Recently the NHK News reported the following:
今月初め、東京・世田谷区の区道で１時間当たり最大で２．７マイクロシーベルトという高い放射線量が検出され、世田谷区は、この場所に立ち入らないよう呼びかけるとともに今後の除染を検討しています。
高い放射線量が検出されたのは、世田谷区弦巻の区道の歩道の長さおよそ１０メートル、幅およそ１メートルの部分です。世田谷区によりますと、今月３日、区民から「放射線量が高い場所がある」という情報が寄せられたため、区が測定したところ、１時間当たり最大でおよそ２．８マイクロシーベルトと周辺に比べて特に高い放射線が検出されたということです。このため高圧の洗浄器を使って歩道部分の洗浄を行いましたが、放射線量はあまり下がらず、１時間当たり最大で２．７０７マイクロシーベルトが検出されたということです。原因について世田谷区が専門家に聞いたところ、問題の場所は雨水が集まって放射線量が高くなったことが考えられるということです。ただ、今回の測定では地表より高い場所でより高い数値が出るなど、通常あまり見られない結果が出ていることから、世田谷区では原因を詳しく調べることにしています。この区道は小学校の通学路にもなっていることから、区は、１２日朝からこの場所をコーンで囲って立ち入らないよう呼びかけるとともに今後の除染を検討しています。世田谷区は、ことし７月から８月にかけて区内の小中学校や保育園、それに幼稚園で放射線量を測定しており、その際、高い放射線量は検出されていませんでした。世田谷区は、子どもへの影響を重視し、今月下旬から区内の砂場がある２５８か所の公園について調査することにしています。世田谷区環境総合対策室の斉藤洋子室長は「現場は小学校の通学路で、近くには幼稚園や保育園もある。心配する保護者の方がいると思うので、専門家とも相談してできるだけ速やかに除染などの対応をとりたい」と話していました。
(試譯文)
At the beginning of this month, radiation with a dosage as high as up to 2.7-micro sievert per hour was detected at the district roads of Setagaya-district, Tokyo; and while considering future decontamination, appeal was made to stop coming into this location.
It was a portion about 10 meters in length of the sidewalk of district roads of Tsurumaki, Setagaya-district, and it was about 1 meter in width that a high dose of radiation was detected. According to Setagaya-district on the 3rd of this month, information was received from the district residents that "there is a place where the radiation dosage is high", when the district measured it, the high radiation detected was as high as around 2.8-micro sievert per hour and was particularly higher than the surrounding. Although the sidewalk portion was washed using the high-pressure syringe, the dose of radiation barely fell and was as high as 2.707-micro sievert per hour. When Setagaya-district asked a specialist about the cause, it was considered that the place in question had rain water gathered and the dosage of radiation became high. However, as the numerical value measurement came out higher at a place, and higher than surface of the earth etc.; as a rarely seen result had come out, it was said that Setagaya-district would investigate the cause in details. Since this district road was also a school zone of the elementary school, while the district was considering future decontamination, it appealed to enclose this place with cones and denied entry starting from the morning of the 12th.
Setagaya-district had measured the dosage of radiation from July to August this year from the kindergarten to the elementary and junior high schools, and nursery school in the district; at that time a high dose of radiation was not detected. Setagaya-district thought that its influence on children was important, so from the end of this month it would carry out investigation on 258 parks in the district which had a sandy ground. Section Head Yoko Saito of the Setagaya-district environmental comprehensive policy section said that "the spot is a school zone of an elementary school, and nearby there is also a kindergarten and a nursery school. In view of the worrying parents, I would like to consult as soon as possible with a specialist and to action to respond to decontamination etc.
(to be continued)
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