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River management section

Radiation dose of river facility (hydrophilic bases)  

  • Measurement contents
    We gave priority to hydrophilic base or activity place of waterside protection society where children played and measured.
  1. General space radiation dose
    In central place 1-2 spots of hydrophilic bases, we measured 50 centimeters of surface of the earth and space gamma dose of radioactivity of 1 meter.

  2. Radiation dose at point that may become Mike Rothe pot
    In facilities of hydrophilic bases, we measured gamma dose of radioactivity of 1 centimeter of surface of the earth, 50 centimeters and 1 meter at place that might become Mike Rothe pot.

  • About measuring instrument
    Measuring instrument which we used for the measurement is following two kinds.

      TCS-172B (product made in Hitachi Aloka Medical Corporation)
      Detector NaI (TI) scintillation detector


      Mr.Gamma A2700 type (product made in clear pulse company)
      Detector CsI (TI) scintillation detector
     

     
 

        General space radiation dose            

      It becomes Mike Rothe pot
   Radiation dose at point with possibility   
   

  Tsurumi

Result indication

Result indication

 Kanagawa

Result indication

Result indication

 The west

Result indication

Result indication

 Medium

Result indication

Result indication

 The south

Result indication

Result indication

 Konan

Result indication

Result indication

 Hodogaya 

Result indication

Result indication

 Asahi

Result indication

Result indication

 Isogo

Result indication

Result indication

 Kanazawa

Result indication

Result indication

 Kohoku

Result indication

Result indication

 Green

Result indication

Result indication

 Green leaves

Result indication

Result indication

 Tsuzuki

Result indication

Result indication

 Totsuka

Result indication

Result indication

 Sakae

Result indication

Result indication

 Spring

Result indication

Result indication

 Seya

Result indication

Result indication

 

  • About "indication" of correspondence of radiation dose result of a measurement in Yokohama-shi

  • Higher surface of the earth 

    Yokohama-shi 

     1 meter

    We cope using 0.23μSv/h or more as an indication 

     (50 centimeters)

     (we cope using 0.23μSv/h or more as an indication)
    (when it is more than 0.23μSv/h, we measure even 1 meter)

     1 centimeter

     We cope using 0.59μSv/h or more as an indication

 

  •  When there is request of the measurement, other than this investigation point, please refer to engineering works office of each ward for facility to manage in engineering works office.
    → Page of list of engineering works offices

 

 

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