Production of CO During Burnup of (Th, U)O sub 2 Encapsulated HTR Fuel Particles

摘要

The CO content of irradiated (Th, U)O sub 2 encapsulated HTR fuel particles has been measured by mass spectrometry. An evaluation of all the data thus obtained showed that the oxygen release, O/f, during irradiation is governed by thermodynamic equilibrium; O/f (atoms per fission) is a function of the irradiation temperature T(K), the initial Th/U-235 ratio N, and the burnup F (fissions per initial heavy metal atom). Within the limits of 1073