There is, however, an additional possibility. Very fine particles attract Radon: you get a slight increase in gamma from Radon near factory chimneys that emit fine particles.
The European radiation detector system web map came back online on May 18. The map type had been changed and everything we saw in the downloads had disappeared or had been smudged out by data analysis averaging. Why? This, and the early blocking of access to the site suggest
panic and cover-up.
So taken all together, what we see is a massive explosion which is thought to be DU, and reports of a spike in gamma radiation near the site. Uranium oxide is black, and the black plume moves north west slowly, the weather pattern is stable and the wind blows to Poland. The Polish EU detectors all show gamma radiation increases at the expected time of arrival of the plume. The EU detector system is shut down rapidly, but not before we have obtained data from several sites. The Poles provide a detector result that identified Bismuth as the cause of the increase, but do not go so far as to formally state that it is (in case of later blowback).
One final piece of evidence. We see videos on the internet of the Ukrainians clearing up the explosion site using Robot vehicles, not ordinary firemen. Why do they need Robot vehicles? The last times we saw Robot vehicles clearing up was in the ruins of Chernobyl and Fukushima.
If I am right, there has been an environmental disaster, and the DU particles will travel across Poland, Germany and Hungary, and will end up in the Baltics, probably later the whole of Europe including the UK (after all, the Chernobyl Uranium particles came to the UK).
They will deliver genetic damage and death like that seen in the Balkans and Iraq. Cancer, birth defects, miscarriage, infertility, lung damage, mental problems (Gulf War Syndrome) and so forth. The scientific and epidemiological evidence on this has been clear since the Gulf War. It is all there in the scientific literature—but the governments in the West and the military ignore it, deny it and cover it up. In the case of the UK coroners court finding for Stuart Dyson, the jury found that DU caused his fatal colon cancer. But when the coroner wrote to the health minister (as he had to by UK law, Rule 43) the reply was: we disagree. This stuff can be measured, but no one will measure it, or if they do, they will be attacked and their arguments dismissed.