bring back the on-station nuclear charge

[Musketman12]

I'd say put them in head offices, and introduce a mobile particle trap that is a deployable object, which - while deployed and turned on - emits a distinctive blue light, shows an easily noticable animation, and prevents the removal of objects from that tile. It would also be a teleport jammer effect for that tile, and it's also dense and anchored, so it could double as a blockade barrier. Unless emagged, it would not turn on while a mob is on the same tile and even when emagged, it would take several seconds to start up, so it's not an easy way to trap someone; but it cannot be shut off from the inside.

Switching the particle trap would require a card swipe from an ID card with bridge access (thus, a head card).

And then there would be six pieces of the nuke (including the body itself), each of which starts off in a head's office with the jammer activated.

There should be one in the AI core too.