"fukushima and radiation monitoring" - comparison of external radiation exposures of high...

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,

N Adachi et al

Measurement and comparison of individual external doses of high-school students living in Japan, France, Poland and Belarus—the ‘D-shuttle’ project—

Printed in the UK

49

JRPREA

© 2016 IOP Publishing Ltd

2016

36

J. Radiol. Prot.

JRP

0952-4746

10.1088/0952-4746/36/1/49

Papers

1

49

66

Journal of Radiological Protection

Society for Radiological Protection

IOP

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, Japan2 Bragin High School, Bragin, Gomel region, Belarus3 Notre Dame High School, 1 Avenue Charles de Gaulle, 92100 Boulogne- Billancourt, France4 Aizu Gakuho High School, Ikkimachi Oaza Yahata, Yahata-1-1, Aizuwakamatsu, Fukushima 965-0003, Japan5 Nada High Shool, 8-5-1 Uozakikitamachi, Higashinada-ku, Kobe, Hyogo 658-0082, Japan6 Iwaki High School, Taira Aza Takatsuki 7, Iwaki, Fukushima 970-8026, Japan7 Giocante de Casabianca High School, Avenue Jean Zuccarelli, 20200 Bastia, France8 Ena High School, 1023-1 Ohi-cho, Ena, Gifu 509-7201, Japan9 Bois d’Amour High School, 9 Rue de la Garenne, 86000 Poitiers, France10 Fukushima High School, 5-72 Moriaicho, Fukushima, Fukushima 960-8002, Japan11 Paul Vincensini High School, Rue de la Quatriéme Division Marocaine de Montagne, 20600 Bastia, France12 ZS nr 2 im. Marii Skłodowskiej-Curie, Otwock, Poland13 I LO im. J. Słowackiego, Częstochowa, Poland14 Blaise Pascal High School n°46, 14, rue de Clermont-Ferrand, 246027 Gomel, Belarus15 ZS nr 5 im. Unii Europejskiej, III LO, Ostroleka, Poland16 Institute for Radiation Protection and Nuclear Safety (IRSN), BP17,92262 Fontenay-aux-Roses Cedex, France17 Asaka High School, 5-25-63 Kaisei, Koriyama, Fukushima 963-8851, Japan18 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. Introduction2. Methods and materials3. Results and Discussion　ⅰ Comparison of the dose rate　ⅱ Comparison of the individual doses4. 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

FukushimaPrefecture

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 - 0.1270.0907 - 0.1090.0725 - 0.09070.0543 - 0.07250.036 - 0.05430.0178 - 0.0360.00571 - 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 differentdespite the soil contamination?the natural background contribution happen to be lower

Fuku

yam

a

Nad

a

Nar

a

Tajim

i

Ena

Kana

gaw

a

Asak

a

Iwak

i

Aizu

Tam

ura

Adac

hi

Fuku

shim

a0

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 070.0

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


0.2

0.4

0.6

0.8

1.0


←Miyakoji in 20-km zone


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


0.2

0.4

0.6

0.8

1.0


← Kunimi (60km)


0.2 µSv/h→



32


33

33


0.2

0.4

0.6

0.8

1.0


Not much difference


0.2 µSv/h→


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