Started another world. I do that a lot.
Here's my power area; it comprises three small underground rooms right now.
First room is a ReactorCraft fission reactor. You can see that it is chunkloaded and has its own water supply. I cheesily vent waste into a garbage can for now.
From above you can see I'm using 7 reactor cores at the moment. I used to use 9, but I found I could get by with fewer by surrounding them with Neutron Reflectors. So, what you're seeing is 7 cores surrounded by boilers, surrounded in turn by reflectors, with steam being pumped out the top of the boilers.
This is where the steam goes. Its driving a single turbine at the moment; I doubt I'm creating enough steam for more but who knows. Steam is condensed above and voided purely to mitigate lag, which is considerable otherwise. The power fluctuates madly but seems to be on average around 930MW. Bedrock shafts take the power to the next room.
So far all we have here is a simple Aurora battery. I say simple, but it honestly took hundreds of diamonds to make.
It also holds an absurd amount of power (around 50 billion RF if you're curious. Billion with a B.) The reactor is increasing that last "Stored Energy" digit about 1 per second (since we're generating nearly a GW). Power goes up out of the power corridor into the base proper.
We're not doing a ton with the power yet; I'm currently tearing down tons of obsolete infrastructure and re-wiring the base. This is basically what the utility halls will look like (2 machines wired so far)
What you see is an electricraft wire exiting the power room below and connecting to machines via a few gidgets.
First it hits a resistor, which ensures I'm not sending more power to a given machine than I want to. The closest one is receiving around 2GW, the second one 16GW.
Second it his a relay, which lets me disconnect power completely when I don't want to use it. Both machines are currently connected to a ExpandedRedstone "Chest Reader", which is outputing a signal when their inventory is empty (ie, they have no work to do). This in turn gets inverted via NOT gates and flips the relay. This lets me power a machine by giving it work.
Well, back to it.