:D
Sometimes I enjoy watching people. Today I get to watch and laugh at Jay in Kyiv while he outgases Radon.
My dad worked at a Uranium mill. Two of my uncles who served in the Army during World War II, did their wartime service inside of Uranium mines.
A Uranium mine is a hole in the ground where they scoop up material which contains a slightly larger concentration of Uranium than the surrounding soil. They remove the Uranium which otherwise would have been part of the dirt.
Flood a Uranium mine and what you have is a water filled hole in the ground which would have less of a concentration than it would have had before it was mined. Not that anyone would care. Uranium is a very heavy dense material, heavier than lead. It will want to sink to the bottom of a pool of water, rather than rise to the top. Any Gold will wind up on top of it.
Anywhere Uranium mines are, are also likely to places with lots of sandstone. Any county in the US where Uranium mines are, are places where the radioactivity of the dust from a county road gaveled with crushed sandstone will be high enough that the dust from that road would be radioactively hot to a higher degree than any water that might flood into, and then flow out of one of those mines.
It's time to bring up the outgassing of Radon. Radon comes from Uranium, it's water soluble to a high degree. There will be Radon Gas dissolved in the water coming out of those mines. It won't harm you unless you breath it as a gas. Radon gas will be in that water, just as it is in the water in most of the places where the background count of Uranium in the soil is high.
Like here. I pump my well water into a storage tank, it contains a lot of dissolved Radon gas. Because it is stored in a tank for a while before another pump picks it up, presserizes it in a pressure tank. During that period when it is in the unpressurized storage, an average period of about two weeks, that Radon comes out of suspension in the water, turns back into gas, and as a tiny bubble it rises to the top leaves the tank after mixing with the air on the top.
So Jay in Keiv is actually outgassing about Radon gas, not Uranium metal, and not a very serious matter in my book.