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Radiation Readings at Narita International Airport

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[As of May 23, 2013 10:00JST]

Radiation Readings

 Sampling Points Measured Dose Calculated Annual Exposure
A 0.046μSv/h 0.403 mSv/y
B 0.067μSv/h 0.587 mSv/y
Unit * Sievert (Sv) is a unit for measuring the effects of radiation on a person.
1000 micro sievert (ƒÊSv) = 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.
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.

[Historical Data]Location A
Date & Time Measured Dose Calculated Annual Exposure
10:00JST May 23 0.046μSv/h 0.403 mSv/y
19:00JST May 22 0.044μSv/h 0.385 mSv/y
10:00JST May 22 0.046μSv/h 0.403 mSv/y
19:00JST May 21 0.045μSv/h 0.394 mSv/y
10:00JST May 21 0.046μSv/h 0.403 mSv/y
19:00JST May 20 0.046μSv/h 0.403 mSv/y




[Historical Data]Location B
Date & Time Measured Dose Calculated Annual Exposure
10:00JST May 23 0.067μSv/h 0.587 mSv/y
19:00JST May 22 0.066μSv/h 0.578 mSv/y
10:00JST May 22 0.066μSv/h 0.578 mSv/y
19:00JST May 21 0.065μSv/h 0.569 mSv/y
10:00JST May 21 0.066μSv/h 0.578 mSv/y
19:00JST May 20 0.065μSv/h 0.569 mSv/y


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