For the first time, a **United States research team has uncovered detailed internal behavior of TRISO nuclear fuel using advanced neutron-based analysis. TRISO fuel consists of tiny uranium kernels coated in multiple protective ceramic layers, designed to withstand extreme temperatures without melting or leaking radiation. The experiments were carried out using the Oak Ridge National Laboratory’s Spallation Neutron and Pressure Diffractometer, which allows scientists to observe atomic-level stru