CONSULTING
20160713MSC-WNISR2016V2-LR
20160713MSC-WNISR2016V2-LR
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However, the average thyroid dose in Belarus and Ukraine was about 20 times greater than in<br />
Fukushima prefecture. This is because the I-131 release was about 10 to 12 times greater at<br />
Chernobyl than Fukushima and because an estimated (~80 percent) of the plumes at Fukushima<br />
were blown out to sea. 331<br />
Table 12: Average Doses in Fukushima and Chernobyl (Highest Contaminated Areas)<br />
Fukushima<br />
Prefecture<br />
Highly Contaminated Areas of<br />
Belarus, Russia and Ukraine<br />
Europe / Japan<br />
Average Dose 10 mSv 9 mSv ~1<br />
Average<br />
Thyroid Dose<br />
35 mGy 332<br />
560 333 -640 334 mGy<br />
(range 50 to 5,000 mGy)<br />
16 - 18 x<br />
Source: UNSCEAR 2008, 2013<br />
As regards collective dose, the UNSCEAR 2013 report states:<br />
The collective effective dose to the population of Japan due to a lifetime exposure following the<br />
Fukushima accident is approximately 10-15 percent of the corresponding value for European<br />
populations exposed to radiation following the Chernobyl accident. Correspondingly, the collective<br />
absorbed dose to the thyroid was approximately 5 percent of that due to the Chernobyl accident.<br />
This is shown in tabular form in Table 13.<br />
Table 13 : Collective Doses from Fukushima and Chernobyl Accidents (over 80 years)<br />
Europe<br />
Japan<br />
Factor<br />
Difference<br />
Collective Dose<br />
320,000-480,000<br />
Person-Sv<br />
48,000 Person-Sv x 7-10<br />
Collective Dose to<br />
Thyroid<br />
2,240,000 Person-Gy 112,000 Person-Gy x 20<br />
Source: UNSCEAR 2008, 2013<br />
331 UNSCEAR, “UNSCEAR 2013 Report — Volume I, Report to the General Assembly ; Scientific Annex A:<br />
Levels and effects of radiation exposure due to the nuclear accident after 2011 great east-Japan earthquake<br />
and tsunami”, United Nations, April 2014, see http://www.unscear.org/docs/reports/2013/13-<br />
85418_Report_2013_Annex_A.pdf, accessed 5 June 2016.<br />
332 Le Gray is a unit of collective dose for specific organ exposures.<br />
333 Zablotska L.B., Ron E., et al., “Thyroid cancer risk in Belarus among children and adolescents exposed to<br />
radioiodine after the Chornobyl accident”, British Journal of Cancer, 2011, Edition n.104, published online<br />
23 November 2010, see http://www.nature.com/bjc/journal/v104/n1/full/6605967a.html, accessed 5 June 2016.<br />
334 Likhtarov I., Kovgan L., et al., “Thyroid cancer study among Ukrainian children exposed to radiation after<br />
the Chornobyl accident: Improved estimates of the thyroid doses to the cohort members”, Health Phys.,<br />
March 2014, see http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4160663/, accessed 5 June 2016.<br />
Mycle Schneider, Antony Froggatt et al. 102 World Nuclear Industry Status Report 2016