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Radiation Readings at Narita International Airport

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[As of Sep 2, 2014 19:00JST]

Radiation Readings

Sampling Points Measured Dose Calculated Annual Exposure
A 0.039μSv/h 0.342 mSv/y
B 0.056μSv/h 0.491 mSv/y
Unit * Sievert (Sv) is a unit for measuring the effects of radiation on a person.
1000 micro sievert (Sv) = 1 milli sievert (mSv)
Reference Examples from "Radiation in Daily Life" as publicized by the Ministry of Education, Culture, Sports, Science and Technology of Japan.
* Single chest X-ray examination
* A round trip between Tokyo and New York by plane
* Single abdominal X-ray examination
0.05 mSv
0.2 mSv
0.6 mSv

According to the World Health Organization (WHO), a person is exposed to an annual average of 3.0mSv of radiation in a normal daily life.
*Readings from sampling points may occasionally not be available due to inspection of monitoring devices and other reasons. In that event, a dash (-) will appear in the Measured Dose and Calculated Annual Exposure columns.
Monitoring Device: Fuji Electric Systems Co., Ltd., fixed monitoring post
Location of Device: Location A NAA Telecommunication Center (5 stories high) roof top, north end (25.3 m from ground level)
Location B On the grass verge at the south end of Runway B (at a height of 1 meter)

NOTICE
Radiation readings at Narita Airport commenced on 29 March 2011.
The Japan Chemical Analysis Center (http://www.jcac.or.jp/), an organizations dedicated to the analysis of environmental radiation and radioactivity, has certified the reliability of the sampling equipment, the accuracy of its readings and the installation of the equipment.
A new sampling point (Location B on the grass verge at the south end of Runway B) began operating on 27 March 2013.
Readings from sampling points may occasionally not be available due to inspection of monitoring devices and other reasons. In that event, a dash (-) will appear in the Measured Dose and Calculated Annual Exposure columns.

[Historical Data]Location A
Date & Time Measured Dose Calculated Annual Exposure
19:00JST Sep 2 0.039μSv/h 0.342 mSv/y
10:00JST Sep 2 0.040μSv/h 0.350 mSv/y
19:00JST Sep 1 0.039μSv/h 0.342 mSv/y
10:00JST Sep 1 0.043μSv/h 0.377 mSv/y
19:00JST Aug 31 0.039μSv/h 0.342 mSv/y
10:00JST Aug 31 0.040μSv/h 0.350 mSv/y




[Historical Data]Location B
Date & Time Measured Dose Calculated Annual Exposure
19:00JST Sep 2 0.056μSv/h 0.491 mSv/y
10:00JST Sep 2 0.056μSv/h 0.491 mSv/y
19:00JST Sep 1 0.055μSv/h 0.482 mSv/y
10:00JST Sep 1 0.060μSv/h 0.526 mSv/y
19:00JST Aug 31 0.055μSv/h 0.482 mSv/y
10:00JST Aug 31 0.057μSv/h 0.499 mSv/y


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