Comment on Draft Report of Task Group 93
Iryo Mondai Kenkyukai
Keiji Hayashi, Kuniyoshi Mori, Machiko Izyuin,
Norio Irie, Hidehiko Yamamoto, Tadahito Umeda, Isamu Takamatsu
We describe our opinion against the following parts of this revision.
‘6.conclusion Table 6.1
Existing exposure situation Public <= 10mSv per year’¡¡
‘The long-term goal is to reduce exposures to the order of 1mSv per year’
'The order of 1mSv / year' is incorrect. That should clearly be described as "minimal exposure dose under 1mSv".
In particular, it should be clearly described that expectant and nursing mothers and children need limitations on exposure dose strictly.
The recommendation to ignore the latest scientific research and allow excessive radiation hostile to health including genetic disorders.
The reason for this opinion are as follows.
We investigated the effects of exposure dose on the fetus after the Fukushima accident.
One result showed that perinatal mortality increased in jumping OR = 1.188 (95% CI 1.085 - 1.301) (increased about 19 %) in six neighboring prefectures, including Fukushima Prefecture, this increasing continued until 2017. Moreover, the increasing in perinatal deaths increased jump OR = 1.106 (95% CI 1.035 - 1.183) (increased about 11%) in the Tokyo, Saitama, and Chiba areas.1),2)
These results indicate the serious situation that the Fukushima nuclear accident affected the fetus.
Recent reports of an increasing in severe cardiac malformations 3) and an increase in Cryptorchidism ( un-descending testes) 4) in Japan after the Fukushima nuclear accident provide support for an increasing perinatal death.
In addition, an increase in perinatal death5), stillbirth6) and Trisomy- 217) malformations8) have been
reported after the Chernobyl accident,.
According to these studies, it is estimated that the genes are damaged by exposure to 1mSv or less dose.
There are many reports of human damages caused by low-dose exposure in recent years beyond these facts. Some of them are shown below. If these studies are considered, this recommendation should not be issued.
Many reports on the Chernobyl accident 9), 10) has appeared.
There are reports on the human damages of medical radiation exposure including large-scale reports. 11) -19)
There are also reports on nuclear facilities 20), 21), and natural background radiation.22)
There is a very detailed review of previous studies reporting the genetic effects of low-dose exposure. 23)
As is well known, LSS of exposed people in Hiroshima and Nagasaki also has proven that there is no threshold for radiation damage. 24) 25)
< reference >
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3) Murase K, Murase J, Mishima A, et al. Nationwide Increase in Complex Congenital Heart Diseases After the Fukushima Nuclear Accident. J Am Heart Assoc. 2019 Mar 19;8(6):e009486.
4) Murase K, Murase J, Machidori K, et al. Nationwide Increase in Cryptorchidism After the Fukushima Nuclear Accident. 2018 Aug;118:65-70. doi: 10.1016/j.urology.2018.04.033.¡Ë
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