2011年06月06日 (月)

Radiation measured in the waters and air ( Fukushima Plant )

June 06, 2011 (Monday)

Radiation measured in the waters and air near the No.1 Fukushima Nuclear Power Plant (Source: Tokyo Electric Power Co. TEPCO) 

MAP   http://www3.nhk.or.jp/news/genpatsu-fukushima/houshasen/index2.html
 
      【No.1 Plant : Radioactive substances detected in the waters 】 

【A】 From samples collected 30 meters north of the outlets of the Unit 5-6 at 09:10 June 05.

        Iodine 131:         ND       (--- times the limit)
        Cesium 134: 0.031 Bq/cc (0.52 times the limit)
        Cesium 137: 0.033 Bq/cc (0.37 times the limit)
【B】 From samples collected 330 meters south of the outlets of the Unit 1-4 at 08:45 June 05.
        Iodine 131:         ND       (--- times the limit)
        Cesium 134: 0.035 Bq/cc (0.58 times the limit)

        Cesium 137: 0.040 Bq/cc (0.44 times the limit)

      【No.2 Plant : Radioactive substances detected in the waters 】       

【C】 From samples collected near the outlets of the Unit 3-4 at 09:30 June 05.      10km south of the No.1 Plant

       Iodine 131:         ND       (--- times the limit)
        Cesium 134: 0.013 Bq/cc (0.22 times the limit)
        Cesium 137: 0.010 Bq/cc (0.11 times the limit)
【D】 From samples collected 7km south of the outlets of the Unit 1-2 at 07:45 June 05.        16km south of the No.1 Plant
       Iodine 131:         ND       (--- times the limit)
        Cesium 134: 0.010 Bq/cc (0.17 times the limit)
        Cesium 137: 0.013 Bq/cc (0.14 times the limit)
 
the limit :   the limit set for water outside the environmental monitoring area
 
       【No.1 Plant : Air dose  】
 ▼southern side of The main office: 500 meters north-west of the Unit 2 .
         362  μSv/h       Time:09:00 June 06,2011    Winds: east-southeasterly 1.3 m/s
 near the Main Gate : 1,000 meters west of the Unit 2 .
       30.7μSv/h      Time:09:00 June 06, 2011   Winds: east-southeasterly 1.3 m/s.
  There was no neutron dose detected.

 

In the event the seawater contains more than two nuclides, the density of each nuclide is scaled against its allowable limit. Thereafter the sum of the scaled densities of all nuclides is gauged against 1.

 Let's assume the scaled density of I-131 is 0.20 times the limit and that of Cs-134 is 0.70 times the limit and that of Cs-137 is 0.60 times the limit, for example. In this case, the sum of the scaled densities of I-131 and Cs-134 and Cs-137 becomes 1.50 times the limit. This means the radioactive material in the seawater exceeds the allowable limit.

投稿者:かぶん |  投稿時間:18:56  | カテゴリ:Data of the Fukushima Daiichi
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