Some of both. I didn't use a lot of direct reference when I did this, but built further upon the designs I used for the interior of the sky destroyer a few year ago (from memory). That in turn was inspired WWII submarine and destroyer interiors, as well as various bits of equipment that were in a factory I used to work in. The reactor is pretty cartoony, but the big glowing light is there to say "Hi, this is the important part" as well to put some creepy lighting on anyone in the compartment. The details have also been made oversized and simpler than the real thing would be- CG cartoon and all.