In this paper, we present a reduced-order modeling approach to study the Molten Salt Fast Reactor (MSFR). Our approach is nonintrusive and based on the proper orthogonal decomposition method. We include adaptivity in selecting the sampling points both in time and parameter space. Steady-state and transient analysis were both performed using the developed models. | Progress in Nuclear Energy 140 2021 103909 Contents lists available at ScienceDirect Progress in Nuclear Energy journal homepage locate pnucene Analysis of the Molten Salt Fast Reactor using reduced-order models Fahad Alsayyari Marco Tiberga Zoltán Perkó Jan Leen Kloosterman Danny Lathouwers Delft University of Technology Faculty of Applied Sciences Department of Radiation Science and Technology Mekelweg 15 Delft 2629JB The Netherlands ARTICLE INFO ABSTRACT Keywords In this paper we present a reduced-order modeling approach to study the Molten Salt Fast Reactor MSFR . Our Proper orthogonal decomposition approach is nonintrusive and based on the proper orthogonal decomposition method. We include adaptivity Data-driven in selecting the sampling points both in time and parameter space. Steady-state and transient analysis were Adaptive both performed using the developed models. In the steady-state analysis we capture the effect of 30 model Molten Salt Fast Reactor parameters on the spatial distributions of fission power and temperature and on the multiplication factor. Uncertainty and sensitivity analysis Transient analysis The dimensionality of the fission power was reduced from the 104288 nominal dimensions in the physical space to 10 dimensions in the reduced space whereas the temperature was reduced from 220972 dimensions to 3. The reduced model was then used for uncertainty and sensitivity study of the maximum temperature in the reactor and the multiplication factor. In the transient analysis the reduced model captured the effect of perturbations in the flow rate of salt in the intermediate circuit on the fission power density and temperature. The reduced models were successfully tested on a set of points that were not part of the snapshots used during the construction stage. 1. Introduction configurations Cacuci 2003 . For example automatic differentiation tools can be used to sample the forward model and reconstruct a Molten salt reactors have
