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SUN 08 MARCH 2015
11.00 -18.30

Fukushima Accident

a personal recollection of an "antimatter" physicist

Ryugo Hayano,  U...
2011 2012 2013 2014 2015

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Today:  March 8, 2015 TI

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i the Internet era

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teach in Tokyo, 
“antimatter” team leader at CERN,  Geneva since 1997

L DAN BROW N Just below my office at CERN

  I ‘I’ ...
C . - C 33; C L“  fa

%§TIaII%AJa*am*£ii%1fii$%'a3€fiaTfi
mmwk mm&usmu
Lung cancer survivor
What happened at
Fukushima Dal-ichi?
5

 

. %
 Earthquake
.  M9

L

  
  
 

<—Fukushima
Daiichi

E‘: 
.,  /’ 1340s and 13705
Bq/ m2

doom <
IEIX1 33a
5113: 7...
6 Nuclear Reactors @ Fukushima Dal-ichi

 

Units 1-3 were operating on March 11, 2011

Unit 1 Unit 2 Unit 3 Unit 4 Unit 5...
BWR “Mark-1 ”

Reactor building

Spent fuel storage pool/ 

Pressure vessel

    
  

   

Fuel

assembly
Containment
vess...
External power line destroyed by earthquake
but diesel generators turned on

40 minutes later 
Tsunami flooded diesel gene...
No electricity,  no cooling, 
core temperature >25OO °C

Fuel rods melted down
H20 + Zr alloy -> H2 gas -> explosion

 

3...
____'.   ‘_ .  .1 "g'«"§'_)_'; _.5,
. ,  g 4- Unit 1, Hydrogen explosion,  March 12 15:36?“
iv , , "“-’  1  . ~T'. l,‘_-"_...
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ua | l¢gHI lndlmlng p«llh poII Ruolnmulflul 1.:  I mum-u I u of squeak. " so.  mm

  

...
Food,  water,  milk 

 

Strict regulatory criteria

2011Mar17~ 20-|2Apr1~
OProvisional regulation values 0 New standard l...
In Fukushima,  134113703 need to be monitored

(but not 90Sr,  nor Pu)

 

 

Maximum 7 4
concentration 10 10 10 Bq/ m2
ma...
Chernobyl & Fukushima
soil contamination (137Cs)

  

same-scale comparison

  

 
   
 
      

Total caesium-137 1
(nucl...
Concerns — effect of low-dose exposures to the population

    

134,137CS
Important take-home message

,4-.9»-we-s—: .s-. s.an4-ac-9 R7a  assaagu-«: ;—»s. .u-nun. -we-¢. ..~ars; —»-pea-M. -.-w

 
...
Why am I here today’? 
kumfibbercfl @havano
March 11, 2011, Tokyo University
(was a physics department chair)
2011 2012 2013 2014 2015

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*5’)  March 12,2011 14:22
bwit...
2011 2012 2013 2014 2015

1 2 3
My first graph:  Mar 13, 2011, 07:49 twitter» new-no

Dose rate @ Fukushima Dal-ichi main ...
Ranked 7th among the most influential twitter accounts

 

http : //www. cl . ecei' . tohoku. ac. jp/ prj3 1 1/trend/ rted...
Fe , , A 2 _
S Science Magazine Blog

ii’ top 100 scientists on twitter
C‘)ct’ot3er2014: I

‘L

MARTYN GREEN
20. Steven Pinker,  Cognitive scientist

145,000 followers @gp_inli(l'_mp: //twittercom/ @sarm<g)_
Citations:  49,933 K~in...
Power of the social media

twitter$
is bi—directional
" _ ' nu umxmgnultnamw
mus nouns: 

Summer,  2011

contamination maps &
various monitoring results
became available —

but...
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proposed to measure school lunch, but was denied by MEXT
...
12345678101112123456789101112123456789101112123456789101112123

 

WEB poll (7000 replies in 2 days)

533*? ->«‘—‘t1!‘/ '7...
2011 2012 2013 2014 2015

r

 

Proposed to MEXT vice minister,  Funded JFY 2012-2014
 Lunch test result - Fukushima city
...
Power of the social media — 2

twitter’
connects people
' J J"!  ‘. .' fr _ 1st 'lOlf‘iIl  ‘i 1;:  ‘cl 1 1.1.1511 .31 7 1  :31 11:2“ val  -i g A 61 Al 5 1 a '7‘ 1:1“ : i1m> 5nI1:...
Internal Exposure

(how much radioactive cesium are Fukushima people eating? )
Average dose of Japanese (before the accident)
6 mSv/ y (2.1 without medical

The goal is to limit the EXCESS public dose ...
K-40 — about 4,000 Bq in adults’ body

—> ~0.2 mSv/ year
Half life,  1.3 billion years! 

 

10 B-1 3 my
- 89.23/,  0+
40
...
.4‘. 

I ’ mm ‘ " / ' '
 Fukushima c.  
:  , ': -Pop.  290k a" 1

         
       

Chernobyl studies, 
i. e.,  soil—>foo...
ovo / ' r'ray
9 i C03 1 whole body
3 counter
€¥§: §,/ :9 r_ray

.
WBC spectra (simulations based on actual data)

 

1 K I I I
|34cs‘I37cs
SEES,  100Bq/ body- _ 3‘(’)°:2<1/: °‘; Y_

~ , ' ...
123456789101112123456789101112 456789101112123456789101112123

 

my first medical paper

No.  /1] Fruit.  Jpn,  A<'ad. . ...
l37Cs concentration (Bq/ kg) in 2012, N=21785

 

99% (children 100%) were
below the detection limit

~ 0.02 mSv/ y << 40K...
1370s in Japanese adult male,  1959-1994

 

     

   

sou
<—J_9.6A ~10Bq/ kg

t sm
‘'2
9
A
1 III]
3
7
3
Fl 300
I
3
3 20...
Why so low’?
this is how the rice bags are measured

 

>107 rice bags (30 kg each) measured
every year

V 71 exceeded the 100 Bq/ kg l...
Fukushima soil,  rich in clay (vermiculite)

 

These do not go
back to water

layered {
vermiculite

 

9
C ‘%
These can ...
Soil —> rice transfer factor

     
  

  

1,200 “ 777 7 7 77777 77
11°00 Potassium fertilizer
80° VERY effective
:  140 ...
Part 4

External Exposure

Alli;  I*r -<
noiuii

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Personal dosime y results, 

Percentage

   
   
     
 

so

40

30

20

10

0

I
Percentage. 

50

40

30

20

10

0

Pe...
Fukushima city school children’s external dose

—L
03>

. _A
O
O
O

100

Log (Frequency)

Percentage <1 mSv/ y : 
2011 (51...
Part 5

BABYSCAN story
So,  no problem whatsoever? 

No.  Still lots of problems. ..

Mothers,  in particular,  are really
worried about their ch...
Scientifically,  it is sufficient to measure parents

but mothers want to have their babies
measured
Eating 3 Bq every day 

 

500*
.  — adult
4001
E — 15 y
.3 300: ------ -- - - detection limit of typical wac ----- --:  —...
SO I made “BABYSCAN”

 

3 units have so far been deployed

OPEN ACCESS
IOP Publishing I Society for Radiological Protecti...
“BABYSCAN” — world’s first WBC dedicated for small children

HD

NHK WORIQT i  '* 7

Courtesy,  NHK World
BABYSCAN,  fully assembled but for the ergonomic cover
(NOT a baby—friendly device,  yet)

4 la
rgg Na’ detectors

6; O
f/...
BABYSCAN:  design is an important element

 Jab! 

Designed by Prof.  Shunji Yamanaka,  U.  Tokyo

Hayano et al. , BABYSCA...
>Radioactive cesium NOT
detected from any of the
~2000 babies, 
including the families regularly
consuming local food

>Th...
questionnaire results —
parents are still much worried about

water,  rice,  .. .

 

July 2014 — Aug 2014

_ water

60: r...
BTW

data dissemination by the government
— gradually getting better -
Jjcifi ['1‘-' Fisheries agency (now showing graphs)

5.4‘r. i!. w‘i *i¥1'r“ll'Ei‘li

 

= l’~'1 > étflfllflfi > fifififllfifittwfiiiifl...
Fukushima prefecture portal is now multilingual (machine translation)

This page is uanslated using machine translation.  ...
|Real time and oliokable radiation monitor map »

l‘EEL%fi5l§= .lia"é3RllE? “J7°

Fukushima prefecture radioactivity measur...
searohable rioe—test database with a graph (since 2012)

 

Inspection information 2014

Fukushima Association for Securin...
Conclusions
Despite soil contamination, 

i
l

L. ... ... ... .._. _.. ._. m

 

i

the internal exposure of Fukushima
people is negli...
moo. -u-ea-3

{BABYSCAN is also a communication tool
— takes time & efforts to regain the trust of

people 3

 

Radiation...
take-home message again

weMr. ... w.u-mm»mmm«mm-uwuagwmwm-»m. «~»-a. wu. mJwawwww_w¢¢». .mamm«-9u«i-«. m.«<. -nu. -u.4.—~...
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Fukushima accident - a personal recollection of an "antimatter" physicist

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Fukushima accident - a personal recollection of an "antimatter" physicist

  1. 1. SUN 08 MARCH 2015 11.00 -18.30 Fukushima Accident a personal recollection of an "antimatter" physicist Ryugo Hayano, U. Tokyo & CERN : LLOYD HOTEL 5 lo‘? }": .f.1Il’R“I‘rE"‘. E"‘5§)'m w: .IIo: dh: o:I. ;:m twitterfi h°V°"°
  2. 2. 2011 2012 2013 2014 2015 123456789101112123456789101112123456789101112123456789101112123 Today: March 8, 2015 TI 1458*“ day (4 y — 3 d) since the earthquake & Fukushima Dal-ichi accident _fg*‘~. ; . :: i_—, ';; ;!‘( . _.. ..- so . -4 , -e. ..cc A » , s.~l+~~t~ . ;.~. ~,, , >‘ S1,. __. .,. ,.. .. .'T: ..‘. :I, '._. .IIL_I-. ._L. .;: ».. ;,". :'. ~. .,_s, .., ..z- . ~ e, —~«. .» _~ — ’_ __ ____ _______, _ ____
  3. 3. ‘J. I; L: ‘ I‘- _ . I g. .3‘ 6- ' V ‘ A i the Internet era .1 I) : ‘—- _" - y -' a. '1. _ ; .u , , ‘I The first nuclear a cident n ~ I I . I 1 r _' I‘: ‘ <'! .Ei': '. ’1'), “.£ 2 ‘ '_-_‘ ""9.~ at . -. - ~ I . I I; I ~" '- . _ I W. ‘A S ‘ I 7 I .
  4. 4. teach in Tokyo, “antimatter” team leader at CERN, Geneva since 1997 L DAN BROW N Just below my office at CERN I ‘I’ ‘T 7 ”7 *m; "” " 3‘ _. _ 5;; ‘/ vi’ ~ ’* ANGl; ‘LS&DEMONS NOW A MAJOR MOTION PICTURE
  5. 5. C . - C 33; C L“ fa %§TIaII%AJa*am*£ii%1fii$%'a3€fiaTfi mmwk mm&usmu
  6. 6. Lung cancer survivor
  7. 7. What happened at Fukushima Dal-ichi?
  8. 8. 5 . % Earthquake . M9 L <—Fukushima Daiichi E‘: ., /’ 1340s and 13705 Bq/ m2 doom < IEIX1 33a 5113: 7 H111 SIX - at HID: - COCK ED: - lflk IR 7 80: It‘! (tn : . 10: l Areas wneve Ieaolng were no| oblamed
  9. 9. 6 Nuclear Reactors @ Fukushima Dal-ichi Units 1-3 were operating on March 11, 2011 Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 78.4 78.4 110.0 Electric output (10,000 kW) Commissioning 1971 1974 1977 1978 1979 Fuel assemblies 400 548 548 548 764 Number of control rods 97 137 137 137 185
  10. 10. BWR “Mark-1 ” Reactor building Spent fuel storage pool/ Pressure vessel Fuel assembly Containment vessel Control Rods . Suppression Vent Pipe / Chamber (SC) core of Bwn
  11. 11. External power line destroyed by earthquake but diesel generators turned on 40 minutes later Tsunami flooded diesel generators —> total station blackout _ Reactor building Altitude of site 4 . I h ' ht - - Supposed height AC_": t1u4am 9'9 10m (unit 1-4) +5_7m 13m (l2l_nlt 5-6) sea TuFb__ine building water pump ' laE: >n n 3: uuuuuuuuuu uuI: u _- ‘— sea level Wave block fence D/ G: P/ C
  12. 12. No electricity, no cooling, core temperature >25OO °C Fuel rods melted down H20 + Zr alloy -> H2 gas -> explosion 3500 1 000 3000 800 2500 2000 °°° 1 500 400 1 000 200 500 (30) 3Jl11l? .l9dl. ua_[ a. io3 (Bx) uog; :>npoJd ua6o1pAH [3 Temperature 0 I Hydrogen 0 a 3/11 3/12 3/13 3/14 3/15 3/16 3/17 3/18 Date in 2011
  13. 13. ____'. ‘_ . .1 "g'«"§'_)_'; _.5, . , g 4- Unit 1, Hydrogen explosion, March 12 15:36?“ iv , , "“-’ 1 . ~T'. l,‘_-"_-:1,‘ 1.1; 5 .0 3 , _ _ .1 1 15"‘ . ‘~ ; 3 Unit 2, explosion? March 15 6:20 ’ 1_i—': _;_-. 0 -75 , ~_ m V , — = '—i‘-eeii g - ~ 1 *1 - ~- 2'. ’ -. Z “T” v "i. ,-"~, ‘,. .' Ii: >i. ‘ ‘ ‘r ‘ I I _>_/ V ‘N-9-3 ' 15“ A gen explosion. March 14 . - 1‘, ‘H _ "_‘__ _ ‘ 1 I. , -i ‘ - l - ‘i 1-'-. . . . ‘ ’ i'_ii<— Unit 4, Fire. March 15 9:38 ' ~. _: —‘/ ‘I. no fuel in the reactor, but spent fuel pool was full) ' ~41 :5 1” v "' ‘ t‘ "~fg~f_‘a_“s -
  14. 14. In-mnni mu. union". .. I ucuvkc mo ua | l¢gHI lndlmlng p«llh poII Ruolnmulflul 1.: I mum-u I u of squeak. " so. mm Evacuation order 3km — March 11 21 :23 10km - March 12 5:44 20km — March 12 18:25 (~100,000 people) after ~4 years, most of the people are still unable to return, even though the , , at , radiation levels in some areas " 7 7' ‘» have become low
  15. 15. Food, water, milk Strict regulatory criteria 2011Mar17~ 20-|2Apr1~ OProvisional regulation values 0 New standard limits for for radioactive cesiuml radioactive cesium 2 1 we dairy 1 00 10 50 General Foods Bq/ kg Bq/ kg
  16. 16. In Fukushima, 134113703 need to be monitored (but not 90Sr, nor Pu) Maximum 7 4 concentration 10 10 10 Bq/ m2 max C0l'lC. Nuclides Half life *‘ (Ba/ m2) Cs-134 1.4x1O7 Cs-137 i.5x107 I-131 5. 5 x 104 Sr—89 2, 2 x 10‘ Sr-90 5_ 7 x 103 Pu-238 4. 0 Pu 239+240 2.4x1O y Ag 110m 250d 3. 3x104 Te 129m 34d 2_ 7 X106 *1 : 23 E 6 H 14 EH; -F. $l: ‘E&§7lfi‘i|5f7%I: §’d-‘*1
  17. 17. Chernobyl & Fukushima soil contamination (137Cs) same-scale comparison Total caesium-137 1 (nuclear weapons test. Chernobyl. .. .) deposition Smaller area, less amount but dense population I y kBqIm’ 1480 185 5 40 1.08 10 2
  18. 18. Concerns — effect of low-dose exposures to the population 134,137CS
  19. 19. Important take-home message ,4-.9»-we-s—: .s-. s.an4-ac-9 R7a assaagu-«: ;—»s. .u-nun. -we-¢. ..~ars; —»-pea-M. -.-w rys. ;.¢s. au. .=. .-a ~am«eeav, .sn. «a. »-= ».; ¢=au. —s, -:-—ev Fukushima Dai—ichi, serious accident 1 However, 1 i No death due to ACUTE radiation effects 1 l l DISCERNIBLE long—term health effects (e. g., cancer increase, incl. thyroid) unlikely 1 source — WHO, UNSCEAR, IAEA «wt . L. ‘~»? ~<A-t65-- -. >.-= e.4n. zs. u.= z;s«, :.. e;sa»a. -aw»: -.= <;.
  20. 20. Why am I here today’? kumfibbercfl @havano
  21. 21. March 11, 2011, Tokyo University (was a physics department chair)
  22. 22. 2011 2012 2013 2014 2015 12‘3456789101112123456789101112123456789101112123456789101112123 *5’) March 12,2011 14:22 bwitherfi havdno 89 characters Japanese tweets contain more info ttf‘, Sr90 «E ck 1; l: '7 5 VO)1'%J‘§%"C‘$l. ;‘ Z>i”€: §%l? l’~J7ZC E5Z§1’l$lfifiZ7T: §—%. Does it mean that the 662 keV gamma ray from Cs137 decay was detected at Fukushima Dai—ichi? Cs137 does not exist in nature, and together with Sr90, typical fission product isotope. 181 Characters
  23. 23. 2011 2012 2013 2014 2015 1 2 3 My first graph: Mar 13, 2011, 07:49 twitter» new-no Dose rate @ Fukushima Dal-ichi main gate uSv/ h ‘°°°° W This inspired many people volunteers followed ’°°°° (the number of my followers 3000—>>150,000 in a few days) Mar 12, Mar 13, 2011 2011 1 iullllIlium-luulllluul . ... . . .l . ... .. I . ... ... ... ... ... ... ... ... ... ... .. . . 0 n I I I I I A I I ll "v~i'i63—l30i-I 3117105‘! 101'? ’Hl; '(lI'V<Xl'$'L' "'! ::2I‘-1l)0‘. r3 ‘i lli3C'~'. "a0?I-. ‘ ’t-4.l£35V30Z'I' ‘+'lr1'IE§3U‘. .-I’ '+fi‘. ‘i5-$207.2‘ -'l-i'I',3E". l0ii. '
  24. 24. Ranked 7th among the most influential twitter accounts http : //www. cl . ecei' . tohoku. ac. jp/ prj3 1 1/trend/ rteduser/ top100.html llfiiii. :i. —1j' RRTIEHSI 1 @NHK_PR 630459 2 @nhk_seikatsu 304824 3 @Asahi_Shakai 279259 4 @nhk_news 209515 5 @nhk_HORIJUN 173995 6 @tsuda 165434 —) 7 @hayano 145436 8 @nhk_kabun 127916 9 @earthquake_jp 114806 10 @touhokujishin 112592 sO. ,,Ce_Toh0k, ,U, ,,V_
  25. 25. Fe , , A 2 _ S Science Magazine Blog ii’ top 100 scientists on twitter C‘)ct’ot3er2014: I ‘L MARTYN GREEN
  26. 26. 20. Steven Pinker, Cognitive scientist 145,000 followers @gp_inli(l'_mp: //twittercom/ @sarm<g)_ Citations: 49,933 K~index: 105 Total number of tweets: 1674 Harvard University, United States 21. Richard Wiseman, Psychologist 135,000 followers @RichardWiseman (http: //twitter. com/ @FiichardWiseman)_ Citations: 4687 l<—inde><: 209 Total number of tweets: 22,600 University of Hertfordshire, United Kingdom 22. Ryugo Hayano, Nuclear physicist 124,000 followers %y@(h_ttp: //twittercom/ @hayfi)_ Citations: 956 K—inde><: 319 Total number of tweets: 56,500 . University of Tokyo, Japan
  27. 27. Power of the social media twitter$ is bi—directional
  28. 28. " _ ' nu umxmgnultnamw mus nouns: Summer, 2011 contamination maps & various monitoring results became available — but increasing number of tweets by worried mothers: what about food safety? r ,4:. ‘ AiribornefiMonitoring Survey, April 201
  29. 29. 123456 89101112123456789101112123456789101112123456789101112123 proposed to measure school lunch, but was denied by MEXT MEXT: What if radioactive cesium is “really” detected’? School teachers, school boards, etc. , will not be able to cope with such situations
  30. 30. 12345678101112123456789101112123456789101112123456789101112123 WEB poll (7000 replies in 2 days) 533*? ->«‘—‘t1!‘/ '7Ll5EE WEB 797- V‘ (¥fi*$*! ¥€-‘IWE 4539 $! !‘3E3-‘D lea: Dsiétstsfiéiiliéitszurctia. liJ’9¢‘7.t$. §3‘tb (auras) 1» _ i&FfiiCl§§fi'€'3E>lE2‘J<a5%> rteazaaatyrmiaet U1. : m%a»iee>z—ae: s:>asx+r—i: m1rr: stai1maee»zL, , . _ , , , 1. tees/ Arias : t i: .; 0. 7~1;v: srr>rqgi: im; r< V)§FE’<EiU'), atesizrafir; 5 a L~5kE¥‘c‘©”. :; ;:; ‘:3:§, :L: §?‘§%EaTt’“‘” ““°fl‘§’Mm°f’“ E¥7-lc‘fI‘D‘( ‘. "lVV: ‘7L4’! }.h35‘{' vuanusaiiziaw Iilili 3-: i:ifi)§Et': £E5 Ea ~g__' . «znwitamiam _ L“ >90% supported he proposal? » A: iGfi§Z>-7t 3=1="f7|C7J‘l.7. 7'Jl«7:'7lx4§t‘H$T'1Bq :1 ». ‘—6zamA'm>: =ii: zut: : Q: x u -y H37 - A: a‘*; B%*, ic? l¢%7:<lFJ/ ‘7iziblfifilll/ '(L%zt)&lrE§£’(‘駧’. §f: , érmlfliim tarsal Aw rzimriilait maaosazeoirs - %f$ $I’l‘i HHi? %»}§t! é:7.; 'J:3'. Q: §a$fitRi>ta>v>7/Laafiiafihmxez ma : em? aa1i£Itm: s¥e/ mean: A: fiM€7J*1“/7l| /§§El$fi: »f: i‘U. §El¥; '§3»li€§t§§£: fi5tL5§‘E¥’("€. . 35 g Q: E’’T: li'C7‘§%f1*fi7J‘-; '(6¥iE1’Lé: L‘5?)< v -y l~ti’®%70)T'l;7;l. 717 A: i*a§i317i>l3f2“Ri$éh‘(L%.0)‘<’l§53.3320. 1fliT‘$§§‘. = §iaz= anixuza*m: ta&ix<srnrzamrngv: sfiyxomfi Z®¥%¥iEi3§3'éEi§0)§fi, fi?fiE%$E93JOf: LU)'€. L>tT= a)E$t;7/r—l~i: t:‘ls. ’%7J‘F$v. leE%la*”e“ gjzvafigwm §B7S’zU‘3(*5l§lC1z': ii7;‘= fig! -i fllifi F-E11: 2%“ 1t. l§ . t:i0)J:5f. «I1€3l§§§bEi: fiflZ3n§?17‘? - ififi 93 $532 §’‘f: f;%’C‘t: '*‘/ ")l. .)a'Ci bt. :t93]%zl7>’C‘li%§fl$ $I3I fifitcfifi - i£iRL/ T<7;'e, zoxfi mxm: —a$ +. . . W. -
  31. 31. 2011 2012 2013 2014 2015 r Proposed to MEXT vice minister, Funded JFY 2012-2014 Lunch test result - Fukushima city Cs-134 detection limit 4 Cs-137 detection limit Cs-137 detected % °°, local rice 1 Bq/ kg" """" """"" 0 2012/10 2012/12 2013/2 2013/4 2013/6 2013/8 2013/10 2013/12 2014/2 2014/4 2014/6 2014/8 2014/10 2014/12 Year/ Month
  32. 32. Power of the social media — 2 twitter’ connects people
  33. 33. ' J J"! ‘. .' fr _ 1st 'lOlf‘iIl ‘i 1;: ‘cl 1 1.1.1511 .31 7 1 :31 11:2“ val -i g A 61 Al 5 1 a '7‘ 1:1“ : i1m> 5nI1:v41 ‘I g ‘ifil Al :1 a r 1 :4 A at "Ill: WIIFVJ1 ti 2‘ : i Docto s having difficulties with “whole body counting” found me on twitter l f Minamisoma ‘ City Hospital, fall, 2011
  34. 34. Internal Exposure (how much radioactive cesium are Fukushima people eating? )
  35. 35. Average dose of Japanese (before the accident) 6 mSv/ y (2.1 without medical The goal is to limit the EXCESS public dose to 1 mSv/ y 7 00 600 5.00 . *’m 4.00 . O inhalation 3.00 O 1999 , K-40 : 0.2 mSv 2.00 Po-210 : 0.8 mSv 1.00 0.00 mSv/ y
  36. 36. K-40 — about 4,000 Bq in adults’ body —> ~0.2 mSv/ year Half life, 1.3 billion years! 10 B-1 3 my - 89.23/, 0+ 40 20Ca r Whole Body Counter (WBC)
  37. 37. .4‘. I ’ mm ‘ " / ' ' Fukushima c. : , ': -Pop. 290k a" 1 Chernobyl studies, i. e., soil—>food—>people infer: average internal dose of e. g., Fukushima city residents ~ 5 mSv/ y 3-L. ‘ ‘37Cs deposition Bq/ m2 (201 1/1 1/5) 3oooi<<11 1000k-3000k 600k-l0OOk 7 " ’ M1 Cs l37I1)i1'. II iaa/ m-) ‘ “ iii; =i5Eisii: v>ni: inIi / 60k - 100k -332;? 30k - 60k '= °“fa«3°k 10k — 30k ; ;., ;; im-W, ,, ,, ,_ o I 117“ I U2:T<m S 1 ll Pop. 340k 5 “ I 1 V‘- 2.. .
  38. 38. ovo / ' r'ray 9 i C03 1 whole body 3 counter €¥§: §,/ :9 r_ray .
  39. 39. WBC spectra (simulations based on actual data) 1 K I I I |34cs‘I37cs SEES, 100Bq/ body- _ 3‘(’)°:2<1/: °‘; Y_ ~ , ' z . m v y ‘34Cs, ”7Cs <detection limit Below detection limit if 1 COUDTS m _, -_, L 2.. . . . . -. .. ' _ . .g. ' _ ~ -' . .: . . . ---‘E "" ’. -:‘I". s-. I 1/. ‘ . 2-, ' '--. '.". _ '--. -' '__. - . .. . . . 1' . .'. .'- wag -1(1) full) Kllll 1~MIl 1!“) J0! | &|(l 1600 N01) 1-31) 1 I lI34Es: l avcs - iaacsnzvcs _ , ,_ 1000Bq/ body_ l 10000Bq/ body _ W '- _ _ z0.07mSv/ y‘ _< z0.7mSv/ y_ This is already < 0.2 mSv/ y - 1 u - . [.1011 mi me ‘am i: m 14iIl mm imn 4'1‘ WU 500 V10 III! ‘ 1400 WW MW Energy (keV) Energy (keV)
  40. 40. 123456789101112123456789101112 456789101112123456789101112123 my first medical paper No. /1] Fruit. Jpn, A<'ad. . Ser. B 89 (2013) I57 Internal radiocesium contamination of adults and children in Fukushima 7 to 20 months after the Fukushima NPP accident as measured by extensive whole-body-counter surveys By Ryugo S. HAYANO, *‘-i Masal'1a1‘11 TsUBoI<URA. *‘-’ Makoto M1YAzAK1,*" Hideo SATOU, “ Katsumi SATO, ” Shin MAsAKI"‘ and Yu SAKUMA” >lnternal exposure of Fukushima people surprisingly low — much lower than initially feared —much lower than in 1960s (global fallout) —also supported by other recent studies
  41. 41. l37Cs concentration (Bq/ kg) in 2012, N=21785 99% (children 100%) were below the detection limit ~ 0.02 mSv/ y << 40K Frequency All subjects: Mar 2012—Nov 2012 40 n=21785, nnd=21573 (99.0 %) so 20 z1mSv/ y 10 including 1340s l 0 Lu I l I I ll l ll 1 I i 0 1‘ 50 100 150 200 ‘37Cs concentration (Bq/ kg) 10Bq/ kg
  42. 42. 1370s in Japanese adult male, 1959-1994 sou <—J_9.6A ~10Bq/ kg t sm ‘'2 9 A 1 III] 3 7 3 Fl 300 I 3 3 200 mu . "°"ooo0 o. ."o¢ 01955 men 1935 1970 um men uses 193:: I995 £i$(Em (1959-1994) Health Physics 71, 322 (1996)
  43. 43. Why so low’?
  44. 44. this is how the rice bags are measured >107 rice bags (30 kg each) measured every year V 71 exceeded the 100 Bq/ kg limit in 2012 28 in 2013 O in 2014 SHIMADZU Excellence in Science
  45. 45. Fukushima soil, rich in clay (vermiculite) These do not go back to water layered { vermiculite 9 C ‘% These can go t back to water
  46. 46. Soil —> rice transfer factor 1,200 “ 777 7 7 77777 77 11°00 Potassium fertilizer 80° VERY effective : 140 A600 32 3400 A 120 3 E 200 19 E 100 0 E’. 8 80 Potassium in soil : (mg K10/100g) E 9 so . Q E 40 tn 0 0 2,500 5,000 7,500 10,000 12,500 Cs in paddy field soil (sq/ kgowi
  47. 47. Part 4 External Exposure Alli; I*r -< noiuii ll. ¢iJ. 'J| -GU13 [
  48. 48. Personal dosime y results, Percentage so 40 30 20 10 0 I Percentage. 50 40 30 20 10 0 Percemaga so 25 20 15 10 Fukushima 201 1/10—1 2 Fukushima c. 4 5 Nihonmatsu 201 1/9—1 1 Nihonmatsu c. 4 6 Minamisoma 201 1/10—12 Minamisoma c. winter 2011 Date 201 1 /9v201 2/2 Percentage 50 Date C. 40 50 20 10 omSV/ Y 0 1 I 2 4 5 3 I Koriyama 2011/10~11 Percentage. so ' Koriyama C. so 40 :30 20 1 0 mS/ N O‘ 10 2 74 5 a Soma 201 1/1 0~1 2 Percentage 25 Soma c. 20 15 10 5 ‘O mSv/ y O 1 2 4 6 B 1 mSv/ y 10 10 10 2~3 mo. results extrapolated to 1 year msv/ y msv/ Y msv/ y
  49. 49. Fukushima city school children’s external dose —L 03> . _A O O O 100 Log (Frequency) Percentage <1 mSv/ y : 2011 (51%), 2012 (89%), 2013 (93%) 105- 1:0 1.5 2:0 3:0 mSv/ y (Note Log scale) 5.0 7.0 winter 2011 winter 2012 winter 2013 10.0 Data from Fukushima city
  50. 50. Part 5 BABYSCAN story
  51. 51. So, no problem whatsoever? No. Still lots of problems. .. Mothers, in particular, are really worried about their children. And there are lots of problems regarding evacuees, which I do not talk about today
  52. 52. Scientifically, it is sufficient to measure parents but mothers want to have their babies measured
  53. 53. Eating 3 Bq every day 500* . — adult 4001 E — 15 y .3 300: ------ -- - - detection limit of typical wac ----- --: — 10 Y Q , , E 200 _ 5 V 100- e_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ — 3 mo 0 * “BABYSCAN” 0 200 1 400 1 600 800 1000 Days
  54. 54. SO I made “BABYSCAN” 3 units have so far been deployed OPEN ACCESS IOP Publishing I Society for Radiological Protection Journal of Radiological Protection J. Radiol. Prot. 34 (2014) 645-653 d0i:10.1088/0952-4746/34/3/645 BABYSCAN: a whole body counter for small children in Fukushima Ryugo S Hayano', Shunji Yamanakaz, Frazier L Bronson3, Babatunde Oginni3 and Isamu Muramatsu4
  55. 55. “BABYSCAN” — world’s first WBC dedicated for small children HD NHK WORIQT i '* 7 Courtesy, NHK World
  56. 56. BABYSCAN, fully assembled but for the ergonomic cover (NOT a baby—friendly device, yet) 4 la rgg Na’ detectors 6; O f/ ;.o » /7 sh . » e/ q,ng (
  57. 57. BABYSCAN: design is an important element Jab! Designed by Prof. Shunji Yamanaka, U. Tokyo Hayano et al. , BABYSCAN: a whole body counter for small children in Fukushima, J. Radiol. Prot. 34 (2014) 645
  58. 58. >Radioactive cesium NOT detected from any of the ~2000 babies, including the families regularly consuming local food >The importance is in the communication, not (entirely) in the data : 'iTIl’liT> i‘f<; Ii'l'i*%¥‘~ i7i7l5il-‘7ili7‘»1i«. li‘P"l‘-7:i in 30* l 7 *_~’. eS7-. :/ . A7 ; ;.' / "I '7V: 1 , /4-ll , ., . 3 ' “‘~ . get’: i 1 7 X‘ 5'3‘ ' n : :j_’. .;% , ‘ ‘-_ <7 -4 (, (—/ ‘rs , __: ,&_J~ —p . " , « 1 <~<'= :_, Dr. Masaharu Tsubokura, Minamisoma
  59. 59. questionnaire results — parents are still much worried about water, rice, .. . July 2014 — Aug 2014 _ water 60: rice meat fish 40 vegetable 20 T [ i 5 mushroom milk 1 Much Concerned Not much7 gout at all I: Outdoor l concerned concerned concerned Minamisoma
  60. 60. BTW data dissemination by the government — gradually getting better -
  61. 61. Jjcifi ['1‘-' Fisheries agency (now showing graphs) 5.4‘r. i!. w‘i *i¥1'r“ll'Ei‘li = l’~'1 > étflfllflfi > fifififllfifittwfiiiiflififllifihxf 7l<E1h0)Htlfl! E1!I! i§0)fiit: oi. rc~2H 24HE9'r~ (fi2)fifittEi11HE: §~IfiH~7:§mi9‘in-t. vzuwfhwllcmuzz : >s: !<iEt9w>i"5‘! lwtisi'. >&fl'<z= rm. zkiitfix. fl ieicésmr. rjnmsit-5511:. -11121.1!-tr . ‘/7') */ dvrifi Ln: ii’. (l3li)§il(QiJlHfi¥ml§l71f‘iJ§'éHl9i'¥&l)lI§. :1-Ls1‘66.5I Itiltwdcifiviwbizifttthfiafitfio-c 3 3 L f: i=Fi&274r1i H3! Hairs). into n rm. >l¢ia2a4r'4-ismiiii: i: giiIIvzilii: '.5aez1s53% 2 rm-rt > s L M1. >i4ia2274fi1lJwi1‘ix0.3% : ca: FL 5 L r: . lflBHl:3a'| 'l’-SIRE! ) —1°°N/ ‘I5 £! l§tfllt: z7,zs3l§ft —10°3<Il| r¢l; l‘F ioosq/ nfiwmtlx: uuifilt (tilt) -0-fiififii l°0Bql| vx1l‘F0)t§l2t£t: z4.a4sti1t (ii! !!) 3,000 1 100% 2,500 2,000 l§5.096 1, 500 4* . Percentage of fish off the coast I of Fukushima Dal-ichi which 1. I exceeded the 100 Bq/ kg criteria 10(1) 500 i423 H23 uza nu ma nu «:4 M15 M25 runs ms was H26 H26 nae M27 ufi ME 10125 1-ail uifi 7-sfi mufi L315] 4-efi 7-sfi mufi 1-alil ¢6Fl 1-9}? 101211 111
  62. 62. Fukushima prefecture portal is now multilingual (machine translation) This page is uanslated using machine translation. Please note i. ha the content may not be 100% accurate. , - Japanese English L7] Zhongwen (.31 character) L lzhongwen (han'ji) Co: 55101 l—' Deutsch I jfrancais Espana Portugal at 1 l= :;- E Q mun. .- w uQ. — —j: ' 7-, 1: - Re. this site 1 r'$1<b§§§X7_'-‘‘/ é7 ‘ , ' 7 7 _I. Reiated iglata . Ellflm-911/9‘fl~ . C J}/ F1 . — 1 D 61 9 ‘-8 A 09 at » Situation of Radiation Ex Status of Life and health Radiological Infrastructure Agriculture, Commerce and New industries Fukushima TEFCO Decontamination evacuation of citizens inspections: restoration, forestry and Industry, Supporters Fukushima zonesl Support Water 8. Food maintenance fisheries Tourism Daiichi NPS for sufferers indust Situation of TEPCO Radiation 8: Status of evacuation Fukushima Daiichi NPS Decontamination zones/ Support for sufferers
  63. 63. |Real time and oliokable radiation monitor map » l‘EEL%fi5l§= .lia"é3RllE? “J7° Fukushima prefecture radioactivity measurement map ffiiflflfihlfilldliflé. rli—A’‘—‘/ 'EiKD ‘Z074 t~®J»h‘7:i E«’fE"'3 L]? < f: ' 3 L‘: . ,.i uiimiuma ENE 'l n. .li H‘ Y’? ll~(i<i‘ i’ il l . m-» Ritltafi xeiwwi Lilsiilct ‘: i“<'P1t'; fi xemau Dismn , r , m— v: U7'74 HDSMJW: »a. =a. —m—Lm— Pr‘ I, %(Dl! l.‘®_ .1‘: lJ"i&l; L‘. ‘:fi1l! E gems lfiiiiflfi LO31l! E i<e-man msmcz Ami Dank! Sow Dislvid lwalii Dislnct HM ~' m ; .il'II‘i'. lU''JSlil‘. / ‘i lUljHiGi Vania EEEER Select Lanflulfi Aiiuwzmiriiiii-. u oiawag 7cE£ir. a ? .IiJIi. lliy. i 7 T Koriyama i, i»uiii. i : i.l l seemrma37v7 Qi
  64. 64. searohable rioe—test database with a graph (since 2012) Inspection information 2014 Fukushima Association for Securing Safety of Agricultural _ W Products l Search for 2013 l Radioactive Material Inspection ia, —c, —,, ,—o, —2—(, —,—2—‘ Information a Brown Rice produced in the prefecture must go through "the inspection of all rice in all rice bags”. The inspection confirms the radioactive material level of rice for shipment ls below the reference value (1 00Bqlkg)for general food stipulated in the “Food Hygiene law". Search result 2014 Summary 2014 whole Fukushima Pref. (city) items10,9El9,452 items Area: 3 whole Fukushima Pref. (city) H M W _; inspection Period : 08/21/2014~02/24/2015 “ °““'°”“ 7 items : 10,939,452 items Search condition 2014 seiectarea : whole Fukushima Pref. (region) [25 :5 Sf 5‘! 75 76 me ‘why whole Fukushima Pref. (city) » < Screening Inspection > Select date 2 whole period - “"°"Bq, , 925 75'‘'5° “"75 7°~‘°° total items io,9s7.5oq was 11 1 io.939.42si percentage 99.95-xii am 9i, o. oom on, 000001 95, ioosq ii Search l
  65. 65. Conclusions
  66. 66. Despite soil contamination, i l L. ... ... ... .._. _.. ._. m i the internal exposure of Fukushima people is negligibly low BUT -. -.. -saa. -s. au-mun-. .c. .«. a.. s-. a-. a-gauc- Parents with small children are much Concerned about internal exposure - necessity of the BQEYSCAN * . m.. o.~. q-s. u-. a.. —.. i.a. ... --_ai«
  67. 67. moo. -u-ea-3 {BABYSCAN is also a communication tool — takes time & efforts to regain the trust of people 3 Radiation is NOT the only problem — K psycho-social (and money) aspects are my important T T T
  68. 68. take-home message again weMr. ... w.u-mm»mmm«mm-uwuagwmwm-»m. «~»-a. wu. mJwawwww_w¢¢». .mamm«-9u«i-«. m.«<. -nu. -u.4.—~ s-, -u. .«-; t.s«. q.. «.. ..-t. .~. ... —.. ,«. .«. ... ... . Fukushima Dai—ichi, serious accident i However, No death due to ACUTE radiation effects DISCERNIBLE long—term health effects (e. g., cancer increase, incl. thyroid) unlikely source — WHO, UNSCEAR, IAEA Dealing with psycho-social problems has become increasingly more important . . «mo. —. e-. e.. .»ao. a-. ».u«~¢ ni¥~s: whu«-mnJH~¢~soavu<! hrAn§e~a44~r¢-s. mde¢~a. n%ar-imniav ». mmos«a. m»p»ma: u.«, n~m»«. a~—m«eo-»a»««awmv«. m~«—». »xe.2u¢a I

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