I have no idea how nuclear power works in this game, but I assume space for belts, boxes and inserters is an issue in some way. Seems this mod allows for some very nice setups. I liike
well, it might help abit, but far as i know you only need like 4 or more reactors in same heatnetwork, so with abit creative use of heat pipes, it can easi be done without it... if you want some idea on how it works, i suggest you take a look at this tutorial on the subject, found it helpfull... https://www.youtube.com/watch?v=Q_Eh7sz1Pik