Inquiry to this page
Environmental Planning Bureau greenery part greenery maintenance section
Telephone: 045-671-2650
Telephone: 045-671-2650
Fax: 045-664-2588
E-Mail address [email protected]
Radioactive cesium concentration and the measurement situation of quantity of space radiation rate
It is radioactive cesium concentration in "recycling plant of forest Park green of Yokohama animal" and the measurement situation of quantity of space radiation rate.
Last update date February 21, 2019
Radioactive cesium concentration of compost and raw materials
The measurementitem | The measurement day | Cesium 134 | Cesium-137 | The cesium total |
|---|---|---|---|---|
Compost just before shipment | March 24, 2015 | 2 | 6 | 8 |
Tip just before shipment | March 24, 2015 | 6 | 24 | 30 |
※Unit is becquerel /kg
Method for measurement
We are based on nuclide analysis by gamma-ray spectrometry using germanium semiconductor detector
※Yokohama-shi green business cooperative association which ran green recycling plant (the outside site) asked analysis organization for the measurement and carried out.
Shipment, sale of product
We measure at the time of shipment in the compost production, and shipment sells after checking being within the temporarily allowable value (product weight 400 becquerels/kg) that country showed.
Notices from country
Space radiation dose of site border
The measurement point | The measurement height | Measurements |
|---|---|---|
| The north side site border | 1m | 0.09 |
| The east side site border | 1m | 0.09 |
| The south side site border | 1m | 0.08 |
| Western site border | 1m | 0.05 |
※In sievert/microas for 1 unit
The measurement day
August 24, 2011
Measuring equipment
Sodium iodide, scintillation, survey meter
Others
In the radiation monitoring post which we installed in west municipal ownership place for Hodogaya Ward France, we started the regular measurement of atmospheric γ (gamma) dose of radioactivity in 1m above the ground point on March 29, 2012.
Inquiry about compost
Recycling plant of forest Park green of Yokohama animal
Telephone: 045-958-3028
FAX: 045-958-3029
(business hours: for from Monday to Friday 8:00-18:00)
