Meeting Valery Barstow is unlike any other meeting in the life of the Sole Survivor. Led by curiosity, they decide to investigate the Vault and put the remains of the construction crews out of their misery.
Walkthrough[]
Kill all of the ghouls (that aren't Valery Barstow). There should be about five or six feral ghouls.
Talk to Valery. Once she accesses the computer, she will request switching on the radio beacon in the reactor room (or simply comment on it being switched on).