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Brayton completed Phase 1 of the design of the HTGL for Idaho National Labs. This facility will address the specialized needs… of the US gas-cooled reactors for the Next Generation Nuclear Power (NGNP) initiative.  Working with our
colleagues at INL, we have designed a major facility to test high-temperature, high pressure heat exchangers, helium circulators, valves and other critical components needed for the advanced NGNP.  Brayton is developing advanced
heat exchanger testing and analysis methods to verify the integrity of the components in extreme failure scenarios, and validate analytical life models.

The NGNP is to employ an inherently safe helium-cooled reactor composed of sub-millimeter fissionable fuel pellets encapsulated in silicon carbide and graphite.  In a loss of coolant accident, the equilibrium temperature of the pellets
remains safely below structural limits of the SiC /graphite sheath materials.  Moreover, unlike traditional water-cooled reactors, the coolant, helium, does not become radioactive.