Saw a number of people posting their reactors - felt like sharing my most recent build. Primary goal was for it to be chunk aligned and tileable. End result was this 2x2 chunk square design.

If I recall it's roughly ratio'd appropriately, except for an excess of turbines due to the demands of symmetry and aesthetics (can support up to ~600 MW until the steam buffer runs low; then just standard 480 MW for a 4 reactor setup). Also reads the reactor temperature to only add fuel when needed; blinking mood-lights; and some other features.

Caveats of this build are that it requires logistics-system/logistics-robots, and is intended to be built directly over water (though there is space to pipe it in around the edges).

Blueprint forthcoming if/when I can figure out how to share it.