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Environmental radioactivity findings (as of September 13, 2017 16:00) in the prefecture pertaining to nuclear test conduct of North Korea

The last update date:
 We receive information that nuclear test was carried out in North Korea on September 3, 2017 and we strengthen environment radioactivity Surveys which we usually carry out in Saga and investigate.

 Abnormality was not recognized about space emission dose rate in the prefecture and radioactivity concentration out of environmental sample today as of 16:00 on September 13.

  In addition, we decided to return the monitoring system which we strengthened at 15:00 on September 12 to the normal monitoring system because we heard to shift from atomic energy regulation agency to the normal monitoring system. In addition, we will tell when abnormality is seen in findings in future each time.

 

1 Surveys item and Surveys point


(1) Space emission dose rate

  Saga-shi, Tosu-shi, Taku-shi, Takeo-shi, Ureshino-shi, Imari-shi (three),

  Karatsu-shi (20), Genkai-cho (four) 32 places (monitoring post of all the prefecture) in total 


(2) Radioactivity concentration out of environmental sample

  The atmosphere airborne dust: Saga-shi (one)

  Descent thing, rainfall: Saga-shi (one)

※Space emission dose rate is strength of radiation of space.

※Radioactivity concentration is quantity of radioactive material. 

※The atmosphere airborne dust is small dust floating in the atmosphere.

※Descent thing, rainfall is Chile dropping naturally and rain.

 

2 findings (preliminary figure)

Space emission dose rate

   Space emission dose rate was within the normal level as of 16:00 on September 13, and abnormality was not recognized.

 Rise is seen in number of air dose dose rate, but as natural radioactive material descended under the influence of the rain on the surface of the earth, this is because radiation dose rose.

 At the time of rise, we confirm that there is not influence by descent of artificial radioactive material. 

 

 In addition, result of a measurement of each Surveys point is released in the homepage in real time.

 Address: http://www.saga-atom.jp/pc/index.html We open with the other window(external link)

        http://radioactivity.nsr.go.jp/map/ja/ We open with the other window(external link)

  

Radioactivity concentration (the atmosphere airborne dust) Saga-shi (one) out of environmental sample

 

Collection period

Iodine -131

(mBq/ cube meter)

Cesium -137

(mBq/ cube meter)

September 12 9:00 - September 13 9:00

The non-detection

The non-detection

September 11 9:00 - September 12 9:00 

The non-detection

The non-detection

September 10 9:00 - September 11 9:00 

The non-detection

The non-detection

September 9 9:00 - September 10 9:00 

The non-detection

The non-detection

September 8 9:00 - September 9 9:00

The non-detection

The non-detection

September 7 9:00 - September 8 9:00

 The non-detection 

 The non-detection 

September 6 9:00 - September 7 9:00 

The non-detection

The non-detection

September 5 9:00 - September 6 9:00 

The non-detection

The non-detection

September 4 9:00 - September 5 9:00

The non-detection

The non-detection

September 3 13:10 - September 4 9:00

The non-detection

The non-detection

 

 We are not detected about artificial radioactive nuclide except the above either.

 

Radioactivity concentration (descent thing, rainfall) Saga-shi (one) out of environmental sample

 

Collection period

Iodine -131

(MBq/ square kilometer)

Cesium -137

(MBq/ square kilometer)

September 11 15:00 - September 12 15:00 

The non-detection

The non-detection 

September 10 15:00 - September 11 15:00 

The non-detection

The non-detection

September 9 15:00 - September 10 15:00 

The non-detection

The non-detection

September 8 15:00 - September 9 15:00

The non-detection

The non-detection

September 7 15:00 - September 8 15:00                  The non-detection       The non-detection
September 6 15:00 - September 7 15:00 

The non-detection

       The non-detection
September 5 15:00 - September 6 15:00

The non-detection

The non-detection

September 4 15:00 - September 5 15:00

The non-detection

The non-detection

September 3 13:15 - September 4 15:00

The non-detection

The non-detection

 

 We are not detected about artificial radioactive nuclide except the above either. 

 

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Saga prefectural government office (corporation number 1000020410004) 〒 840-8570  1-1-59, Jonai, Saga-shi   Tel: 0952-24-2111 (main)     
Copyright© 2016 Saga Prefecture.All Rights Reserved.

Saga prefectural government office (corporation number 1000020410004)

〒840-8570
1-1-59, Jonai, Saga-shi
Tel: 0952-24-2111 (main)
Copyright© 2016 Saga Prefecture.All Rights Reserved.