Remydon

I'm having an issue with the radiators in KSPI, it seems that I am only getting about 10% of the performance I should be. Example; I'm trying to build a power station with a molten salt reactor and a thermoelectric generator, both 3.75m size. Total heat production in thermal helper is 5.79 GW. I'm trying to cool this with large folding radiators, which I believe are upgraded to Mk IV (any way to check this?). The tool tip says one of these should provide 2868 MW of cooling at Mk IV, but thermal helper says I'm only going to get 310 MW of cooling. Any reason for the discrepancy? I know near Future mods can interact with KSPI stuff, but I don't have any installed. If the stats I'm reading are correct, I will need 24 of these radiators to cool a 3.75m molten salt station. That seems absurd, and I'm not sure how I will realistically handle stations that generate more heat as I progress.....Any suggestions?