Local Measurement Results of Ambient Radiation Levels at the Cultural Center (Updated April 1, 2017)

Measurements of ambient radiation levels were conducted in the Cultural Center facilities based on the city's policy for measuring ambient radiation levels, and the results are hereby announced.
In this measurement, there were no areas that require cleaning, as there were no locations exceeding the judgment criterion value (0.23 microsieverts per hour).
Note: For information regarding the attached Children's Center and After-School Childcare Program, please refer to the "Local Measurement Results of Space Radiation Levels at the Children's Center and After-School Childcare Program."

• Local Measurement Results of Space Radiation Levels at the Children's Center and After-School Childcare Program (Updated February 1, 2017)

Measurement Results (FY2016)

Central Community Center (Measurement Date: December 28, Weather: Clear)

Measurement Location	Measurement Value (Unit: microsieverts per hour) 1 centimeter above ground surface
South Side Lobby Drain	0.062
Front Entrance	0.054

Second Community Center (Measurement Date: January 7, Weather: Clear)

Measurement Location	Measurement Value (Unit: microsieverts per hour) 1 centimeter above ground surface
West Side Parking Lot Drain	0.088
Southwest Front Entrance	0.088
Northeast Side Library Entrance	0.082
North Side Stormwater Drain	0.061

Third Community Center (Measurement Date: January 19, Weather: Clear)

Measurement Location	Measurement Value (Unit: microsieverts per hour) 1 centimeter above ground surface
Slope Under Grating	0.076
Courtyard Rainwater Drain	0.073
Front Entrance	0.090
In front of the Third Library Entrance	0.067

Fourth Community Center (Measurement Date: January 13, Weather: Clear)

Measurement Location	Measurement Value (Unit: microsieverts per hour) 1 centimeter above ground surface
In front of the entrance	0.088

Shiroyama Community Center (Measurement Date: January 20, Weather: Clear)

Measurement Location	Measurement Value (Unit: microsieverts per hour) 1 centimeter above ground surface
Near the Entrance	0.090

Description

When converted to an annual dose, 0.23 microsieverts per hour corresponds to 0.99864 millisieverts per year, which is below the reference level for radiation exposure to the general public under normal conditions recommended by the International Commission on Radiological Protection (ICRP) (1 millisievert per year or less, excluding natural radiation). Therefore, this value is used as the city's decision criterion.
According to the Ministry of the Environment's "Decontamination Guidelines," if the radiation level at a depth of 1 meter below the surface 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 below the surface).

• Local Radiation Measurement Results of Public Facilities in the City

Measurement Overview

Measurer

City Staff

Measuring Equipment

PA-1000

Measurement Method

Average of 5 repeated measurements every 60 seconds

Past Measurement Results

• Cultural Center (PDF 68.2KB)