Upon first discovering the World of Refreshment this quest begins. The player character must clear the exterior and the interior of the plant in order to secure it for the gangs. Robots can be found inside the plant guarding it, while both outside and inside several variations of Nukalurks roam about.
Once the plant is cleared the flag for one of the raider gangs must be raised. The flagpole is located on the top of a large red Nuka-Cola bottle on the roof of the plant. An elevator is hanging from it to reach the top of the bottle.
PCPlaystation 4 Under certain conditions, the quest status shows the exterior is cleared but will not grant that the interior is cleared (even if it is) if some mirelurks are left alive outside, at the Nuka-Cola bottling plant park entrance (near the moat entrance for the World of Refreshment). [verified]
PCPlaystation 4 Under certain conditions, the quest status shows the interior is cleared but will not grant that the exterior is cleared (even if it is) at the Nuka-Cola bottling plant. [verified]
Using console command setstage xx03684e 1000 skips to the "Assign gang" stage of the quest. Make sure to clear all hostiles beforehand.
The only other way to move past the quest when this occurs is to type resetQuest xx03684e into the console.
On console platforms, reloading an earlier save seems to be the only solution to fix this.