First off, fix your formatting. This is hard to read. You need two new lines to form one in HN, but it kinda looks like you already know that.
> Yes, with a half-time of 30 years.
Biological half lives tend to be A LOT shorter. It is something like 90 days in humans (for Cesium). There's also the uptake rate, which IIRC is about 10%.
> Nothing short of a nuclear reaction is going to "break them down", certainly not organisms or chemical reactions
Oh, sorry. I didn't realize that radiation means that electrons will no longer form bonds. That's really interesting. But I have a question. This being true, can you tell me how we get solids? Or are you saying that radioactive materials can only bind to other materials with similar radioactive properties? I can tell you that I never learned this in any of many physics classes nor while I was working as a radiation researcher. If this is a new study done by you I'm excited to see you win the Nobel. Really groundbreaking work.
> No, I did no such thing. I said that wild boar is contaminated worse as they keep eating mushrooms for years while each mushroom only has a couple of days to aggregate radioactive isotopes.
10% uptake, shorter biological half life. This isn't a system with positive feedback. The more degrees the more dilution. The Cs is in the ground, mushrooms eat that (1 degree), boars eat that (2 degrees), humans eat that (3 degrees). Minimum. We are assuming that the Cs is just laying nicely and not being diluted by worms and bugs before it is absorbed by the mushrooms.
> It wasn't "some article" I quoted, but the official information of the federal office for nuclear safety.
You're pulling from much more than that article. Your domain experts in this thread are breaking down that official information and explaining what things mean (note, neither of us have disputed it). For example, what is a Sievert? How dangerous is it? How much is safe? Can this be explained in a way without years of studying atomic physics and nuclear medicine?
What you're doing is reading that and saying "Look how dangerous this stuff is!" We're looking at it and saying "Ah cool, so as long as I don't eat 500 kilos of wild mushrooms in a year I'll be good". There's a big difference between these two points of view. But again, I'm not disputing what is in that documentation. I am drawing from it to demonstrate how safe things are.