Regarding Reactorcraft, I'm excited about the turbine flywheel. I am concerned that the steam is eliminated.
How should that work with ammonia? Also I'm on a finite water world, so I'm actually recycling my steam
Lastly, you might consider a Reactorcraft suggestions thread. I didn't see one.
If you're looking to even out the power generated by a turbine without a flywheel, I would just use electricraft with a buffer auroral battery (or 4 if you want 1 GW output). It also lets you capture every bit of power produced from your reactor so you don't have to worry about waste. Just make sure the wire between the generator and battery is short since the fluctuations from the generator cause too many network updates for a long wire system. The output from the buffer battery is stable though so you can run your long-distance wires from that.