MULTI-DIMENSIONAL APPROACHES IN SEVERE ACCIDENT MODELLING AND ANALYSES

  • Fichot, F. (Institute de Radioprotection et de Surete Nucleaire Direction de la Prevention des Accidents Majeurs) ;
  • Marchand, O. (Institute de Radioprotection et de Surete Nucleaire Direction de la Prevention des Accidents Majeurs) ;
  • Drai, P. (Institute de Radioprotection et de Surete Nucleaire Direction de la Prevention des Accidents Majeurs) ;
  • Chatelard, P. (Institute de Radioprotection et de Surete Nucleaire Direction de la Prevention des Accidents Majeurs) ;
  • Zabiego, M. (Institute de Radioprotection et de Surete Nucleaire Direction de la Prevention des Accidents Majeurs) ;
  • Fleurot, J. (Institute de Radioprotection et de Surete Nucleaire Direction de la Prevention des Accidents Majeurs)
  • 발행 : 2006.12.01

초록

Severe accidents in PWRs are characterized by a continuously changing geometry of the core due to chemical reactions, melting and mechanical failure of the rods and other structures. These local variations of the porosity and other parameters lead to multi-dimensionnal flows and heat transfers. In this paper, a comprehensive set of multi-dimensionnal models describing heat transfers, thermal-hydraulics and melt relocation in a reactor vessel is presented. Those models are suitable for the core description during a severe accident transient. A series of applications at the reactor scale shows the benefits of using such models.

키워드

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