Local Radiation Measurement Results for the Complex Facility Friend Hirao (Updated January 1, 2017)

Measurements of ambient radiation levels were conducted in the Hirao Friend Complex facility based on the city's policy for measuring ambient radiation levels. We will now announce the results.
Additionally, 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)

Complex Facility Friend Hirao (Measurement Date: September 27, 2016, Weather: Clear)

Measurement Location	Measurement Values (Unit: MicroSieverts per hour) 1 Centimeter Above Ground
East Entrance in Front of the Regular Classroom Building	0.060
Gym Entrance	0.058
West Entrance in Front of the Regular Classroom Building	0.061
Sports Field Entrance	0.062
South of the Sports Ground	0.062
West of the Sports Ground	0.066
North of the Sports Ground	0.045
Infirmary Special Classroom Building Front	0.061
In front of the gym storage	0.059

Description

When converted to an annual basis, 0.23 microsieverts per hour amounts to 0.99864 millisieverts, which is below the standard for normal radiation exposure for the general public (less than 1 millisievert per year, excluding natural background radiation) as recommended by the International Commission on Radiological Protection (ICRP). 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 measurement results 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

• Hirao Friendship Complex (PDF 59.2KB)