we are two doors from being able to malfunction it.
Not quite sure what you mean? I'm trying to work out which "two doors" you're referring to? Do you mean once you're inside there's one door to the reactor chamber, then you cross the wooden planks and there's one more door to the reactor main control panel?
All of the "gaps" between rooms and/or corridors can be blocked by a door tile... e.g. if you're trying to get from the road to the reactor main control panel, there could be at least 6 doors to get through...
Do you think I should put in some kind of an "airlock" security thingy BEFORE you get into the reactor room?
Let me know.