You would need all these tables from your saved DB file. Basically you can cut and paste thee tables and their info into a new text file and then save it as whatever.sql

nuke_bbauth_access
to
nuke_bbwords
total of 27 bb tables

also,
nuke_users
nuke_users_suspend
nuke_users_pending

The main ones though are all the _bb tables and the users table. If you are only planning to restore your Forums and posts and users info.

Once you get your Nuke/phpBB back up and running, then upload the whatever.sql fiel you made in phpmyadmin.
BACKUP your DB BEFORE uploading your whatever.sql file. Just in case it doesn't work.

mikem