My starter thorium design to get early money. I start making them as soon as I unlock thorium (without the tanks and turbines and upgraded cooling stacks) and then add stuff in as I unlock it.

A design where the plutonium cores are surrounded by the water pumps.

Also here's turbines powered off the steam they produce just for fun. I juggle it for a while then just let the runaway reaction happen at the end and let it all explode. (The righthand part is just to jumpstart it)

Here's 130,000 mW

90,000 mW with 4 sodium cores.  Looks like a microchip or something.

I guess the thorium core build is pretty microchippy as well.

Christmas colors can get you 100,000. Merry Early Christmas.