b'Figure 3. Images of MITRs water looptestbed. A quick summary of thehigh fluence capabilities. (Figure 2)and cladding test holder accomplishments from this first era Irradiation testing of cladding tubes are listed below: to assess corrosion of ATF claddingIrradiation testing of numerousconcepts using MITRs pressurized ATF fuel and cladding conceptswater loop. This loop capability using insert gas capsule (referredcontinues to be used and is now to as ATF-1) and pressurizedthe subject of a Nuclear Energy water loop testing of several fuelUniversity Partnership (NEUP) rodlets (referred to as ATF-2)call for proposals to continue with in the ATR. These capabilities werefurther ATF cladding behavior commissioned for ATF program,research. (Figure 3)have tested fuel technologies from Transient testing of ATF fuel and all major US fuel vendors, andcladding concepts in inert gas and continue to be used today withwater capsules in TREAT under new test planned for internationalconditions simulating Reactivity-partners as well. (Figure 1) Initiated Accidents (RIA). This effortAccelerated, separate-effectsnot only entailed development of irradiation capsules for testing smallentirely new irradiation capabilities specimens of ATF fuels and materialsbut was crucial connected to partner in the HFIR. These capabilitiesproject which refurbished and continue to be sought by therestarted the TREAT reactor which community owing to HFIRs unique 18 2021|AFC ACCOMPLISHMENTS'