Local Measurement Results of Ambient Radiation Levels at the Environmental Learning Center (Updated March 1, 2017)

In accordance with the policy for measuring ambient radiation levels in the city, measurements of ambient radiation levels were conducted at the Environmental Learning Center, 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: The former name of the Environmental Learning Center was "Recycling Shop".

Measurement Results (Conducted in Fiscal Year 2016)

Environmental Learning Center (Measurement Date: February 21, Weather: Clear)

Measurement Location	Measurement Values (Unit: microsieverts per hour) 1 centimeter above ground
Downspout on the west side of the main building	0.063
Main House Entrance	0.076
Downspout on the south side of the main building	0.073
Next to the Tsukagawa Kaido Side Entrance	0.061
Near the Misawa River Entrance	0.066

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

• Environmental Learning Center (Former Recycling Shop) (PDF 52.9KB)