Abstract

This work presents the current state and the next stages in the development of the modified code OpenMC(TD), a modified version of the Monte Carlo code OpenMC which includes the time dependence related to the emission of ?-delayed neutrons, but instead of simulating these neutrons using the traditional 6-group structure, features an implementation where individual precursors decay. This code is in active development, but already shows promising results. The upcoming development stages for OpenMC(TD) have two complimentary aspects, one related to the Monte Carlo code and another related to experimental measurements at a research nuclear reactor. Regarding the code, it is planned to implement the branchless collision variance reduction technique, while to validate the simulations, transient experiments will be performed at the RECH-1 research nuclear reactor. © The Authors, published by EDP Sciences.