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Radiation dose result of a measurement of the city hall

 

 

◆Measurement contents

 We measure γ (gamma) dose of radioactivity of surface of the earth 1cm and 50cm at point that may become Mike Rothe pot around Yokohama-shi Government building. 

 

 

◆Radiation dose measurement (the Mike Rothe pot investigation) result

 Measurement location 

The situation of earth surface

 Measurements (μSv/h)

Measurement day

Weather  

 1cm

50cm 

1m 

 The neighborhood of slope to basement

Asphalt

0.07

0.07

 Tuesday, January 31, 2012

Fine weather

 Gutter of the parking lot side

Gutter

0.20

0.11

 Gutter of the kusuno tree open space side   

Asphalt 

0.08

0.07

 We plant the city hall

Tile

0.08

0.07

 We plant the city hall

Rainwater measure

0.13

0.09

 

 

[measuring instrument]

Scintillation survey meter for energy compensation form γ (gamma) line 

TCS-172B made by Aloka

 

 

 

[reference] "Indication" of Motoichi result of a measurement  
Higher surface of the earth
Yokohama-shi
1m
We cope using 0.23μSv/h or more as an indication 
50cm
We cope using 0.23μSv/h or more as an indication
(when it is more than 0.23μSv/h, we measure even 1m)
1cm
We cope using 0.59μSv/h or more as an indication