I made a 12 core Reactorcraft HTGR Reactor. 160k RF/t. I could possibly get more if I used another turbine. ^.^
you probably need another 4-5 turbines.
my "little" 8-core pebblebed feeding two heat exchangers and 4x6 boilers will feed 4 small turbines at near max, with some steam buildup. ~3.8-4.0 GW.
dumping all four groups into a HP turbine shows its true output is actually ~4.2GW, or roughly
750K RF/t. HP turbine and turbine generator FTW!!!
heres what one layer looks like.
O-insulating block
C-core
A-air or whatever.
E-exchanger
AAOAA
AOCOA
OCECO
AOCOA
AAOAA
stack two of these layers on top of each other. hook up the fuel, waste, and CO2 lines. rock out to more power than you can shake a gear at.
make sure all exposed edges of the cores, boilers, and exchangers are covered. any block or pipe serves this purpose, so the top and bottom of the boilers along with 5 edges of the exchanger are covered. the last edge will be covered when insulating the boilers.
as shown here:
AOOAOOAOOAOOA
OBBOBBOBBOBBO
OBBEBBOBBEBBO
OBBOBBOBBOBBO
AOOAOOAOOAOOA