b'Figure 1. Illustrations of TWIST capability simulating loss of coolant accident conditions on a test rod in TREATdisassembly sequence which wasrelevant for FFRD. The capsule is incorporated into the final in-reactordesigned with modular adaptability version of the design. All of theto allow cost effective modifications engineering documents and design/ as needed in the future. A few safety analysis was completed forconceptual-level design efforts are the TWIST capsule to encompassnow underway, primarily through the conditions needed for a series ofstudent-led senior design projects, to fresh fuel commissioning test rods.determine the best path for bolt-on These commissioning tests, whichmodifications to TWIST. Theseare planned to begin next year,adaptions will help simulate other encompass some aggressive condi- conditions and behaviors of interest tions and thus this safety analysissuch as pre-blowdown forced package is expected to envelopeconvection with a small motor/many of the conditions needed forimpeller device, post-blowdown steam previously irradiated high burnupcomposition control, and alternate tests that will follow. The first- instrumentation packages focused generation TWIST instrumentationon transient fission gas release.and analysis package is focused on simulating and measuring behaviors 2022|AFC ACCOMPLISHMENTS 143'