That also assumes, though, that baffle plates are "Starship" equipment, not something more likely found on older or smaller types of vessels. I don't believe the term is ever used with regard to Enterprise, nor is she referred to as having an "energy pile" like Antares. The Starship Republic 1371 did have "atomic matter piles," but the absence of that terminology for Enterprise gives it the feel of an older technology.
Though later sources in the 70s would describe the impulse engines as using atomic power. Maybe in TMOT, too?
Anyway, baffle plates are used on "Class J" starships, at the very least.
