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Coupled neutronics and thermal-hydraulics transient calculations based on a fission matrix approach: application to the molten salt fast reactor

A. Laureau 1 M. Aufiero 1 P.R. Rubiolo 1 E. Merle-Lucotte 1 D. Heuer 1
1 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
Abstract : This work presents a time dependent version of the fission matrix method named Transient Fission Matrix (TFM) developed to perform kinetics calculations. Coupled neutronics and thermal-hydraulics transient calculations are studied using the TFM approach and a Computational Fluid Dynamics (CFD) code. The generation of the matrices is performed using the Monte Carlo neutronic code SERPENT beforehand the transient calculation. The neutronic module and the coupling are directly implemented in the CFD opensource code OpenFOAM. An application case is presented on the Molten Salt Fast Reactor (MSFR). This system is a circulating liquid fuel reactor characterized by a two meter core cavity and a fast spectrum. Thus the present approach is well suited since an accurate distribution of the velocity of the liquid fuel circulating in the cavity and of the delayed neutron precursor transport is required. A reactivity insertion incident of around 2.5$ is presented, showing the good behavior of the MSFR in such a case. A load-following from 50% to the nominal power generation is also discussed
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Conference papers
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http://hal.in2p3.fr/in2p3-01176258
Contributor : Emmanuelle Vernay <>
Submitted on : Wednesday, July 15, 2015 - 10:58:04 AM
Last modification on : Thursday, November 19, 2020 - 12:58:40 PM

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  • HAL Id : in2p3-01176258, version 1

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A. Laureau, M. Aufiero, P.R. Rubiolo, E. Merle-Lucotte, D. Heuer. Coupled neutronics and thermal-hydraulics transient calculations based on a fission matrix approach: application to the molten salt fast reactor. Joint International Conference on Mathematics and Computation, Supercomputing in Nuclear Applications and the Monte Carlo Method (M&C + SNA + MC 2015), Apr 2015, Nashville, United States. ⟨in2p3-01176258⟩

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