Local measurement results of air radiation dose in Inagi Fureai no Mori (updated on February 1, 2017)
Update date: February 1, 2017
We have measured the air radiation dose within the Inagi Fureai no Mori 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)).
Measurement results (implemented in FY2016)
| Name of facility | measuring date | weather | Measurement location | Measured value (unit: microsievert per hour) |
|---|---|---|---|---|
| 1 cm above ground | ||||
| Inagi Forest of Friendship | 2016 December 19 |
sunny | Next to the parking lot | 0.027 |
| Gutter (south side of former leader hut) | 0.047 | |||
| Management hut (west side) | 0.053 | |||
| Management hut (entrance) | 0.039 | |||
| Summit Table | 0.053 | |||
| Kitchen (side) | 0.039 | |||
| Gutter (before the foot washing area) | 0.041 | |||
| Inside the kitchen | 0.050 | |||
| South outer circumference road (under the stairs) | 0.030 | |||
| fire field | 0.034 | |||
| Fire place (stage) | 0.026 | |||
| South Outer Ring Road | 0.032 | |||
| Jujuan | 0.032 | |||
| Southern fountain (on the bridge) | 0.033 | |||
| Southern fountain (on the water) | 0.043 | |||
| Hinosha | 0.067 | |||
| North outer circumference road (swamp) | 0.038 | |||
| North Outer Ring Road | 0.023 | |||
| Tent site (north) | 0.051 | |||
| Tent site (west) | 0.032 | |||
| Tent site (east) | 0.022 | |||
| Tent site (south) | 0.038 |
【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).
Measurement overview
- Measurer city employee
- measuring equipment
PA-1000
- Measuring method
Average of 5 repeated measurements every 60 seconds
Past measurement results
Inagi Fureai no Mori (PDF: 74KB)
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Inquiries about this page
Inagi City Welfare Department Children and Youth Division
2111 Higashi-Naganuma, Inagi-shi, Tokyo
Phone: 042-378-2111 Fax: 042-377-4781
