Hi KC.
I'm not sure why I can't post to the forum right now.
Maybe you can pass on a link to an expanded EC website I found while looking into this fire. Eurdep does not show government sensor data from Ukraine or Belarus, but this one does:
https://remap.jrc.ec.europa.eu/GammaDoseRates.aspx.
I could not see any increases around Chernobyl corresponding to this fire.
--Bert