Heat-transport-system experience

The FFTF Heat Transport System (HTS) transfers the reactor heat output to sodium coolant circulating in the primary system. Heat is transferred into the secondary loops which ultimately rejects the heat through sodium-to-air heat exchangers to ambient air. The System Configuration uses three parallel primary and secondary cooling circuits. Each primary circuit includes a free-surface circulating pump, an intermediate heat exchanger and a check valve; the secondary circuit includes the intermediate heat exchanger, four Dump Heat Exchangers (DHXS) with isolation valves, a free surface circulating pump and an expansion tank. Each circuit is rated at 133 MWt to give a total cooling capability of 400 MWt. During the power demonstration tests the primary hot leg operating temperature was 9380F