Deterministic And Stochastic Analysis of The Isotopic Composition of Highly Burned MOX Fuel

The accurate prediction of irradiated MOX fuel composition is important for fuel assembly design, core physics analysis, and a variety of reactor safety and licensing applications. The accuracy of the CASMO-4 lattice code in predicting the isotopic inventory of high-burnup MOX fuel was tested through comparison with detailed Monteburns Monte Carlo code calculations and ARIANE experimental data. The Monteburns analysis was performed using one-, two- and three-dimensional models, JEF-2.2 nuclear data, and a cycle-averaged irradiation history. Good agreement was obtained with CASMO-4 predictions for key fissile isotopes and fission products. (author)