TY - BOOK
T1 - Oxidation of Matrix Material in Helium with Varied Moisture Content
AU - Gerczak, Tyler J.
AU - Contescu, Cristian I.
AU - Lee, Jo Jo
AU - Mee, Robert W.
AU - Schumacher, Austin T.
AU - Stempien, John
AU - Trammell, Michael P.
PY - 2019
Y1 - 2019
N2 - Exploration of the oxidation behavior of matrix material from tristructural-isotropic (TRISO) coated particle fuel elements in moisture environments provides critical data needed to predict the material’s response during off-normal accident scenarios. Near-representative, matrix-only samples were fabricated to facilitate oxidation testing in varied moisture concentrations. Oxidation testing was completed over a range of temperatures and oxidizing environments to obtain the relevant oxidation kinetics parameters and empirical oxidation rates necessary to better predict and understand matrix oxidation behavior at relevant conditions. The acquired oxidations rates were fit to established models for steam oxidation of nuclear graphite, and data were acquired following an established process. The data showed good agreement over conditions typical of the kinetic regime, and they showed a departure from the kinetic model fit at elevated temperatures and steam partial pressures in helium carrier gas. The departure was confirmed to be due to the experimental conditions being beyond the kinetic regime based on destructive analysis.
AB - Exploration of the oxidation behavior of matrix material from tristructural-isotropic (TRISO) coated particle fuel elements in moisture environments provides critical data needed to predict the material’s response during off-normal accident scenarios. Near-representative, matrix-only samples were fabricated to facilitate oxidation testing in varied moisture concentrations. Oxidation testing was completed over a range of temperatures and oxidizing environments to obtain the relevant oxidation kinetics parameters and empirical oxidation rates necessary to better predict and understand matrix oxidation behavior at relevant conditions. The acquired oxidations rates were fit to established models for steam oxidation of nuclear graphite, and data were acquired following an established process. The data showed good agreement over conditions typical of the kinetic regime, and they showed a departure from the kinetic model fit at elevated temperatures and steam partial pressures in helium carrier gas. The departure was confirmed to be due to the experimental conditions being beyond the kinetic regime based on destructive analysis.
KW - 36 MATERIALS SCIENCE
KW - 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
U2 - 10.2172/1606910
DO - 10.2172/1606910
M3 - Commissioned report
BT - Oxidation of Matrix Material in Helium with Varied Moisture Content
CY - United States
ER -