Comparison of REXCO code predictions with flexible vessel experiments

Abstract

This paper deals with the REXCO code predictions of the flexible vessel tests. Comparisons are made with the data from experiments which were designed specifically for the purpose of code verification and/or modification. These experiments were performed with a well-defined and calibrated energy source in cylindrical vessel with precision tolerances and simple well-defined boundary conditions. The experimental data can thus be used as reliable test data for validation of computer codes, as well as of the modeling techniques used in the computer analysis. The inputs to the computer analysis are the vessel and core barrel dimensions and boundary conditions, the stress-strain relationships for the vessel and core barrel materials, the equation of state for the coolant, and the pressure-volume relationship of the energy source. The REXCO-predicted wall deformations, pressure loadings, and integrated impulses at various gauge positions are compared with the experimental data. Results of the comparisons are discussed.