DEVELOPMENT AND VERIFICATION OF PERTURBATIVE METHODS IN THE APOLLO3? CODE: Sensitivity analysis and uncertainty quantification applied to pressurized-water and sodium fast reactors

摘要

Perturbation theory and the associated methods are powerful tools for reactor physicsanalysis such as uncertainty quantification, numerical biases, feedback coefficients calculationamongst others. The goal of this paper is to present the recent implementation ofstandard, equivalent generalized and generalized perturbation theory in the APOLLO3?neutronic platform developed at CEA. These developments have been tested through perturbative/sensitivity calculations on different physical systems: the KAIST 1A core, apressurized-water reactor benchmark and the sodium-cooled fast reactor, ASTRID, studiedat CEA. These calculations have been verified using direct perturbations.