Inagi City

Local measurement results of air radiation dose in Inagi Fureai no Mori (updated on February 1, 2017)

Last updated: February 1, 2017

We have measured the air radiation dose within the Inagi Fureai no Mori facility based on the city's air radiation dose measurement response policy, and we would like to announce the results.
In addition, during this measurement, there were no locations that required cleaning, etc. (locations that exceeded the judgment standard value (0.23 microsieverts per hour)).

Measurement results (implemented in FY2016)

Name of facility measuring date weather Measurement location Measured value (unit: microsievert per hour)
1 cm above ground
Inagi Forest of Friendship 2016
December 19
sunny Next to the parking lot 0.027
Gutter (south side of former leader hut) 0.047
Management hut (west side) 0.053
Management hut (entrance) 0.039
Summit Table 0.053
Kitchen (side) 0.039
Gutter (before the foot washing area) 0.041
Inside the kitchen 0.050
South outer circumference road (under the stairs) 0.030
fire field 0.034
Fire place (stage) 0.026
South Outer Ring Road 0.032
Jujuan 0.032
Southern fountain (on the bridge) 0.033
Southern fountain (on the water) 0.043
Hinosha 0.067
North outer circumference road (swamp) 0.038
North Outer Ring Road 0.023
Tent site (north) 0.051
Tent site (west) 0.032
Tent site (east) 0.022
Tent site (south) 0.038

【explanation】
0.23 microsieverts per hour is converted to 0.99864 millisieverts per year, which is below the normal radiation dose recommended by the International Commission on Radiological Protection (ICRP) for the general public (1 millisievert per year or less (excluding natural radiation, etc.)). Therefore, this value is used as the city's standard value .
The Ministry of the Environment's "Decontamination Guidelines" state that if the radiation level one meter above the ground is below 0.23 microsieverts per hour, no further action should be taken. However, the city is taking a more cautious approach and is deciding on its response based on the results of measurements taken at the closest point to the object (one centimeter above the ground).

Measurement overview

Past measurement results

Inquiries about this page

Inagi City Welfare Department Children and Youth Division
Phone: 042-378-2111