FHRs have the potential to safely and reliably generate large quantities of power at lower cost than any other nuclear reactor class. The United States has attempted to develop non-light-water-cooled reactors since the 1950s. None have succeeded on a sustained basis in the commercial market despite long-term, substantial government funding. Light-water-cooled reactors (LWRs) are a reliable, mature reactor technology with an established cost and performance basis. Even LWRs, however, supply only ~20% of US electricity and only ~8% of total US energy. The most significant issue inhibiting the growth of nuclear energy in the United States is the high cost of available LWR reactor options (compared to the current cost of natural gas) combined with an output temperature considerably lower than that needed to support many industrial process heat uses.