Coupled thermal and physico-chemical analysis of multicomponent oxidic melt solidification

• Autorzy: Journeau C. , Sudreau F. , Ramacciotti M. , Cognet G.
• Konferencja: International Conference on Heat Transfer and Transport Phenomena in Multiphase Systems HEAT '99 (2; 18-22.05.1999; Kielce, Poland)
• Języki publikacji: EN

Abstrakty

EN

The solidification of multicomponent melts with large solidification ranges, such as corium-concrete mixtures is studied. A methodology to estimate relevant physical properties from a thermodynamical computation is presented and applied to an experiment performer in the VULCANO facility. A thermal analysis provides the orders of magnitude of the solidification kinetics for the observed microstructures. Various phenomena in which physico-chemistry is coupled with heat transfer are described : the corium rheology, which affects convection, depends on the physico-chemistry and on the cooling rate; the density gradients which cause natural convections are strongly dependent of the solidification rate; solidification at the substratum contact creates a large thermal contact resistance which reduces sharply heat transfer at this interface.

Słowa kluczowe

EN

solidification; corium; physicochemistry; coupling; viscosity

• Wydawca: Wydawnictwo Politechniki Świętokrzyskiej
• Czasopismo: Zeszyty Naukowe Politechniki Świętokrzyskiej. Mechanika
• Rocznik: 1999
• Tom: Z. 67
• Strony: 265--274
• Opis fizyczny: Bibliogr. 17 poz., rys., wykr.

Twórcy

autor

Journeau C.

• Commisariat à l'Energie Atomique, CEA/Cadarache, Direction des Réacteurs Nucléaires, BP 1, 13108 St Paul lez Durance Cedex, France

autor

Sudreau F.

• Commisariat à l'Energie Atomique, CEA/Cadarache, Direction des Réacteurs Nucléaires, BP 1, 13108 St Paul lez Durance Cedex, France

autor

Ramacciotti M.

• Commisariat à l'Energie Atomique, CEA/Cadarache, Direction des Réacteurs Nucléaires, BP 1, 13108 St Paul lez Durance Cedex, France

autor

Cognet G.

• Commisariat à l'Energie Atomique, CEA/Cadarache, Direction des Réacteurs Nucléaires, BP 1, 13108 St Paul lez Durance Cedex, France