fukushima Daiichi Nuclear power plant accident in March 2011 led to large amount of radioactive
materials released into environment. In these radioactive materials, 134Cs and 137Cs have quite long half-live of 2.06 and30.2 years, respectively, therefore, it takes time to decay out. Depth profile of 134Cs and 137Cs is useful information forinvestigation of radioactive cesium movement in the soil. The depth profile of radioactive cesium is determined based on
the division of soil core into layers, and determination of radioactivity concentration in these layers by gamma
measurement. However, the resolution of the depth profile is bad, because it is difficult to divide the soil core to layer
with thickness lower than 1 cm. In this research, a method for increasing the resolution of the depth profile which isnamed IP-Based unfolding method is proposed.
The IP-Based unfolding method is to determine the true distribution of the radionuclides by the unfold analysisof an imaging plate (IP: Fujii film Co., Ltd, BAS-IP MS 2040) intensity profile of the soil core. To obtain the IP intensity
profile of the soil core, the soil core rolled with the IP is put in the lead chamber for one day. Then, a 2-dimesion image isread by the Image Analyzer Typhoon FLA 7000 (GE Healthcare Life Science Co.,). The IP intensity profile is obtainedby taking average intensity in each 0.1 mm x 150 mm of the 2-dimension image of the soil core. The unfolding analysis
is performed based on the IP intensity profile and response functions of 134, 137Cs and 40K. The response function is therelation between the distance from a source to the deposition position, and the total deposited energy of the ȕ-ray andȖ-ray emitted from this source on the sensitive layer of the IP. The response functions of 134, 137Cs and 40K are calculated
by PHITS version 2.82. The depth profile of soil core is achieved by scaling the obtained results by unfolding analysis
with the gamma measurement results.
To validate the applicability of the proposed method, the unfolding analysis are performed on the different
shapes of IP intensity profile of the samples which were collected at Iitate village in 2013, and 2015. The unfolded results
show the method is good application for the different shapes of the IP intensity profile. The calculated depth profiles
show good agreement with the gamma measurement results. In addition, the advantage of the IP-Based unfolding method
is the depth profiles of the soil cores are made clearer than those obtained by gamma measurement.

IV㸫0

No. 
Bond Selectivity Study of CsTolenA, B, C, D, and E to Cs+ by using
Density Functional Theory
Nguyen Thanh Hai1, 2), Sunao Miyashita2) and Satoru Nakashima1, 2, 3)
1Radioactivity Environmental Protection Course, Phoenix Leader Education Program,
Hiroshima University

2

Department of Chemistry, Graduated School of Science, Hiroshima University

3

Natural Science Center for Basic Research and Development, Hiroshima University

Keywords: cesium tolerance, bond selectivity, conductor-like screening model, density functional theory

Various materials such as zeolites have been proposed as Cs+capturing agents for the decontamination ofradioactive waste water.

Recently, it was reported that CsTolen A, which contains multiple nitrogen in formula, enables+

a plant to avoid Cs uptake and thus harmful accumulation (1).
+

It was also reported that CsTolen A has a larger affinity+

to Cs compared with K in the presence of water molecules.
radioactive cesium in rice after nuclear accident.

On the other hand, we have studied the uptake of

Therefore, in the present study, we tried to consider the bond+selectivity of CsTolenA to E with Cs by using the density functional theory (DFT).
DFT calculation revealed that CsTolenA, B, C, D, and E have a larger affinity to K+ compared with Cs+ in gas
phase.

This is due to larger electrostatic interaction between CsTolenA to E and K+.

In the next step we will build the

optimized model of CsTolen’s structures in aqueous solution and calculate binding energy of cesium and potassium with
CsTolens. The benchmark for conductor-like screening model (COSMO) calculation of CsTolens is unknown, therefore
we will refer to the selectivity of dibenzo-18-crown-6 for alkali metal cations in aqueous solution (2).

The results will beshown on the poster.
References:1)

Eri Adams, Vitaly Chaban, Himanshu Khandelia, Ryoung Shin, Selective chemical enhances cesium tolerance inplants through inhibition of cesium uptake, Sci. Rep. 5:8842 (2015).

2)

Chang Min Choi, Jiyoung Heo, Nam Joon Kim, Binding selectivity of dibenzo-18-crown-6 for alkali metal cations
in aqueous solution: A density functional theory study using a continuum solvation model, Chem. Cen. Jour.
10.1186/1752-153X-6-84 (2012).

IV㸫

No. 
Spatial Analysis of Radiocesium Concentrations in a Bryophyte (Hyophila
propagulifera, Musci) within 50km from Fukushima Daiichi Nuclear Power Plant
Sharifah Nabihah Syed Othman1, Toshinori Okuda1, Toshihiro Yamada1, Endo Satoru2,
1

Graduate School of Integrated Arts and Sciences, Hiroshima University

2

Graduate School of Engineering, Hiroshima University

Keywords: Hyophila propagulifera, Radiocesium, Environment factors, Fukushima accident

An analysis was conducted to understand environmental influence towards radiocesium concentrations inHyophila propagulifera collected around northeast region of Fukushima prefecture on November 2014, 3 years after
Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. The sampling area was conducted in three distance ranges
from FDNPP; remote (40 km - 50 km), middle (25 km – 40 km) and close (10 km – 25 km) ranges and two different
altitude areas; High elevation (>100 m above sea level) and Low elevation area (< 100 m above sea level). A total of 45
samples were collected to analyze the 137Cs concentration (Bq/kg) in relation to distance from FDNPP, altitude, air doserate, and slope angle.

The analyses revealed significant relationship between air dose rDWH ȝ6YKU  DQG UDGLRFHVLXP

concentration in the moss (R=0.87, p<0.001, Pearson’s rank correlation coefficient). The influence of altitude wasanalyzed between those ranges using ANOVA and the graph illustrated shows samples collected in remote range has
more influence in altitude compare to close range-collected samples. No correlation was found between radiocesium
concentration in the moss and the slope angle of the sampling site. The study site will be expanded and incorporated with
GIS tool to compare the contamination map distribution between radiocesium concentrations in the moss with the air
GRVH UDWH ȝ6YKU  UHFRUGHG RQ 0DUFK  7KH UHVXOWV PD\ UHYHDO WKH SRWHQWLDO RI WKH PRVV DV D ELRGHWHFWRU LQ
monitoring the contamination level in Fukushima.

IV㸫No. 
Knowledge Based Planning Model using Prioritized Optimization Dataset
Yen Hwa Lin 1, Sean L. Berry 2, Linda Hong 2, Margie A. Hunt 2
1

Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan2

Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, USA

Keywords: Knowledge based planning, prioritized optimization.
Radiation treatment planning is a multi-step process. While the goal is to produce consistent plans so that one can expect
consistent treatment outcomes, individual differences in skill, experience, and training lead to variability in the planning
result. Clinically, plan variability is managed by supplementing target and organ-at-risk dose-volume planning objectives
with allowable tolerances and variations. Many studies have been proposed to reduce plan inconsistency. One isknowledge based planning (KBP) which uses database of prior treatment plans to predict an acceptable plan for a newpatient. Another method is to produce treatment plans on the Pareto front by using a prioritized optimization (PO)algorithm. We hypothesize that using PO to populate plans for KBP modelling will efficiently create a high quality modelthat will predict the best possible plans for new sets of patients. Plans produced with PO-KBP will be compared withthose produced with traditional-KBP using dosimetric analysis.

IV㸫No. 
Detection of ATP-Dependent Inflammasome Suppression
on Innate Immune Responses in Sepsis
Ho Minh Van1, Hirohashi Nobuyuki1, Kong Weng Sheng2, Kanno Masamoto2,
Shime Nobuaki1
1Derpartment of Emergency and Critical Care Medicine, 2Derpartment of Immunology.
Graduate School of Biomedical and Health Sciences, Hiroshima University
Keywords: sepsis, immunoparlysis, DAMPs activities, ATP, innate immune responses
Introduction: Sepsis is characterized as an organ dysfunction caused by a dysregulated host response to infection.
Innate immune responses via a release of damage-associated molecular patterns (DAMPs) due to sepsis-induced
tissue damage might play additional roles in the complicated pathophysiology of sepsis. This study aims toinvestigate the mechanism of serum on DAMPs activities during sepsis. Materials and methods: We collected
serum samples from 10 traumas and 49 septic patients admitted to the ICU of Hiroshima University Hospital, and 5
healthy controls. For assays, THP-1 macrophages were treated by serum in the presence or absence of known
DAMPs molecules. Detection of IL-ȕDQGLQWUDFHOOXODUFRPSRQHQWVDVVRFLDWHGZLWKSDWKZD\ZHUHXVHGWRHYDOXDWHDAMPs activities. Results: We found a group of septic serum (85.7%) resulted in significantly lesser IL-ȕ
production. The suppression of IL-ȕVHFUHWLRQZDVREVHUYHGLQDOPRVWDOORIVHSWLFSDWLHQWVHUDLQWKHSUHVHQFHRI
ATP, but not in MSU, HMGB1. Furthermore, the suppression of IL-ȕVHFretion was evident from day-1 to day-7of admission period. We observed clear difference between survival and non-survival serum on suppressive profile
of IL-ȕVHFUHWLRQLQWKHSUHVHQFHRI$73DWGD\ S 2QPHFKDQLVPVRI$73-induced IL-ȕSDWKZD\ theconcentration of intracellular ATP, inositol 1,4,5, -triphosphate, and cytosolic calcium are significantly decreased in
septic serum day-1 (p<0.01). Especially, significant downregulation of active caspase-1 was observed in thepresence of non-survival septic serum day-7 (p<0.01). Conclusion: This study indicated that septic patient serum
contains ATP-dependent inflammasome suppressive factor, that inhibit IL-ȕ E\ LPPXQH FHOO YLD LQWUDFHOOXODU
pathway, possibly leading to immunoparalytic status. Therefore, we would like to propose this factors as
ATP-dependent Immunoparalysis factors (AIPF) in septic patient serum.

IV㸫No. 
Genome Editing Technique as a Useful Tool for Analysing Individual
Differences of Radiosensitivity
Ekaterina Royba1, Tatsuo Miyamoto1, Silvia Natsuko Akutsu1,
Kosuke Hosoba1, Yoshiki Kudo2, Satoshi Tashiro3,
and Shinya Matsuura1

1

Department of Genetics and Cell Biology, Research Institute for Radiation Biology and Medicine, Hiroshima University,

Hiroshima 734-8553, Japan2

Department of Obstetrics and Gynecology, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima734-8551, Japan3

Department of Cellular Biology, Research Institute for Radiation Biology and Medicine, Hiroshima University,

Hiroshima 734-8553, Japan
Keywords: individual radiosensitivity, cytokinesis-block micronucleus assay, genome editing
Current standards for radiological protection of the public have been uniformly established. However, numerous
scientific publications have been postulated that individual differences of radiosensitivity exist in human populations.
Development of screening assay for quantitative estimation of individual radiosensitivity might allow more personalized
treatment of cancer and improve therapeutic index of radiotherapy for patients with mild radiosensitive phenotype.
Line of studies in the field of radiation biology has suggested that the individual difference of radiosensitivity isprobably attributed to the nucleotide variants on the DNA repair genes. Thus, it is possible to develop a predictive assaythat will help to detect and estimate individual difference in radiosensitivity using a key genetic regulator of DNA
damage response in human cells.
Ataxia-telangiectasia mutated (ATM) is a gene encoding a key intracellular master kinase that control reparation of
DNA double-strand breaks (DSBs) induced by ionizing radiation (IR). It is estimated that about 1% of general
populations carry heterozygous mutations on the ATM gene. To evaluate impact of such mutations on individual
radiosensitivity, we have developed semi-automated cytokinesis-block micronucleus (CBMN) assay and applied it foradherent human cells.
Evaluation of size effects of mutations on DNA repair genes using CBMN assay might be affected by genetic
heterogeneity and confounding factors (such as age, gender, smoking, life style, etc.) existing in human population. To
overcome this issue, we have designed CRISPR/Obligare genome-editing strategy using a human cell line with uniform
genetic background (not affected by confounding factors). We have generated model cell lines and evaluated impact ofhomozygous and heterozygous mutations on ATM gene on individual radiosensitivity.
We propose that the genome editing technique could be implemented into radiation biology to investigate size effects
of mutations on DNA repair genes on individual radiosensitivity.

IV㸫No. 
Migration Pathway of Radioactive Materials from the Japan Sea
to the Okhotsk Sea
Yasushi Nabae1, 2), Sunao Miyashita1), Satoru Nakashima1, 3)
1) Radioactivity Environmental Protection Course, Phoenix Leader Education Program for
Renaissance from Radiation Disaster, Hiroshima University
2) Hydrographic and Oceanographic Department, Japan Coast Guard
3)Natural Science Center for Basic Research and Development, Hiroshima University
Keywords : Japan Sea, Okhotsk Sea, radiactive cesium, migration pathway.
1. Introduction
The Fukushima Daiichi Nuclear Power Plant (FDNPP) accident occurred in March
2011. 134Cs was detected in seabed soil at Agano River Mouth offing and Ishikari Bay.
However, the migration pathway of radioactive cesium from FDNPP is unknown. The
purpose of this study is identification of migration pathway of radioactive cesium.
2. Methods
We collected seabed soils at sampling sea areas of Figure 1. Radioactive cesium inseabed soils was PHDVXUHG ZLWKD JHUPDQLXPVHPLFRQGXFWRUGHWFWRU7KHȖUDGLRDFWLYLW\
was measured for 80,000 – 600,000 seconds.
3. Results and Discussion
Figure 2 shows that concentration of 134Cs at Agano River mouth offing
was the highest and 134Cs was not detected in seabed soil at Naoetsu offing. It
was suggested that Agano River mouth was an outflow source of 134Cs
and 134Cs was not migrated to Naoetsu offing.
Concentration of 134Cs decreased exponentially with migration distance.
There is a gap between Ishikari Bay and Soya Strait.

The Tsushima Warm

Current and the Soya Warm Current exist in this sea area and east Karafuto
Current merges near Soya. It was supposed that 134Cs migrated from the
Agano River mouth to the Notsuke Strait by ocean currents, and these ocean currents affected the change ofconcentration of 134Cs in seabed soil.

IV㸫No. The Importance of Public Participation to Intermediate the Lack of Radiation
Information after Fukushima Dai-ichi Nuclear Power Plant Accident
Wim Ikbal Nursal
Graduate School of Integrated Arts and Sciences
Hiroshima University
Keywords: citizen science, Fukushima, nuclear disaster, public participation, SAFECAST
The lack of radiological information for public after Fukushima nuclear disaster had motivated a group of citizen toassemble and craft a way to collect radiation data by developing a simple and affordable device for detecting and storingradiation data and system for centralizing and visualizing it. We motivated to see how comparable the data collected bylay people to that collected by official experts or scientists. The data used in this study were retrieved from Japan
Atomic Energy databases which represents the scientist-group data and SAFECAST databases represents citizen sciencedata. Specifically, the data were subset based on certain mission dates and/or comparable period within the geographic
boundary of Fukushima Prefecture. We perform correlation analysis on crowdsourced with expert data to see howmuch conformity between these two different datasets. The result shows that correlation of expert data of the second,
fourth, and seventh missions with the corresponding crowdsourced data are relatively high that is 0.93, 0.96, and 0.87
subsequently, which means the air dose rate values of two datasets are agree to each other. The magnitude of air dose
rate change within the period of November 2011 to October 2012 is about 25% and October 2012 to December 2013 isabout 30% for the expert data and 30% and 40% for the crowdsourced data in the same period. We also noticed that justright after the disaster, the extent of citizen measurement were spatially larger than those expert groups.

These

evidences, shows that the non-scientist group data is reliable relatively to the scientist group data. Based on thesefindings, we would like to emphasize the importance of public participation during the crisis and strongly encourage thegovernment to give more recognition and collaboration with citizen in data collection as a strategic response to anticipate
disaster in the future.

IV㸫No. The Spatial Pattern of Cs-137 Contamination of Evergreen Conifer Trees,Japanese Fir
Yurika Oba, Toshihiro Yamada
Graduate School of Integrated Arts and Sciences, Hiroshima University
Keywords: The Fukushima accident, radiocesium, natural forests, evergreen trees, needle-leaves
Japanese fir (Abies firma) growing in Fukushima was investigated for the assessment of radioactivity contamination
caused by the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. The study site was located approximately 45
km northwest from the FDNPP. Field survey was conducted in March 2016, 5 years after the accident. We sampledneedle-leaves of this species and soils under the sampled trees, and measured the concentration of radiocesium (Cs-137)
in samples. Using these results, we performed statistical analysis for spatial structures of contamination level of thesampled trees. We calculated the Moran’s I values to analyze the spatial autocorrelation of data.
The results from the statistical analysis indicated that there was no correlation between the contamination levels ofneedle-leaves and soil. Moreover, there was a difference in spatial pattern of the contamination levels between
needle-leaves and soil. These results indicated that the root uptake of radiocesium from soil into plant was very small inFukushima forests 5 years after the accident.
From the results of Moran’s I statistics, the significant positive spatial autocorrelation between the concentration of
Cs-137 in trees within 2.5 m was found, indicating that the sampling should be conducted by keeping at least 2.5 m
interval between target trees.

IV㸫2No. 
An Investigation of the Best Setting of Collimator Angle in
Automatically-Generated Volumetric Modulated Arc Therapyof Head and Neck Cancer
Uranchimeg Tsegmed1), Yuji Murakami1), Takeo Nakashima2), Tomoki Kimura1), Ippei
Takahashi1), Ikuno Nishibuchi1), Kentaro Miki1), Akito Saito1), Masahiro Kenjo1), Shuichi
Ozawa1), Yasushi Nagata1)
1) Department of Radiation Oncology, Hiroshima University
2) Division of Radiation Therapy, Hiroshima University Hospital
Keywords: Collimator angle, automated treatment planning, volumetric modulated arc therapy, head and neck cancer
Intensity modulated radiation therapy (IMRT) has been widely used as a curative treatment for head and neck (HN)cancers because of its ability to increase dose to the tumor and spare radiation dose to the salivary glands and othercritical organs. Recently, volumetric modulated arc therapy (VMAT), which is rotational variant of IMRT, is increasingly
being used as an effective and time-efficient alternative. However making the best VMAT plan is labor-intensive, time
consuming and plan quality in not consistent. Currently IMRT optimization helper softwares, which are fully automatedtreatment planning techniques, are available to apply for VMAT to solve the problems.
Like for manually-generated VMAT plan, an optimal choice of collimator angle of automatically-generated VMAT
(AG-VMAT) plan can increase the better dose distribution.
The objective of this study is to investigate the dose–volume variations of planning target volume (PTV) and organs at
risk (OARs) in nasopharyngeal cancer (NPC) patients planned with AG-VMAT when varying collimator angles todetermine best setting of collimator angle.
The double arc AG-VMAT plans will be created using Auto-planning (AP) software (Pinnacle3. 9.10.) for seven NPC
patients with collimator angle set to 20°/340°, which is a reference collimator angle pair of AP. The dose prescription will
be set at 46 Gy to large-field including both gross targets and the elective regions and 70 Gy at 2 Gy/fraction to the grossand high risk-target volumes delivered as a two-step VMAT planning. The AG-VMAT plans will be re-optimized withdifferent collimator angles using the same set of optimization objectives and priorities for each patients. Monitor units,
dose coverage of PTV and OARs’ doses will be compared in different collimator angles.
This study will determine the best setting of collimator angle in double arc automatically generated VMAT plan for NPC
patients.

IV㸫Understanding Mental Health Strength for Children in Fukushimafrom the View-point of Positive Psychology
Tatsuru Honda
Department of Psychology, Graduate School of Education, Hiroshima University
Keywords: Mental health strength, Psycho-educational program, Recovery from radiation disaster, Awareness of thestrength inherent
In the case of the Great East Japan Earthquake and the Fukushima Daiichi Nuclear Power Plant accident,
radiation disasters and related information disasters occurred in addition to natural disasters, which is quite different fromprior disasters. Fukushima disaster resulted in direct and indirect radiation influences on people. Due to these influence,
especially the long-term ones coursed by radiation, many people have not adjusted well mentally and physically. This is
the reality of Fukushima. Although most of children could have adjusted to the changed environment by utilizing theirmental health strength, some children who are vulnerable to these issues have been under the strong influence of that.
In this presentation, I discuss my research plan to investigate children’s mental health strength and develop a
psycho-educational program to grow the strength inherent for children in Fukushima based on fundamental studies inpositive psychology. This research encourages awareness of the inherent strengths of individuals and emphasizes finding
ways to support them. I believe that this paradigm succeeds because it helps people, nurture the foundation that forms
psychological well-being and targets ways to lower their felt sense of psychological burden. The idea of preventing
mental health issues by supplementing inherent strength is quite different from conventional models that focus on
psychopathology. When thinking about recovery and reconstruction processes in disasters, I think that ideas based on
mental health strength can lead to more effective prospects. At the present time, I am evaluating possible candidates forpsycho-educational program and their associated mechanisms for my research plan. My chief aim is to encouragechildren's own self-understanding as a means of encouraging awareness of the strengths inherent in each child. Whilespecific activities are still under consideration, I hope to discover ways to boost children's minds as they become adriving force in recovery from radiation disaster.

IV㸫30

Commissioning Optically Stimulated Luminescence Dosimeter (OSLD) System and
OSLD Batch
Chryzel Angelica Gonzales 1,2, Yasushi Nagata 1,2, Paola E. Alvarez 3,4, and Stephen F. Kry 3,41

Graduate School of Biomedical and Health Sciences, Hiroshima University

2

Department of Radiation Oncology, Hiroshima University Hospital3

Department of Radiation Physics, The University of Texas MD Anderson Cancer Center

4

Imaging and Radiation Oncology Core (IROC-H) - Houston

Keywords: nanodot, dosimetry, OSL, IROC
The commissioning process of an OSLD system is performed to determine the parameters needed for dose
determination of the system before it is released for clinical use. The Imaging and Radiation Oncology Core Houston QA
office (IROC-H) commissioned their nanodot OSLDs to be used for remote audit verification of photon and electron
beams output.
The OSLD commissioning process includes the evaluation of the reader and characterization of the detectors. The
reader used is the Microstar reader from Landauer. The detectors used are the nanodots, unscreened, from Landauer. The
commissioning tests performed on the reader include determination of the baseline for the QA measurements (Dark count,
LED count and PMT count), characterization of adapter used to support the detector within the reading process,reproducibility of the readings, and definition of a reading technique. The commissioning of the detectors includes theevaluation of correction factors needed to determine the dose based on the detectors’ readings. These corrections are dose
response, fading of signal, energy response, and individual response of each detectors in comparison with the batch(ECF).
An example of commissioning process was designed for training purposes with a Microstar reader, 5 adaptors and agroup of 136 nanodot OSLDs. The reference energy used was Cobalt-60 and the reference dose level was 100 cGy. The
results were evaluated using the acceptance criteria defined by IROC-H for these procedures. The corrections for dose
response and ECF were determined in the group of detectors. Correction factors were compared with the commissioning
data determined by IROC-H during the commissioning process for the OSLD batch.

IV㸫31

Organizing Committee

Director, Organization of the Leading Graduate Education Program
Mitsuo Ochi (President, Hiroshima University)
Program Director, Phoenix Leader Education Program (Hiroshima Initiative) for
Renaissance from Radiation Disaster
Kenji Kamiya (Vice President, Hiroshima University)
International Exchange Committee / Symposium Working Group
Toshinori Okuda, Chairman of Committee(Professor, Graduate School of Integrated Arts and Sciences, Hiroshima University)

Satoshi Tashiro(Professor, Research Institute for Radiation Biology and Medicine,
Hiroshima University)

Hironori Deguchi(Professor (Special Appointment), Graduate School of Science, Hiroshima University)

Dion Clingwall(Associate Professor (Special Appointment), Institute of Biomedical and Health
Sciences, Hiroshima University)

Yutaka Haramaki(Professor, Graduate School of Science, Hiroshima University)

VI-1

Symposium Working Group Student Members
Suzuki Tatsuhiko(Graduate School of Biomedical and Health Sciences, Hiroshima University)

Chryzel Angelica Babaan Gonzales(Graduate School of Biomedical and Health Sciences, Hiroshima University)

Basuki Triyono(Graduate School of Sciences, Hiroshima University)

Mari Ishimori(Graduate School of Integrated Arts and Sciences, Hiroshima University)

VI-2

CONTACT
Hiroshima University Phoenix Leader Program Oﬃce
1‐1‐1 Kagamiyama, Higashihiroshima 739‐8524
TEL: 082‐424‐4689
E‐mail: phoenix‐program@oﬃce.hiroshima‐u.ac.jph�ps://www.hiroshima‐u.ac.jp/en/phoenixlp