I know what you're saying, but you can't get the entrance on your world map by going in through that way.
You don't need the entrance location on your world map anyway, because the only way into the vault interior is the way you're doing it.
I know it sounds a little confusing...but the surface entrance isn't relevant to the plot or achievements.
lol no.
Even an advanced rad suit won't protect you completely from that amount of radiation.
You might have to spam rad-x and radaway as well as a suit of some sort...but I've never accomplished it (like I said, it's not something you need to do...I was just curious).
I never used the rad suits anyway, just decent power armour...probably Enclave Hellfire![]()