First, is it even possible?
The answer is yes, absolutely. There is enough (non-weapons grade) spent civilian nuclear reactor fuel to get enough radioactive materials. Much more importantly, there is plenty of “know how” amongst Ukrainian scientists and engineers. Besides, bringing in radioactive materials or specialists is something the AngloZionist Hegemony could do. Did I mention plenty of starry-eyed Ukronazi politicians daydreaming on camera about how to nuke Russia and kill as many Russians as possible?
https://thesaker.is/a-few-thoughts-about-the-dirty-bomb-thesis-and-the-role-of-hatred/
I understand. And there were less than expected problems from Hiroshima and Nagasaki (actually recognized in retrospect; there was no going-in experience). But the problem with a dirty bomb is that it would be too easy to walk into a dangerous area unless the blast deposition pattern had been mapped out for safety. Waiting also helps, as the worst isotopes tend to have short half-lives. Gamma emitters, however, are the real problem, since the alpha and beta radiations can be stopped by clothing. There is also the problem of the chosen isotope being biologically active, like iodine or strontium. Don't want to ingest any of that.
Sort of comparable to a "toxic sludge bomb." Messy. Not dangerous if you don't mess with it. A pain in the ass to clean up. Will not produce mutants.