Analysis of Fission Product Distribution and Composition in the TRISO Layers of AGR-2 Fuel
By:
Gerczak, Tyler J; Hunn, John D; Morris, Robert N; Montgomery, Frederick C; Skitt, Darren J; Baldwin, Charles A; Dyer, John A; Eckhart, Brian D
Journal Name:
International Conference on High Temperature Reactor Technology (HTR)
Page Number:
48
Volume:
9
Issue Number:
N/A
Publication Date:
November 9, 2023
Conference Name:
International Conference on High Temperature Reactor Technology (HTR 2018)
Conference Location:
Warsaw, Poland
Conference Sponsor:
National Center for Nuclear Research - Poland
Abstract
The Advanced Gas Reactor Fuel Qualification and Development Program's second irradiation experiment focuses on the performance of fuel particles produced in an industrial-scale coating system. Ongoing post-irradiation examination efforts include exploration of tristructural-isotropic (TRISO)-coated particle fuel in the as-irradiated state and subjected to elevated temperatures to simulate accident conditions (safety-testing). Scanning electron microscopy (SEM) analysis with energy dispersive x-ray spectroscopy (EDS) was used to show the distribution of fission products within the TRISO layers. The SEM analysis showed a variation of fission product distribution within the TRISO layers based on irradiation temperature, burnup, individual particle fission product inventory retention, safety testing history and kernel composition. A primary observation is that particles which likely experienced higher temperature showed a greater diversity and distribution of fission products and actinides in the IPyC and SiC layers, implying temperature is a dominant variable influencing the transport of radionuclides in TRISO particles.
