Radioactive Substance Analysis Test (Shiitake Mushrooms)
- KIWITA
- Jan 16
- 2 min read
Results of Radioactive Substance Measurement
Using a Non-Destructive Radiation Measuring Device
Fukushima City Environmental Department
Environmental Division
Director, Radiation Monitoring Center
(Official seal omitted)
The results of the measurement of radioactive substances requested on April 23 2014 are as follows.
1. Measurement date:
April 23, 2014
2. Measurement results:
Mushroom (Shiitake)
The specimen [Shiitake mushroom] was submitted to the analysis organisation using the following two patterns.
Details
① Clean with pure water (approx. 2.5 kg)
Soak in 6000ml of pure water for 60 minutes.
After 60 minutes, lightly rinse the shiitake mushrooms and drain the water.
② Clean with 10 times diluted umo concentrated solution (approx. 2.5 kg)
Soak in 6000ml of UMO concentrated solution 10 times diluted for 60 minutes.
After 60 minutes, lightly rinse the shiitake mushrooms and drain the water.
①Clean with pure water (approx. 2.5 kg)
Measurement details & Concentration (Unit: Bq/kg)
Radioactive Cesium: 803 Bq/kg
② Clean with 10 times diluted umo concentrated solution (approx. 2.5 kg)
Measurement details & Concentration (Unit: Bq/kg)
Radioactive Cesium: 314 Bq/kg
① Clean with pure water (approx. 2.5 kg)
Specimen Name : Shiitake Mushroom (Washed with pure water)
Notices :
Test item result
Iodine-131 Not detected
Cesium-134 110Bg/kg
Cesium-137 300Bg/kg
② Clean with 10 times diluted umo concentrated solution (approx. 2.5 kg)
Specimen Name : Shiitake Mushroom (Washed with UMO concentrated solution 10 times diluted for 60 minutes.)
Notices :
Test item result
Iodine-131 Not detected
Cesium-134 84Bg/kg
Cesium-137 230Bg/kg
Notes 1
Test conditions: Tested without sap.
Note 2
2L marine container, measurement time: 1000 seconds. The lower limit of detection and the valid figures of the test results were by "2.3 Handling of test results" of Food Safety Agency No. 0315 4 "Radioactive Cesium Testing Method in Food".
Explanation
Iodine-131: This is a type of iodine that's radioactive. It's used in medicine but can also be released during nuclear accidents. It doesn't stick around for long, though, as it decays quickly.
Cesium-134: This is a radioactive form of cesium. It's made during nuclear reactions and can be released in accidents. It lasts longer than Iodine-131 but still decays over time.
Cesium-137: Another type of radioactive cesium. It's also produced in nuclear reactions and can be released during accidents. It sticks around for a long time, which can be a problem for the environment.
Note: This paper is translated from the following URL. The content is provided for reference on the scientific research of the raw material only. Whether APA raw materials are used or not, we hope this research will help increase understanding and awareness of body minerals.
Comments