There can be many other lore friendly ideas on how the radiation contaminated the vault making them ghouls including the reactor parts we find laying about that may have been radiactive during the first few years after the bombs fell. that contaminated the quarry got into the vault or at least its water supply for at least the first few years.Ģ) the door may have been open when the bombs first started contaminating the area in the vault before it got closed and those who fled the room with the door before being trapped below the radiation then faded over the next 200ish years.ģ) It came in through the other entrances that are far from being air tight or radiation proof.
Basically we can assume one of the following.ġ) radiation is not blocked by the rocks or cave so for a time the radiation from the bombs etc.
