The Forestry Agency, “Internal exposure dose of cedar pollen is 0.206 μSv”


On 2/12/2013, Fukushima Diary reported “90,500 Bq/Kg of cesium from the pollen of Japanese cedar in Fukushima” [URL]

The forestry agency announced the internal exposure dose would be 0.206μSv on the assumption that a person breathes the 90,500 Bq/Kg level of pollen for 4 months in the highest density.

It is the same level of the dose when you are outside for 4 hours in Shinjuku Tokyo, which is not harmful.

However, it is pointless to compare the internal exposure and the external exposure. Also, the internal exposure effect must differ from ages and sex etc..
The specific calculation is not announced.



Français :

L’Agence Forestière : “La dose d’exposition interne du pollen de cèdre est de 0,206 μSv”

Le 12 février 2013, le Fukushima Diary rapportait que l’on trouvait 90 500 Bq/kg de césium dans le pollen des cèdres japonais de Fukushima

L’agence Forestière a annoncé que la dose d’exposition interne devrait être de 0,206 μSv sur l’hypothèse qu’une personne respirant les 90 500 Bq/kg du pollen pendant 4 mois au pire.

C’est du même niveau que ce qu’on a lorsque on reste dehors 4 heures à Shinjuku dans Tokyo, ce qui n’est pas dangereux.

Cependant, comparer les expositions internes et externes est n’a aucune valeur. De plus, les effets de l’exposition interne sont différents en fonction de l’âge, du sexe, etc..
Leur méthode de calcul n’est pas décrite.

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This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.