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Hydrogen Safety – Ecart And Melcor Modeling

pubblicazioni - Memoria

Hydrogen Safety – Ecart And Melcor Modeling

Sintesi dei modelli di deflagrazione veloce delle miscele idrogeno – aria sviluppati per permettere al codice ECART di simulare incidenti con rilascio ed esplosione di idrogeno.

Safety of hydrogen is inherent to both conventional and nuclear sectors and its challenges are very different such as production, easy leaking, low-energy ignition, wide range of fuel-air mixtures flammability limits, metals embrittlement, explosion. About nuclear power plants, the Fukushima Dai-ichi NPP accident of 2011 further highlighted the importance of these phenomena. This work is focused on modeling of hydrogen – air fast deflagrations, as they are some of the most significant phenomena in case of hydrogen leakages in both conventional and nuclear power plants accident scenarios. In particular, the paper describes the modeling of this phenomenon finalized to improve ECART numerical tool (lumped parameters code dedicated to the simulation of accidental scenarios), enabling it to analyze accident scenarios with hydrogen explosions. A first validation of improved ECART code is currently in progress by means of comparison with results of other computational tools simulations like MELCOR and experimental data coming from the FP5 SAFEKINEX research project.

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