"Fukushima and radiation monitoring" - comparison of external radiation exposures of high school students in Japan, France, Poland and Belarus

Measurement and comparison of  
individual external doses of
high-school students  
living in
Japan, France, Poland and Belarus
—the ‘D-shuttle’ project—
Hayano & Onodera, Feb 08, 2016 @ FCCJ
Ryugo Hayano, Prof. Dr., U-Tokyo
Haruka Onodera, Fukushima High School

based on the open-access paper published in

“Journal of Radiological Protection” on Nov 27, 2015

co-authored by 233 high school students, teachers, and experts
49
Journal of Radiological Protection
Measurement and comparison of individual
external doses of high-school students
living in Japan, France, Poland and
Belarus—the ‘D-shuttle’ project—
N Adachi1, V Adamovitch2,Y Adjovi3, K Aida4, H Akamatsu5,
S Akiyama6, A Akli7, A Ando8,T Andrault9, H Antonietti3,
S Anzai10, G Arkoun3, C Avenoso11, D Ayrault9,
M Banasiewicz12, M Banaśkiewicz13, L Bernardini11,
E Bernard7, E Berthet11, M Blanchard3, D Boreyko14,
K Boros15, S Charron16, P Cornette9, K Czerkas15,
M Dameron11, I Date17, M De Pontbriand3, F Demangeau9,
ł Dobaczewski18, L Dobrzyński19, A Ducouret3, M Dziedzic20,
A Ecalle9, V Edon9, K Endo21,T Endo21,Y Endo21,
D Etryk12, M Fabiszewska18, S Fang4, D Fauchier9,
F Felici7,Y Fujiwara10, C Gardais9, W Gaul20, L Gurin9,
R Hakoda22, I Hamamatsu6, K Handa10, H Haneda10,T Hara10,
M Hashimoto1,T Hashimoto8, K Hashimoto21, D Hata1,
M Hattori10, R Hayano23, R Hayashi22, H Higasi5, M Hiruta6,
A Honda6,Y Horikawa8, H Horiuchi24,Y Hozumi17, M Ide25,
S Ihara8,T Ikoma24,Y Inohara22, M Itazu24, A Ito8, J Janvrin9,
I Jout11, H Kanda5, G Kanemori5, M Kanno10, N Kanomata10,
T Kato24, S Kato24, J Katsu5,Y Kawasaki21, K Kikuchi4,
P Kilian26, N Kimura25, M Kiya10, M Klepuszewski15,
E Kluchnikov14,Y Kodama5, R Kokubun10, F Konishi22,
A Konno6, V Kontsevoy2, A Koori6, A Koutaka6, A Kowol27,
Y Koyama4, M Kozioł13, M Kozue1, O Kravtchenko14,
W Kruczała12, M Kudła28, H Kudo29, R Kumagai24,
K Kurogome25, A Kurosu29, M Kuse25, A Lacombe3,
E Lefaillet3, M Magara17, J Malinowska26, M Malinowski18,
V Maroselli7,Y Masui29, K Matsukawa29, K Matsuya17,
B Matusik20, M Maulny9, P Mazur27, C Miyake29,Y Miyamoto4,
K Miyata1, K Miyata5, M Miyazaki30, M Molȩda20,T Morioka1,
E Morita24, K Muto1, H Nadamoto5, M Nadzikiewicz28,
K Nagashima29, M Nakade22, C Nakayama25, H Nakazawa17,
and Belarus—the ‘D-shuttle’ project—
Society for Radiological Protection
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.
Any further distribution of this work must maintain attribution to the author(s) and the title of the work,
journal citation and DOI.
0952-4746/16/010049+18$33.00 © 2016 IOP Publishing Ltd Printed in the UK
J. Radiol. Prot. 36 (2016) 49–66 doi:10.1088/0952-4746/36/1/49
50
Y Nihei4, R Nikul2, S Niwa8, O Niwa30, M Nogi6, K Nomura29,
D Ogata8, H Ohguchi31, J Ohno24, M Okabe17, M Okada22,
Y Okada6, N Omi25, H Onodera10, K Onodera25, S Ooki21,
K Oonishi29, H Oonuma10, H Ooshima8, H Oouchi1,
M Orsucci11, M Paoli11, M Penaud9, C Perdrisot9, M Petit9,
A Piskowski15, A Płocharski15, A Polis13, L Polti3,
T Potsepnia14, D Przybylski12, M Pytel28, W Quillet9,
A Remy3, C Robert9, M Sadowski19, M Saito10, D Sakuma1,
K Sano5,Y Sasaki24, N Sato4,T Schneider32, C Schneider3,
K Schwartzman2, E Selivanov14, M Sezaki25, K Shiroishi21,
I Shustava14, A Śniecińska28, E Stalchenko14, A Staroń27,
M Stromboni7, W Studzińska26, H Sugisaki17,T Sukegawa21,
M Sumida22,Y Suzuki17, K Suzuki10, R Suzuki10, H Suzuki10,
K Suzuki6, W Świderski18, M Szudejko33, M Szymaszek27,
J Tada34, H Taguchi22, K Takahashi4, D Tanaka5, G Tanaka29,
S Tanaka24, K Tanino4, K Tazbir13, N Tcesnokova14, N Tgawa5,
N Toda6, H Tsuchiya17, H Tsukamoto8,T Tsushima1,
K Tsutsumi25, H Umemura8, M Uno24, A Usui25, H Utsumi29,
M Vaucelle9,Y Wada17, K Watanabe4, S Watanabe22,
K Watase29, M Witkowski26,T Yamaki21, J Yamamoto4,
T Yamamoto17, M Yamashita22, M Yanai21, K Yasuda22,
Y Yoshida1, A Yoshida21, K Yoshimura25, M Żmijewska15 and
E Zuclarelli7
1
Adachi High School, 2-347 Kakunai, Nihonmatsu, Fukushima 964-0904, Japan
2
Bragin High School, Bragin, Gomel region, Belarus
3
Notre Dame High School, 1 Avenue Charles de Gaulle, 92100 Boulogne-
Billancourt, France
4
Aizu Gakuho High School, Ikkimachi Oaza Yahata, Yahata-1-1, Aizuwakamatsu,
Fukushima 965-0003, Japan
5
Nada High Shool, 8-5-1 Uozakikitamachi, Higashinada-ku, Kobe, Hyogo 658-0082,
Japan
6
Iwaki High School, Taira Aza Takatsuki 7, Iwaki, Fukushima 970-8026, Japan
7
Giocante de Casabianca High School, Avenue Jean Zuccarelli, 20200 Bastia, France
8
Ena High School, 1023-1 Ohi-cho, Ena, Gifu 509-7201, Japan
9
Bois d’Amour High School, 9 Rue de la Garenne, 86000 Poitiers, France
10
Fukushima High School, 5-72 Moriaicho, Fukushima, Fukushima 960-8002, Japan
11
Paul Vincensini High School, Rue de la Quatriéme Division Marocaine de
Montagne, 20600 Bastia, France
12
ZS nr 2 im. Marii Skłodowskiej-Curie, Otwock, Poland
13
I LO im. J. Słowackiego, Częstochowa, Poland
14
Blaise Pascal High School n°46, 14, rue de Clermont-Ferrand, 246027 Gomel,
Belarus
15
ZS nr 5 im. Unii Europejskiej, III LO, Ostroleka, Poland
16
Institute for Radiation Protection and Nuclear Safety (IRSN), BP17,92262
Fontenay-aux-Roses Cedex, France
17
Asaka High School, 5-25-63 Kaisei, Koriyama, Fukushima 963-8851, Japan
18
ZS Centrum Edukacji im. Ignacego łukasiewicza, Plock, Poland
N Adachi et alJ. Radiol. Prot. 36 (2016) 49
2

3
D-Shuttle Project

~ Measurement and Comparison

of Individual Doses of High School Students
Inside and Outside of Fukushima Prefecture~
Physics team from the Super Science Club of Fukushima High School
Haruka Onodera

4
Contents
1. Introduction
2. Methods and materials
3. Results and Discussion
ⅰ Comparison of the dose rate
ⅱ Comparison of the individual doses
4. Conclusion

5
1.Introduction
The accident at the Fukushima Daiichi Nuclear power plant

→Contamination from radioactive substances
In order to understand
the current situation of Fukushima
Measurement and comparison
of the individual doses inside and outside of
Fukushima prefecture

6
2.Methods and materials
Participants
6 schools inside the Fukushima prefecture
6 schools in other prefectures in Japan
12 overseas areas
Total of 216 people

Air dose rate (µSv/h)
Japan
Fukushima
Prefecture
Fukushima Dai-ichi NPP
20 km
20 km
Boundary of the restricted zone
12 (Fukushima 0.36 µSv/h)
7 (Asaka 0.24 µSv/h) 8 (Iwaki 0.13 µSv/h)
9 (Aizu <0.1 µSv/h)
10 (Tamura 0.30 µSv/h)
11 (Adachi 0.38 µSv/h)
80 km
80 km
6 (Kanagawa)
5 (Ena)
4 (Tajimi)3 (Nara)
2 (Nada)
1 (Fukuyama)
Fukushima
(see Fig. 1)
Natural Radiation (µGy/h)
0.127 <
0.109 - 0.127
0.0907 - 0.109
0.0725 - 0.0907
0.0543 - 0.0725
0.036 - 0.0543
0.0178 - 0.036
0.00571 - 0.0178
6 participating high schools  
in Fukushima prefecture
6 participating high schools
in other prefectures
↓note: different color scales↑
(air dose rate is from the
government airborne survey, as of
November 2014)
note the evacuation-zone
boundary (as of 2014)
(air dose rate due to natural
radiation estimated from soil
sample analysis, The geological
society of Japan )
Fig.1
Fig.2 Hayano & Onodera, Feb 08, 2016 @ FCCJ
7

Figs.3,4,5
Chernobyl
8
8

Fig.6
9
Instrument

Personal dosimeter (Chiyoda Technol Corporation)
“D-shuttle”

・Recording interval : 1 hour

・Measured radiation type :

γ-ray (also including natural radiation)

・Minimum value : 0.01μSv

Method

• Participants carried D-shuttle for
two weeks

• Their location was recorded in a
journal
Based on the journal, the data was classiﬁed and analyzed
10

Table1
11

Fig.7
12

13

Fig.8
14
0
0.5
1
1.5
2
1(Fukuyama)
2(Nada)
3(Nara)
4(Tajimi)
5(Ena)
6(Kanagawa)
7(Asaka)
8(Iwaki)
9(Aizu)
10(Tamura)
11(Adachi)
12(Fukushima)
Poitiers(France)
Boulogne(France)
Bastia(France)
Belarus
Poland
mSv/y
Outside of
Fukushima
EuropeInside of
Fukushima
Comparison of the individual doses (annual basis)
Outside of
Fukushima
Inside of
Fukushima
Europe

Fig.9
15

16

Why are personal doses in Fukushima not much diﬀerent

despite the soil contamination?

the natural background contribution happen to be lower
Fukuyama
Nada
Nara
Tajimi
Ena
Kanagawa
Asaka
Iwaki
Aizu
Tamura
Adachi
Fukushima
0
50
100
150
nGy/h or nSv/h
Outside of Fukushima Inside of Fukushima
Dose rate Personal dose distribution
（natural + cesium）
estimated natural background from  
■Thorium 
■Uranium 
■Potassium-40  
concentration in soil samples
In Fukushima, the natural
background contribution is lower
than in other parts of Japan→the
total doses (natural + cesium) are
not much diﬀerent from other parts
of Japan
17
Fig.12

18

Fig.11Hayano & Onodera, Feb 08, 2016 @ FCCJ
19

20
４. Conclusion
• We conducted an investigation to measure and
compare individual doses inside and outside of
Fukushima prefecture.

• At the moment, high school students in Fukushima
do not suﬀer from signiﬁcantly higher levels of
radiation.

A brief history
21
21

Summer 2014 Japanese co-authors came to Fukushima
22
22

Summer 2014 - analyzing data
23
23

Summer 2014
24
24

December 2014
25
25

French high-school students (co-authors of the paper)
came to Fukushima in August 2015 with “D-shuttle”
26
26

Jul 31 Aug 01 Aug 02 Aug 03 Aug 04 Aug 05 Aug 06 Aug 07
0.0
0.2
0.4
0.6
0.8
1.0
Dose (incl. natural sources) µSv/h
← Fukushima →← Paris → ← Tokyo→
←Tomioka(10km!)
CDG
security→
French embassy
security→
D-shuttle data, 8 students, 4 teachers & experts
0.2 µSv/h→
27

28
28

0.0
0.2
0.4
0.6
0.8
1.0
←Miyakojiin20-kmzone
0.2 µSv/h→
29

30
第３４回原子力災害対策本部配布資料： 
田村市における避難指示区域の解除について

31
31

0.0
0.2
0.4
0.6
0.8
1.0
←Kunimi(60km)
0.2 µSv/h→
32

33
33

0.0
0.2
0.4
0.6
0.8
1.0
Not much difference
0.2 µSv/h→
34

"Fukushima and radiation monitoring" - comparison of external radiation exposures of high school students in Japan, France, Poland and Belarus

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