No, that's not what he implied.

, Putin said he was considering whether “to create on Ukrainian territory a kind of sanitary zone at such a distance from which it would be impossible to get our territory.”

Anyone who has spent more than 2 minutes listening to Putin and his "nuke"-speeches knows that a "sanitary zone" is a euphemism and means "nuclear wasteland". He threatens to create a radiation zone in Ukraine to prevent them from attacking russia.