Went on another direction myself.
Having one big reactor that I will struggle to connect to enough water to cool it down is stupid, especially now that I know that you can only put 2000mB/t steam on a turbine.
I manage to create a cool-looking 9*9*9 reactor that output 111 000 mB/t but I can't imagine linking it to fifty turbines.
my new design is one reactor for 4 turbines, each turbine generating 28 000 Rf/t from the 2000 mB/t steam, and as many reactor that I care to build.
the reactor will be slim & tall, as it is a double core 3*3*14 DESIGN HERE
. Made it for the size (14 interior high so 16) & getting exactly 8000 mB/t output.
Turbines configuration is set (32 Ludicrite blocs as coil, running at around 7185 rpm, which is a resonance speed for max output), but dimension is yet to be done (trying to do a slim design too). more test to do.