Simulation of a TRISO MiniFuel irradiation experiment with data-informed uncertainty quantification

UCO TRISO Minifuel FY23 NSUF-Kairos Power Post-Irradiation Examination Status Report

“…The six passive SiC TMs were analyzed in LAMDA via dilatometry [8] to confirm the corresponding subcapsules irradiation temperature. The average TM temperature obtained via dilatometry was compared to the predicted average TM temperature at the end of irradiation (EOI) from the as-built as-irradiated numerical calculations (see Table 7 in Gorton et al [4]). Figure 5 shows the corresponding results.…”

“…The Cs-137 and Cs-134 activities were recorded and used to estimate the experimental burnup of the fuel specimens. The experimental burnup was compared to the predicted burnup from the as-built, as-irradiated calculation [4], and the results are reported in Table 1.…”

“…The MiniFuel irradiation capability [2] was used for irradiation of the fuel compacts in a vertical experiment facility (VXF) in ORNL's High Flux Isotope Reactor (HFIR). The experimental design is detailed in Gallagher et al [3], and the irradiation vehicle is represented in Figure 1 [4]. Each MiniFuel subcapsule contains one fuel compact.…”

“…This report describes the subsequent post-irradiation examination (PIE) results collected to date on the KP MiniFuel targets. Table 1 presents the subcapsule details for each target: the time-and volume-averaged SiC layers' target irradiation temperature, the subcapsule IDs, the irradiation position in the MiniFuel irradiation basket, the type and ID of the fuel compacts, and the discharge burnup predicted by numerical calculations [4]. One should note that the subcapsule ID does not always match the radial-axial-subcapsule (R-A-S) irradiation position in the MiniFuel basket.…”