Right but lots of things are radioactive. The point is that the headline might give the impression that this could have been used to make a bomb or something. If it was natural uranium 7kg is peanuts. You need tons and tons to get enough fissionable material for one bomb.

Uranium has no stable isotopes. Some are more radioactive than others, but ‘radioactive’ uranium is a redundant term.

Bananas are radioactive. The ground under your house is probably radioactive. Saying something is radioactive is meaningless without saying _how_ radioactive it is.

The radioactivity even from enriched uranium is not much of a concern. Take a look at the half life U-238 and U-235