My preferred model is that reactors 1 and 2 are located in the nacelles and reactor 3 is in the engineering hull. These are the three M/AM reactors for the ship. There are additional fusion reactors to power the impulse drive and auxiliary power.
The M/AM drives have to run as a set, with the central reactor (No. 3) being the less powerful one, but needed to provide a timing coordination between the two main reactors in the nacelles. So, sabotaging this central reactor can disable the whole system. This allows for repeated references both on screen and behind the scenes to the nacelles being the main "power pods" where the bulk of the energy come from.
This fits into the ENT-TNG continuity by saying that the NX class technology allowed for a central reactor to power all the systems, but over the years, the engine technology of the 23rd Century outpaced the reactor technology and multiple, distributed reactors are needed to provided the necessary power. But by the refit-era, reactor technology was catching up and the choice was made to go back to the one main reactor set-up.
How this fits in to the STD continuity is not my problem as I don't accept that series as Prime Universe and don't see that it needs to fit in.
--Alex
The M/AM drives have to run as a set, with the central reactor (No. 3) being the less powerful one, but needed to provide a timing coordination between the two main reactors in the nacelles. So, sabotaging this central reactor can disable the whole system. This allows for repeated references both on screen and behind the scenes to the nacelles being the main "power pods" where the bulk of the energy come from.
This fits into the ENT-TNG continuity by saying that the NX class technology allowed for a central reactor to power all the systems, but over the years, the engine technology of the 23rd Century outpaced the reactor technology and multiple, distributed reactors are needed to provided the necessary power. But by the refit-era, reactor technology was catching up and the choice was made to go back to the one main reactor set-up.
How this fits in to the STD continuity is not my problem as I don't accept that series as Prime Universe and don't see that it needs to fit in.
--Alex