Local Measurement Results of Ambient Radiation Levels in Community Centers, etc. (Updated March 15, 2017)

Measurements of ambient radiation levels were conducted in community centers 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)

Omaru District Community Center (Measurement Date: February 2, Weather: Clear)

Measurement Location	Measurement Values (Unit: MicroSieverts per hour) 1 Centimeter Above Ground
In front of the entrance	0.089
In front of the toilet	0.060
Bicycle Parking	0.059
East Side of the Hall	0.065
In front of the park bench	0.042
South Side of the Park	0.058
Central Park	0.048

Oshitate Community Center (Measurement Date: February 2, Weather: Clear)

Measurement Location	Measurement Values (Unit: MicroSieverts per hour) 1 Centimeter Above Ground
In front of the entrance	0.080
South Side Bridge Pier of the Hall	0.080
South side of the hall	0.065
West Side of the Hall	0.070

Matsuba Community Center (Measurement Date: February 2, Weather: Clear)

Measurement Location	Measurement Values (Unit: MicroSieverts per hour) 1 Centimeter Above Ground
In front of the entrance	0.072
South side in front of the entrance	0.072
Rainwater Drainage Pit on the West Side of the Community Center	0.070
West Side of the Park	0.057
Central Park	0.060
Matsuba Community Center South Side	0.074

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

• Community Center, etc. (PDF 69.3KB)