From Sugar Nat

Present radiation hotspots in Nagareyama city, Chiba Prefecture (near Tokyo)

Measure taken at 1m from the ground : 0.57μSv/h

Measure taken at 50cm from the ground : 0.89μSv/h

Measure taken at ground level : 2.17μSv/h

Read more in Japanese :

http://hotspot-i-t.blogspot.fr/2017/06/blog-post_11.html?m=1

We are presenting here a transcription of an NHK TV documentary (note1) on insoluble radioactive particles found in Fukushima and in the Tokyo metropolitan region. This is the 3rd part of the 3 parts.

Her is the 1st part : https://fukushima311voices.wordpress.com/2017/07/14/insoluble-radioactive-particles-part-1/

Here is the 2nd part : https://fukushima311voices.wordpress.com/2017/07/14/insoluble-radioactive-particles-part-2/

As you can see below, small insoluble radioactive particles are dispersed in the Tokyo metropolitan area. We believe that this represents serious health problems for the population in terms of internal irradiation, since the insoluble radioactive particles remain in the body for a long time. For anybody who would stay in this metropolitan area, further radioprotection against internal irradiation would be required.

Takeda: I will ask Yuichi Moriguchi, who is carrying out investigations on radio-contamination caused by the accident, including the insoluble radioactive particles, how many of such insoluble radioactive particles exist and in what range of area?

Moriguchi:…

We are presenting here a transcription of an NHK TV documentary (note1) on insoluble radioactive particles found in Fukushima and in the Tokyo metropolitan region. This is the 2nd part of the 3 parts.

Here is the first part.

Insoluble radioactive particles that do not dissolve in water.

This characteristic is supposed to make a big difference when considering health effects.

In the past, radioactive cesium emitted in the nuclear accident was thought to be carried away adhering to water-soluble particles called aerosols in the atmosphere. When it touches the water the particle melts and the cesium diffuses and gets diluted. The same is true when it is inhaled in the lungs; the water-soluble cesium melts into the body fluid and spreads thinly throughout the body. Then it is supposed to be discharged gradually by the metabolic activity, and decreases by half from 80 to 100 days in the case…

We are presenting here a transcription of an NHK TV documentary (note1) on insoluble radioactive particles found in Fukushima and in the Tokyo metropolitan region. Since it is quite heavy with images, it will be uploaded in 3 parts.

These particles contain cesium, which has the property to dissolve in water. However, in the case of these particles, the cesium was taken into glass-like particles during the Fukushima Daiichi NPP accident before it was blown away by the explosion. These particles do not dissolve in water, and as a consequence the cesium will remain longer both in the environment and in the human body, which will modify the impact of radioactive materials on the environment and on health.

Here the video in Japanese: https://youtu.be/ipOEfS-06FM

Takeda: A round particle like a marble.
Rugged particles like asteroids.
Presently, the researchers are paying attention to them.

Very small particles contain radioactive cesium.