b'Preparations to Add GE Rodlets to ATF-2Principal Investigator: Connor Woolum, INLTeam Members/ Collaborators: Brian Durtschi and Gary Hoggard (INL); Global Nuclear Fuels (GNF); GeneralElectric Global Research (GERC)Figure1. Radiographic image of GE fuel rodlets.Twelve ATF fuel rodletsT The ATF-2 test train currently contains he Accident Tolerant Fuels (ATF) Program inserted theover two dozen fuel rodlets undergoing fabricated by GNF infirst test train into the Advancedirradiation testing within the 2A a collaborative effortTest Reactor (ATR) at Idaho Nationalloop of ATR. Several of these rodlets among GNF, GE, and INLLaboratory (INL) in 2018 in supportare planned to be removed from the were received at INL inof testing novel concepts designedtest train after ATR Cycle 164A and preparation for insertionto enhance the accident tolerance ofreplaced with General Electric (GE)/in ATR Cycle 166B. light water reactor (LWR) fuels. As aGlobal Nuclear Fuels (GNF) concepts follow-on to the initial ATF-2 insertion,with enhanced accident tolerance. These continued collaboration with industryconcepts include both coated cladding partners has resulted in plans to irradiateconcepts and novel FeCrAl cladding additional ATF concepts as part of thematerials, paired with UO 2fuel. In ATF-2 campaign. addition to these novel concepts, rodlets Project Description: representative of a standard Boiling Irradiation testing of ATF candidateWater Reactor (BWR) fuel pin are concepts in prototypic environments isincluded in the test matrix to serve as pivotal to understanding performancereference specimens.of the fuel-cladding system and alsoIrradiation testing of these ATF concepts to support future fuel licensing effortswithin ATR will enable a more thor-for commercial use. The ATF programough understanding of their irradia-has supported irradiation testing oftion performance and behavior. This concepts driven by industry partnersincreased understanding and perfor-since its inception and continues to domance data is critical both for licensing so through a variety of in-pile and purposes and also to continue efforts out-of-pile testing. focused on further enhancing the safety of fuel-cladding systems for current and future commercial nuclear reactors.98 2019|AFC ACCOMPLISHMENTS'