Local Measurement Results of Space Radiation Levels in Kindergarten (Updated January 1, 2017)

Measurements of ambient radiation levels were conducted in the Kindergarten 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).

Measurement Results (Conducted in Fiscal Year 2016)

Aoba Kindergarten (Measurement Date: July 8, 2016, Weather: Clear)

Measurement Location	Measurement Values (Unit: microsieverts per hour) 1 centimeter above ground
Bicycle Parking	0.083
Playground (Building Side)	0.082
Playground	0.061
Playground (Entrance Side)	0.067
Garden (Gate Side)	0.059

Komakusa Kindergarten (Measurement Date: July 14, 2016, Weather: Clear)

Measurement Location	Measurement Values (Unit: microsieverts per hour) 1 centimeter above ground
Next to the Kamado Hut	0.059
Next to the Birdhouse	0.048

Komazawa Women's Junior College Attached Komazawa Kindergarten (Measurement Date: July 4, 2016, Weather: Clear)

Measurement Location	Measurement Values (Unit: microsieverts per hour) 1 centimeter above ground
Back Door Warehouse Front	0.083
Behind the Swing	0.062
In front of the playground equipment	0.063
Behind the Garden Storage	0.069
Playground Entrance Drainage Pit	0.060

Hanabusa Kindergarten (Measurement Date: July 12, 2016, Weather: Clear)

Measurement Location	Measurement Values (Unit: microsieverts per hour) 1 centimeter above ground
Garden Corner	0.076
Sandbox Side	0.044
Behind the Playground Equipment	0.077
Playground Sandpit	0.062
Corridor between buildings	0.090

Hirao Wakaba Kindergarten (Measurement Date: July 12, 2016, Weather: Cloudy)

Measurement Location	Measurement Values (Unit: microsieverts per hour) 1 centimeter above ground
In front of the hall	0.059
In front of the nursery	0.056
In front of the playground equipment	0.042
Sandpit	0.042

Yano Kuchi Kindergarten (Measurement Date: July 8, 2016, Weather: Clear)

Measurement Location	Measurement Values (Unit: microsieverts per hour) 1 centimeter above ground
Center of the Garden	0.049
Sandpit	0.056
Water Fountain	0.071

Rika Kindergarten (Measurement Date: July 6, 2016, Weather: Cloudy)

Measurement Location	Measurement Values (Unit: microsieverts per hour) 1 centimeter above ground
North Garden	0.063
Near the shed gutter	0.061
South Water Drinking Place of the Nursery	0.076
1st Floor Corridor	0.065
Near the irrigation canal	0.043

Description

When converted annually, 0.23 microsieverts per hour amounts to 0.99864 millisieverts, which is below the standard value for radiation exposure for the general public during normal times (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 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 Employee

Measuring Equipment

PA-1000

Measurement Method

Average of 5 repeated measurements every 60 seconds

Past Measurement Results

• Kindergarten (PDF 118.1KB)