This mod was originally created and uploaded by ANDREIT51B on Bethplanet back in 2010. I couldn't reach original author since he was AFK for more than 12 years. But I wanted to give this little mod second chance to be seen by new foreign audience. And, like I already stated in Secret Bunker English version description - Since I couldn't reach original creator about translation permissions, I will delete this file by his request.

WHAT TO EXPECT
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1) New side quest with unusual flooded Vault 33 to explore (around 20-25 minutes to complete);

2) No, this mod has nothing to do with the upcoming Fallout TV series ("Vault 33" is just a coincidence);

3) Great interior design with lots of details and some raiders to shoot;

HOW TO INSTALL 
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Since I couldn't reach original creator about translation permissions, I will delete this file by his request (if he will contact me).
1) Place the .esp in the Data directory of the game;
2) Activate Vault33.ESP file and run the game.
OR
1) Just use Vortex installation path and activate plugin.

Also you can find translated .txt document in the main archive and spoiler screenshot if you will get stuck in some part of the quest.

HOW TO START
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You need to find new NPC named Thomas in Megaton 

BUGS AND CONFLICTS 
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No bugs, conflicts or game breaking problems were encountered in my play-testing sessions.
There was on minor bug with vanilla's Anchorage Stash Memorial Note (which was replaced by original creator of this mod), but I fixed it. 

CREDITS
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All rights and praises to original creator -  ANDREIT51B. 
I just wanted to translate and share his creation with bigger audience.
Again, I will immediately remove this file if  ANDREIT51B will contact me about this issue.
Original Mod Page