b'The AFC-3 and -4 campaigns have focused on advanced metallic fuel concepts focusing largely on two objectives including fuel design modifications able to 1) perform well without fuel-to-cladding bond sodium (thus enabling direct disposal fuel cycles) and 2) mitigate the life-limiting phenomena associated with fuel cladding chemical interaction (FCCI). The former of these objec-tives has focused development on the use of annular fuel geometries in close contact with the helium-filled cladding where the latter of these objectives has focused developments both on the use of FCCI-mitigating cladding internal liners and the use of fuel alloy additives which tend to react and form stable intermetallic with lanthanides. Most of the AFC-3 specimens, and some of the AFC-4 specimens, have already competed their planned irradiation. Presently the AFC-3F, -4B, -4C, and -4D sub-campaigns are undergoing irradiation. Another irradiation campaign is also underway in concert with the Korean Figure 2. PIE image of lowand ceramic fuels types. One of theAtomic Energy Research Institute burnup annular fuel specimensmajor accomplishments of the AFC-1(KAERI) via the joint fuel cycle study from AFC-3D. and -2 campaign showed the relativecooperative research and development insensitivity of fuel performanceagreement. This campaign is the first when adding actinides to metal fuelsphase of the Integral Recycling Test for the purpose of transmuting them(AFC-IRT1) irradiation experiment and greatly reducing radiotoxicity ofpurposed to exhibit fuel performance spent fuels. of metal fuels which were produced in 202 2019|AFC ACCOMPLISHMENTS'