Dunno why the problem but did you get the quest to go there (think it's from over a radio transmission)?
When I turned up there was something going on and only after it was over could I enter the building.
have you tried clearing cache? fixes so many issues with so many games
hold the power button down on the xbox itself until it switches off then try it
hopefully that may fix your issue
May want to try posting here: http://www.gamesas.com/forum/318-xbox-one/
well its a graphical issue of some kind. See if there is a way to repair your game, as it's likely just a corrupt file.
You may have already tried this, but I will suggest anyway. Try entering from another door, such as the door from the motor pool by the power armor station.
Let me know if the alternate d?oor works, but if it does not uninstalling the game after backing up your saves, then download it again. I am also on the Xbox One, but thankfully have not had any probems as severe as this (and hopefully I will not as I already went through glitch hell with an TES IV: OBLIVION and Fallout: New Vegas). It is unfortunate that you have. No one should have to deal with these problems, but I suppose that is the price we pay.
Addendum: According to the wikia this bug affects all platforms, and occurs after completing several of the quests. It may get fixed eventually.
There seems to be a bug in this location for Xbox One. I had a bug similar to this in the same location. Though mine wasn't a graphical glitch, the quest givers did nothing. http://www.gamesas.com/topic/1564054-unable-to-turn-in-quests-quartermasterycleansing/