The scandalous deficiency of the health scheme in Fukushima

Taro Yamamoto of the Liberal Party, member of the House of Councilors, accused the double standard of the the public radioprotection policy during his questions at the Special Commission of Reconstruction of the House of Deputies on March 21, 2017. He compared the health examination scheme introduced by Ibaraki prefecture to its population after the JCO* criticality accident to that currently available to Fukushima residents. The result shows the utter deficiency of the latter in spite of the fact that the Fukushima accident is classified as level 7, much more severe than the JCO level 4 accident.


We are publishing here the transcription of Taro Yamamoto’s questions** as well as the soil contamination map of Kashima and Haramachi districts of Minamisoma where the evacuation order was lifted in July 2016. The map is provided by the civil measurement group called “Fukuichi*** Area Environmental Radiation Monitoring Project”**** composed mainly of residents of Minamisoma which has been taking measurements of soil contamination in the vicinity of the members’ neighborhoods and in residential areas since 2012. Taro Yamamoto has already used their maps during another session of the Special Commission of Reconstruction. Let us note that in the map uploaded here, there are only two rectangles where the contamination density is lower than 40,000Bq/m2, and that for the rest of Kashima and Haramachi districts, the density is amazingly higher. As Taro Yamamoto indicated during his questions on November 18 last year, according to the Ordinance on Prevention of Ionizing Radiation Hazards a zone is called a Radiation Control Zone when the surface density is over 40,000Bq/m2. In a Radiation Control Zone, following the Ordinance, it is prohibited to drink, eat or stay overnight. Even adults are not allowed to stay more than 10 hours. To leave the zone, one has to go through a strict screening. The map shows that most of the two districts of Minamisoma city are in this situation. But it is not classified as Radiation Control Zone. On the contrary, people are told to go back there to live, including children.

ここで、山本太郎議員の質問の文字起こし**とともに、「ふくいち***周辺環境放射線モニタリングプロジェクト****」の作成した、南相馬市、鹿島区、原町区の土壌汚染地図をアップいたします。このグループは南相馬にお住まいの住民の方々を中心に、2012年からそれぞれの近所、生活圏の土壌汚染などの計測を続けるグループで、以前にも山本太郎議員が2016年11月18日の復興委員会での質問で当グループ作成の地図を資料として使っています。この時の質問で山本議員が指摘したように、電離放射線障害防止規則により、放射性物質の表面密度が40000Bq/m2以上の区域は放射線管理区域と呼びます放射線管理区域では 飲食は禁止、当然寝泊まりはできません。成人でも10時間以上の滞在は許されません。そこから出るときは厳格なスクリーニングを受けなければなりません。地図を見ると、40,000ベクレルよりも低く測定されたところは2箇所にすぎず、他の地域では放射線管理区域の下限をはるかに超える汚染を示しています。しかし、この区域は放射線管理区域に指定されていません。それどころか、このような区域の避難指示がすでに解除され、子供も含む住民の帰還が進められています。


Measurement devices : scintillation radiometers
Hitachi Aloka TCS172B
Dose rate of airborn radiation at 1 m, 50 cm, 1 cm from the ground. Unit : µSv/h
Hitachi Aloka TGS146B
Calculation of the rate of surface contamination, 1 cm from the ground. Unit : cpm
Procedure for measuring soil samples

Ram a tube in the ground (diam. : 80 mm, h : 50 mm), collect the soil and measure.
For TCS172B/TGS146B, wait for stabilisation, measure 5 times,then take the average value.
Insert ★ where the soil was collected.
Analysis device:

Canberra NaI Scintillation Detector (10 or 20 min)
According to the Ordinance on Prevention of Ionizing Radiation Hazards and Industrial Safety and Health Law, places where the effective dose reaches 1.3mSv in 3 months (approximately 0.6µSv/h of airborne radioactivity) or 40,000Bq/m2, in terms contamination density, are designated as a ‘’Radiation Control Zone’’ and public entry must be severely restricted.

測定器 :
日立アロカTCS172B (空間線量率1m,50cm, 1cm 高 単位µSv/h)
日立アロカ TGS146B (表面汚染計数率 1cm高 単位cmp)
土壌採取時の測定 :
分析器:キャンベラ社NaI分析器(10分or 20分)
「放射線障害防止法」「労働安全衛生法」などの法令によれば、実効線量で3か月1.3mSv (空間線量率で約0.6µSv/h)または、汚染密度で40,000Bq/m2以上になる恐れのある場所は「放射線管理区域」に指定し、一般人の立ち入りを厳しく制限しなくてはならない。


Transcription of the questions of Taro Yamamoto

山本太郎議員質問書き起こし Continue reading “The scandalous deficiency of the health scheme in Fukushima”