This article has a bit of details:

The flimsiness of the claims led some diplomats and experts to suspect it was not intended to convince anyone but to send a message, but it is unclear what that message may be.
[...]
The Kyiv government has asked the IAEA to verify that no radioactive materials in Ukraine have gone missing, and the UN nuclear watchdog said it was preparing to send inspectors to two unidentified Ukrainian sites, both already subject to frequent inspections.
[...]
Perhaps significantly, the Russian allegation has prompted rare communication with the west, with Moscow’s armed forces chief of staff, Valery Gerasimov, speaking on Monday to his US counterpart, Mark Milley, for the first time since May. — Russia steps up Ukraine ‘dirty bomb’ claim in letter delivered to UN · The Guardian · Oct 25, 2022

Nuclear materials are identifiable.

Russia Calling for ‘Desatanization’ of Ukraine (Truth or Fiction? Oct 25, 2022)

Apparently so, however weird. By government officials, first deNazification, then deMilitarization, now deSatanization. :D What's up in Moscow anyway?

At this rate we can soon hear from Russian screens that it was USA and NATO that attacked Ukraine, not Russia. — Anton Gerashchenko (Oct 26, 2022)

Meanwhile, real life on the ground, translations via Katya Soldak, Polina Raskazova, google:

Ivan Fedorov / Melitopol / Mayor
The occupiers continue to hold the population of Zaporizhzhia, Kherson, Luhansk and Donetsk regions hostage.
Yesterday, the Russians released a total of 94 people from the occupied parts of 4 regions of Ukraine to Zaporizhzhia. 33 of them are residents of Melitopol and the district.
At the same time, the weather conditions are getting worse every day.
The dirt road in the "gray" zone near the village of Kamianske, which is the next settlement after the enemy checkpoint in Vasylivka, is being washed away by the rains.
If people are not released now, it will be much more difficult for them to leave later. Rashisti understand this, but continue to release dozens instead of thousands.
#EvacuationfromOccupation — Telegram (Oct 26, 2022)

They'd have to flee a good way though, can't just get on West Jet to Lviv.