Abstract
The Fast REactor NEutronics/Thermal-hydraulICs (FRENETIC) code has been developed during the last years at Politecnico di Torino, implementing a full-core coupled neutronic/thermal-hydraulics model for steady-state and transient analysis of liquid-metal cooled fast breeder reactor (LMFBR). In the framework of the validation activities for the code, an analysis of the sodium-cooled reactor EBR-II, previously carried out in the frame of a IAEA Coordinated Research Project, is performed with FRENETIC including the most recent physics models. In particular, photon transport and heat deposition are taken into account, a feature which has been proved in previous studies to be relevant to the correct study of the EBR-II core. To this purpose, a set of nuclear data for photons has been generated by means of the Monte Carlo code Serpent-2, and it is demonstrated that the code is able to take into account the photon heat deposition in the EBR-II.
Highlights
Liquid-metal fast breeder rectors (LMFBRs) are innovative systems, belonging to Gen-IV reactors, that utilize liquid metal as coolant for its capability to extract great quantity of power, together with its low interaction rate with high energy neutrons, allowing the establishment of a fast neutron spectrum
The Fast REactor NEutronics/Thermal-hydraulICs (FRENETIC) code has been developed during the last years at Politecnico di Torino, implementing a full-core coupled neutronic/thermal-hydraulics model for steady-state and transient analysis of liquid-metal cooled fast breeder reactor (LMFBR)
A set of nuclear data for photons has been generated by means of the Monte Carlo code Serpent-2, and it is demonstrated that the code is able to take into account the photon heat deposition in the Experimental Breeder Reactor-II (EBR-II)
Summary
Liquid-metal fast breeder rectors (LMFBRs) are innovative systems, belonging to Gen-IV reactors, that utilize liquid metal as coolant for its capability to extract great quantity of power, together with its low interaction rate with high energy neutrons, allowing the establishment of a fast neutron spectrum. The validation activity performed in the frame of an IAEA Coordinated Research Project (CRP) on the Experimental Breeder Reactor-II (EBR-II) has highlighted the necessity to include in the simulation capabilities of the coupled code some additional physical phenomena such as presence of the photon and decay heat source. To this aim, a new module has been added, exploiting the modelling similarities to the neutronic module, for the photon production and transport, here modelled with the same diffusive approach as for neutrons [4]
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