It checks out as possibly being an oil facility. It is also as a town with rail and transport links to kiev and odessa from lviv, it also has an airport, and as an oblast had been relatively away from combat. It also had a few factories, depots. These might have been converted into warfare.

Definitely in use for operations.

As far as a tactical nuke. No. I doubt it. The blast didn't spread out.

Replying previously didn't read the link, missed it. Rather debated Ukraine with nukes or nukes deployed.

Easy searching stuff. I am speculating slightly. But it's not hard to summarise.