Multi-physics calculations of FFTF loss of flow without scram transient: impact of neutronics and thermomechanics on CATHARE3 models - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Multi-physics calculations of FFTF loss of flow without scram transient: impact of neutronics and thermomechanics on CATHARE3 models

Résumé

Thermal hydraulics computational codes used for the design studies and safety assessment of sodium fast reactors need to be able to model a large scope of scales and physical phenomena. IAEA’s Coordinated Research Project on the Fast Flux Test Facility (FFTF) sets a landmark for the validation of such codes by providing precious experimental data on a reactor scale. The transient under consideration is the Loss Of Flow WithOut Scram (LOFWOS) in which the primary circuit undergoes a forced to natural convection transition after the primary pumps trip. In order to predict this transient correctly, thermos-hydraulic codes need to take into account various time and dimension scales as well as interaction with other physics (such as neutronics and thermo-mechanics). Neutronic feedbacks, power distribution, Pellet Cladding Mechanical Interaction (PCMI) and fuel thermal behavior have been calculated based on FFTF’s fuel composition using CEA in-house codes, namely PARIS/ERANOS for neutronics and GERMINAL V2 for thermo-mechanics. Results from these codes are given to CATHARE3 thermal-hydraulics system code. This paper presents the impact of neutronics and themo-mechanics inputs on a system scale calculation.
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Dates et versions

cea-04374219 , version 1 (05-01-2024)

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  • HAL Id : cea-04374219 , version 1

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Simon Li, Sophie Bajard, Zheng Zhang, Alain Conti, Pierre Sciora, et al.. Multi-physics calculations of FFTF loss of flow without scram transient: impact of neutronics and thermomechanics on CATHARE3 models. 19th international topical meeting on Nuclear Reactor Thermal Hydraulics (NURETH 19), Mar 2022, Brussels (virtual), Belgium. ⟨cea-04374219⟩
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