Local Measurement Results of Ambient Radiation Levels at the City Hospital (Updated February 15, 2017)

Measurements of ambient radiation levels were conducted within the City Hospital facilities in accordance with the city's ambient radiation measurement policy, 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)

City Hospital Health Plaza (Measurement Date: January 23, Weather: Clear)

Measurement Location	Measurement Values (Unit: microsieverts per hour) 1 centimeter above ground
Planting area in front of the main entrance of this hospital	0.085
Entrance side gutter of the west side multi-story parking lot of this hospital	0.052
Multilevel Parking Lot Entrance Drainage Pit	0.053
Southwest Multipurpose Annex Slope Entrance Drain at the Main Hospital	0.062
Drainage at the bottom of the stairs on the southwest side of the main building	0.062
Planting beside the drainage ditch on the south side of the main building	0.061
Drainage Grate in Front of Bus Stop	0.067
Main Hospital Tokyo Road Exit Side Ditch Drain	0.058
Planting area next to the crosswalk	0.053
Planting area next to the northwest crosswalk of this hospital	0.055

Sakahama Clinic (Measurement Date: January 23, Weather: Clear)

Measurement Location	Measurement Values (Unit: microsieverts per hour) 1 centimeter above ground
Rainwater drainage under the clinic entrance	0.071
Rainwater drainage under the clinic	0.093
Parking Lot Entrance (Gravel Area)	0.061

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

• City Hospital (PDF 68.9KB)