Should out to DRY411S as I used an interpretation of https://factorioprints.com/view/-KkH7gQIEcuri6zZBl_x for the refinery blocks. I wasn't able to get as many beacons on them as I had a constrained space to put them in, but either way, they're a key part to an entirely self sustaining Nuclear city block. They might get saturated with 238, but if you're using it elsewhere in your base that shouldn't be an issue. You'll likely want to kick start the koravex process but once it's going it should remain fairly consistent in its output. (it is bot fed, but the bots in the block as always are isolated to this block, so toss a couple dozen in one of the ports and they'll do their job.)
On with the actual Reactor itself. While the name of the print is due to it running 8 reactors, a happy coincidence in layout actually resulted in the reactors and storage tanks being laid out in an 8 shaped pattern. This is effectively a 2x2 reactor setup laid down twice. I was able to get the 4/48/83 ratio implemented so this block should output 960MW. I wanted to maintain my numbering location for my city blocks, so it took some playing around with the turbine orientations to not sit on top of that (The D1 in the northwest corner)
I have water feeds at the North and South. The water circuits are independent. I probably could have linked them with some creative piping, but I didn't want to clutter up the build more than needed. There are uranium and steel stations to the West and I placed the rocket fuel train stop to the east (all my blocks have their own fuel drops for trains). I do have two 4 tank trains separately feeding the north and the south, so 4 trains total for water. The Uranium and Iron Plate are just single car single engines as not much is needed.
You will probably notice as well that I have some water layouts in this blueprint. I am using the Noxys Waterfill mod but solely as a decorative feature. I'm not using that water to feed the tanks at all. You could easily do so if you want, or simply place this near by where some water is and pump directly into it. But as I'm using this as part of a city block build I didn't want to make it something you had to have a mod to effectively set up.
One thing this does not have, and it's due to my minimal knowledge of circuit networks, is any sort of network on the steam tanks themselves. I also don't have any circuit control over the inserters so it uses more fuel than it needs to as it will be constantly burning all 8 reactors even if demand doesn't require it. If someone wants to take a crack at implementing some of that on this, please feel free to reach out to me and I'd be happy to implement your updates to this blueprint.
Either way, I hope you enjoy this one. I'm fairly pleased with the way it turned out, and at nearly 1GW of output that's pretty nice for a city block.