Local measurement results of air radiation dose at infant child care facilities (updated on January 1, 2017)

We have measured the air radiation dose within the infant childcare facility based on the city's air radiation dose measurement response policy, and we would like to announce the results.
In addition, during this measurement, there were no locations that required cleaning, etc. (locations that exceeded the judgment standard value (0.23 microsieverts per hour)).
Since FY2015, we have been measuring at Shiroyama Nursery School Minamiyama, Hongo Yuushi Nursery School (formerly Daini Nursery School), and a certified children's school (Children's Forest Child Care Center).

【explanation】
0.23 microsieverts per hour is converted to 0.99864 millisieverts per year, which is below the normal radiation dose recommended by the International Commission on Radiological Protection (ICRP) for the general public (1 millisievert per year or less (excluding natural radiation, etc.)). Therefore, this value is used as the city's standard value .
The Ministry of the Environment's "Decontamination Guidelines" state that if the radiation level one meter above the ground is below 0.23 microsieverts per hour, no further action should be taken. However, the city is taking a more cautious approach and is deciding on its response based on the results of measurements taken at the closest point to the object (one centimeter above the ground).

• Measurers City staff and facility staff

• measuring equipment

　　PA-1000

• Measuring method
  Average of 5 repeated measurements every 60 seconds