Ryu Hayano hayano Professor of Physics, The University of Tokyo Internal contamination of Fukushima citizens - What we have learned from the recent whole body counter measurements -
1. Internal contamination of Fukushima citizens - What we have
learned from the recent whole body counter measurements -Ryu
HayanoProfessor of Physics, The University of Tokyohayano
2. My research at CERNantimatterpurely fundamental no practical
usenot this 3. March 11, 2011, Tokyo University 4. March 12 14:22
hayanoMy rst Fukushima tweetCs137662 keVCs137Sr90 5. TEPCO
dataVisualization 6. 07:49hayano(http://bit.ly/engea6) The rst
Fukushima-Daiichi graph 7. Radioactive plume detected withIbaraki
monitoring post, March 15, 8. 2500 (before the quake) 150,000
followers 9. Q: ~100% of radioactivecesium has already beenreleased
from NPP (T or F) 10. F 11. Cesium release from Fukushima
Daiichi137Cs (Bq)Total (before the accident)70 x 1016 3
reactorsRelease to atmosphere1 2 x 1016Release to ocean0.4 x
1016Release fractionabout 3% 12. Q: Radiation in downtownTokyo has
returned to thepre-3.11 level 13. F 14. Radiation level in TokyoNot
quite - yet 15. Radiation level in Chiba (near Tokyo) Sv/hdose rate
~ 0.1 Sv/h 1.040% is due to Cs-134Radiation level 20% is due to
Cs-137 40% is due to natural backround
0.1Cs-134Cs-1370.01precipitation 2011/3 4 567 8 910 1112 2012/1 2
345yr/mohttp://www.jcac.or.jp/lib/senryo_lib/nodo.pdf 16. is
abi-directional media 17. soil contamination mapand various
monitoringresults have becomeavailable -butwhat about
foodsafety?what are kids eating?5 18. So, I proposed to
measureschool lunch 19. This is in JFY12 budget 2011/9/21 20.
2,000First school lunch measurement in YokosukaOct 2011~Bq/kg kg
131 134 137(Sv) 2414 4.713315 00.072 0.600.610.67 2427
3.0093300.057 0.530.820.76 242024 3.263225 00.053 0.480.740.58
241317 3.085218 00.053 0.590.760.65 2410 3.004211 00.036
0.530.440.57 2430 2.7592400.041 0.560.630.59 242327 2.949128 00.043
0.550.610.59 241620 3.128121 00.056 0.580.720.79 241013 2.622114
00.035 0.560.570.55 24101428.532 00.446 47
231013122229.8230.0120.417 49 96 58.3550.0120.863Yokosuka school
lunch is completely Cs free134137134137 21. Yokosuka lunch is
OK.What about Fukushima? 22. My proposal to the mayor of Minamisoma
city, 20 km north of Fukushima Daiichi2004.2.12+UNIVERSITY OF
TOKYOSCHOOL OF SCIENCE, DEPARTMENT OF PHYSICS7-3-1 HONGO,
BUNKYO-KU, TOKYO 113-0033, JAPANProfessor Ryugo S. HayanoTELEPHONE:
+81-3-5841-4235 TELEFAX: +81-3-4496-4043 e-mail:
[email protected]://nucl.phys.s.u-tokyo.ac.jp/hayano20111028FAX
0244-24-5214 23. Q: Fukushima milk issafe to drink 24. T 25.
Minamisoma school lunch measurement started inJan 2012. Cesium not
yet detected. 3/26/12 9:52 AMEnglish Chinese Korea HOME 24322 2,000
15 Bq/Kg) Kg Sv 13113413724 312 316 4.00 31900.061(5)
