It's hard to draw "heat" but i guess SS tab works. Maybe should recolor it or sumfin.
The first thing is the heatshield to increase maximum heatcapacity for the reactor.
Below that there are fans that cool themself. They get heat from the Heatoutlet or directly from the fuel rods.
After that are Coolant Cells. ATM they work like heat-storing-batteys.
The + shaped thing is "pipes" and distributes heat it recieved between adjecent items.
The Heatoutlet comes next, activly removing heat from the reactor to adjecent item (pipes, heat battery or to fans i.e.)
Last, the Capacitor. Automaticly sells 1% of the maximum moneystorage and increases max moneystorage.
I still need to work on the descritions. Will be clearer next shortly today or tomorrow.
Thank you for playing!