CONSULTING
20160713MSC-WNISR2016V2-LR
20160713MSC-WNISR2016V2-LR
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(Full-scale Thyroid Screening Program)”, 15 February 2016.<br />
As of the end of December 2015, 51 people were diagnosed with confirmed or suspected malignant<br />
thyroid cancer in the second examination. Unfortunately, only 29 of them submitted a basic survey<br />
questionnaire that provides data on their exposure dose at the time of the accident. Among these<br />
values, the highest dose was 2.1 mSv (see Table 8). 301<br />
In October 2015, a research group at Okayama University published an epidemiological study<br />
related to the high occurrence of childhood thyroid cancer. 302 According to the group, based on the<br />
results of the screening tests of Fukushima Prefecture, at the maximum, the incidence of thyroid<br />
cancer in a certain area of Fukushima Prefecture was up to 50 times higher than Japan's average<br />
annual incidence of thyroid cancer incidences. Accordingly, the group concluded that the excessive<br />
occurrence of thyroid cancer has already been detected. However, the methodology of this paper<br />
has been criticized and the academic debate on this issue is continuing. 303<br />
Food and Environmental Contamination<br />
The intake and shipment of certain edible wild plants and freshwater fish have been restricted due<br />
to the contamination risk. 304 Although fishermen have placed a voluntary restriction on fishing in<br />
the waters within 20 km from the Fukushima power plant site, a study is being conducted that<br />
hopes to restart fishing in that area.<br />
Most food samples analyzed for radioactive contamination were non-contaminated or<br />
contaminated at levels “below the detection limit”, except for rare cases in prefectures adjacent to<br />
Fukushima. For example, 263 cases (0.09 percent) exceeded the standard limits in the monitoring<br />
from April 2015 to January 2016. 305<br />
It should be noted that regarding the term “Not Detected (ND)”, which has been frequently used in<br />
government reports, a recent study proposes a review of the detection limit. 306<br />
The Ministry of the Environment has continued to monitor wild animals and plants. For example,<br />
at a scientific meeting held in February 2016, a study conducted in FY2014 was presented that<br />
evaluated the exposure-dose rates of about 40 types of animals and plants. According to this study,<br />
301 Prefectural Oversight Committee Meeting for Fukushima Health Management Survey, “Thyroid<br />
Ultrasound Examination (Full-scale Thyroid Screening Program)”, 15 February 2016, see http://fmuglobal.jp/?wpdmdl=1563,<br />
accessed 10 June 2016.<br />
302 Tsuda, Toshihide et al., “Thyroid Cancer Detection by Ultrasound Among Residents Ages 18 Years and<br />
Younger in Fukushima, Japan: 2011 to 2014”, Epidemiology, Volume 27, Issue 3, May 2016, see<br />
http://journals.lww.com/epidem/Citation/2016/05000/Thyroid_Cancer_Detection_by_Ultrasound_Among.3.aspx,<br />
accessed 12 April 2016.<br />
303 Takahashi, Hideto et al., “Re: Thyroid Cancer Among Young People in Fukushima”, Epidemiology,<br />
Volume 27, Issue 3, May 2016, see<br />
http://journals.lww.com/epidem/Fulltext/2016/05000/Re___Thyroid_Cancer_Among_Young_People_in.36.aspx,<br />
accessed 12 April 2016.<br />
304 Fukushima Prefecture, “Results of emergency environmental radiation monitoring of agriculture, forestry<br />
and fishery products”, (in Japanese), see http://www.pref.fukushima.lg.jp/site/portal/mon-kekka.html, accessed<br />
12 April 2016.<br />
305 Food Industry Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries<br />
(MAFF), “Ensuring food safety”, March 2016, see<br />
http://www.maff.go.jp/j/export/e_info/pdf/160401_eigo_part1.pdf, accessed 10 June 2016.<br />
306 Hiroshi Okamura et al., “Risk assessment of radioisotope contamination for aquatic living resources in<br />
and around Japan”, Proceeding of the National Academy of Science of the United States of America,<br />
Volume 113, see http://www.pnas.org/content/113/14/3838.abstract, accessed 12 April 2016.<br />
Mycle Schneider, Antony Froggatt et al. 96 World Nuclear Industry Status Report 2016