Chernobyl might be further north but, the contamination affected the Dnieper River that flows through Kyiv and for approx two years afterwards, people were banned or strongly advised against paddling, swimming and fishing in the river.
And the streets of Kyiv were washed daily to prevent any airborne contamination setting on the busy streets.
I visited Kyiv twice in ‘89 and ‘90 and witnessed the street washing personally.
Any incident would contaminate large swathes of the Ukraine and some would travel west into Europe based on the weather patterns.
They circulate differently at different altitudes (around 8km to 9km up they circle towards the west), but there is current depression over the Ukraine.
With typical air currents and this, Russia would be covering large swathes of eastern Ukraine, Crimea, and southern Russian in fallout if an event were to occur.
What would the benefit of that be?
Hopefully - been a long time coming. Ukraine definitely carrying the fight to them in the south.
The hitting of air bases, logistic, ammunition dumps and rail and road infrastructure clearly benefits the overall war effort, but could it point to posturing for winter?
When the weather turns in October and November, there could be a lot of Russian troops isolated (stranded in some cases) with minimal logistic support.
Russia may keep pouring ill-trained troops into the fold, with little desire to fight, but the cold and lack of resources could slowly but surely do the damage.