The correspondence situation to radiation of Kawaguchi City
We will tell about correspondence guidelines of radiation dose by Tokyo Electric Power The Fukushima Daiichi nuclear disaster accompanied with the Great East Japan Earthquake.
Provisional target value of Kawaguchi City
Annual radiation doses are less than 1mSv.
※International Commission on Radiological Protection (ICRP) assumes natural radiation and space radiation dose except medical exposure 1mSv a year.
Decontamination standard of Kawaguchi City
About number "0.23μSv an hour" to be based on
In Kawaguchi City, we set standard of radiation dose per one hour of 0.23μSv. This increased radiation dose 0.04μSv from the earth of the natural world to reduced value 0.19μSv at time of radiation dose except natural radiation.
We carry out decontamination work as a result of measurement immediately about point beyond 0.23μSv/h and plan reduction of radiation dose.
We make in radiological decontamination manual (464KB) November, 2011
PA-1000 "Radi" made by Horiba, Ltd.
TCS-172B made in Hitachi Aloka Medical
Result of a measurement
Result of a measurement (page opens) such as each city facility
Correspondence policy to point that the measurement of radiation and dose of radioactivity are high in
Measurement policy of 1 space radiation dose
１． The fixed point measurement
In city, we perform the atmospheric radiation dose measurement in ten places of cities. From 2016, we carry out the measurement on first Tuesday in even month.
２． The patrol measurement of city facility
We go around about school grounds, garden, sandboxes such as kindergarten, elementary and junior high school, nursery school, park and measure to grasp influence accompanied with change of the direction of the wind.
Criterion to be high in 2 radiation doses
１． We assume reduced value 0.23μSv the standard value every hour. (1mSv a year and total number of natural radiation dose from the earth that country showed)
２． Criterion that exceeded the standard value for aspect
When when central 5 centimeters of surface of the earth, 50 centimeters of school grounds, garden, one of the first measurements with 100 centimeters exceed the standard value, we measure again in 5 centimeters of surface of the earth of the site neighborhood and plural number point on diagonal, and results exceed the standard value for aspect.
Disaster Prevention Section radiation measures charge [Hatogaya Government building 4F]
Hatogaya Government building address: 1-14-3, Mitsuwa, Kawaguchi-shi
※It is ⇒〒 332-8601 2-1-1, Aoki, Kawaguchi-shi on mail
TEL 048-242-6359 FAX 048-281-5765
Call time: From 8:30 to 17:15 (except Saturday, Sundays and holidays, holiday, the year-end and New Year holidays)
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