2400 Fahrenheit is too hot
PS: 2400 Fahrenheit (=1316 Celsius) is too hot for the outlet temperature of even the hottest "high temperature reactor" design. While graphite, tungsten, and a few other materials can withstand those temperatures (if there is no oxygen present), under heavy neutron bombardment it has been shown that even the best high-temperature reactor containment system begins to leak fission products at around 1300-1500 Celsius. So the recommended maximum temperature for the most ambitious high temperature reactor designs is set near 1000 Celsius maximum. That is hot enough for many industrial processes including petroleum extraction from tar sands, but not hot enough for a steel blast furnace. I guess some applications were just not meant to be nuclear. Those darned neutrons! and pesky fission products too...
