Local Measurement Results of Ambient Radiation Levels at Inagi Fureai Forest (Updated February 1, 2017)

Measurements of ambient radiation levels were conducted in accordance with the policy for measuring ambient radiation levels in the city at the Inagi Fureai Forest facility, and the results are hereby announced.
Furthermore, there were no areas identified in this measurement that require cleaning or other actions (areas exceeding the judgment criterion of 0.23 microsieverts per hour).

Measurement Results (Conducted in Fiscal Year 2016)

Inagi Fureai Forest (Measurement Date: December 19, 2016, Weather: Clear)

Measurement Location	Measurement Values (Unit: MicroSieverts per hour) 1 Centimeter Above Ground
Next to the parking lot	0.027
Drainage ditch (south side of the old leader's hut)	0.047
Management Shed (West Side)	0.053
Management Shed (Entrance)	0.039
Summit Table	0.053
Cooking Area (Side)	0.039
Gutter (in front of foot washing area)	0.041
Kitchen	0.050
South Outer Route (Under the Stairs)	0.030
Fire Pit	0.034
Fire Area (Stage)	0.026
South Outer Ring Road	0.032
Jujuan	0.032
Minami no Izumi (On the Bridge)	0.033
Minami no Izumi (On the Water)	0.043
Hinokiyasha	0.067
North Outer Ring Road (Sawa)	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

Description

When converted to an annual basis, 0.23 microsieverts per hour amounts to 0.99864 millisieverts, which is below the standard for radiation exposure recommended by the International Commission on Radiological Protection (ICRP) for the general public (less than 1 millisievert per year, excluding natural background radiation). Therefore, this value is used as the city's judgment criterion.
According to the Ministry of the Environment's "Decontamination Guidelines," if the radiation level at 1 meter above the ground is below 0.23 microsieverts per hour, no further action is required. However, our city takes a more cautious approach and makes decisions based on measurements taken at the closest point to the object (1 centimeter above the ground).

• Local Radiation Measurement Results of Public Facilities in the City

Measurement Overview

Measurer

City Employee

Measuring Equipment

PA-1000

Measurement Method

Average of 5 repeated measurements every 60 seconds

Past Measurement Results

• Inagi Fureai Forest (PDF 74.6KB)