Revisiting Temporal Accuracy in Neutronics/T-H Code Coupling Using the NURESIM LWR Simulation Platform

Abstract

The first part of this paper reviews the different temporal coupling methodologies that are currently employed for the transient simulation of LWR cores. The second part shows preliminary results from the implementation of some suggested coupling improvements, including high-order corrections to the exchanged coupling fields and a dynamic time step control technique, for the simulation of an exemplary reactivity insertion transient analysed using the European NURESIM LWR simulation platform.