In the present paper, previously obtained CFD results concerning the behaviour of water walls introduced for passive cooling of containment systems of Small Modular Reactors (SMRs) are extended by sensitivity analyses. The targeted scenario concerns Station Black Out (SBO) conditions, in which the decay heat is transferred from the inner containment shell surface to the pool of the water-wall system. The work has been performed in the frame of the EU ELSMOR Project, having as main objective to design methods and tools for stakeholders to assess and verify Light Water Small Modular Reactor (LW SMR) safety when these reactors will be installed across Europe. The performed sensitivity analyses focus on the representation of turbulence and on the consequent heat diffusion in the water pool, by considering different turbulence models and numerical advancement schemes. A simplified model set up making use of the CATHARE 3 system code is also used to assess the overall observed behaviour. The additional knowledge of the addressed phenomena obtained by these new analyses allows drawing further conclusions on the behaviour of containments equipped with water-wall systems, to be adopted in European SMRs presently under development.
Sensitivity Analyses by a CFD Model on Water-Wall Behaviour in a LW SMR during SBO conditions
Alessandro De AngelisPrimo
Formal Analysis
;Walter AmbrosiniUltimo
Methodology
2023-01-01
Abstract
In the present paper, previously obtained CFD results concerning the behaviour of water walls introduced for passive cooling of containment systems of Small Modular Reactors (SMRs) are extended by sensitivity analyses. The targeted scenario concerns Station Black Out (SBO) conditions, in which the decay heat is transferred from the inner containment shell surface to the pool of the water-wall system. The work has been performed in the frame of the EU ELSMOR Project, having as main objective to design methods and tools for stakeholders to assess and verify Light Water Small Modular Reactor (LW SMR) safety when these reactors will be installed across Europe. The performed sensitivity analyses focus on the representation of turbulence and on the consequent heat diffusion in the water pool, by considering different turbulence models and numerical advancement schemes. A simplified model set up making use of the CATHARE 3 system code is also used to assess the overall observed behaviour. The additional knowledge of the addressed phenomena obtained by these new analyses allows drawing further conclusions on the behaviour of containments equipped with water-wall systems, to be adopted in European SMRs presently under development.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
