The correspondence situation to security, radiation of reliable disaster prevention, evacuation site Kawaguchi City to look for in field sent back to the top

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(August 16, 2017 update)

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.

"It is radiation something? We will think about ... radiation! ... (publish decontamination, storage method of making (radioactive material in (3178KB) June, 2012.

We make in  radiological decontamination manual (464KB) November, 2011

Guidelines on decontamination (second) to affect measures (explanatory note) source point Ministry of the Environment (4820KB)

Measuring equipment

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.

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Inquiry

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)

e-mail: 050.05000@city.kawaguchi.lg.jp

 

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