Final Interpretation Report of the PHEBUS test FPT0: Bundle Aspects

In this paper, the actual status of understanding of the dominant bundle degradation processes is presented. Here, mainly the results reported in the last years in the Bundle Interpretation Circles organised by JRC/IE and IRSN (Institut de Radioprotection et de Surete Nucleaire, Cadarache) are summarised. For the extensive and detailed computational analyses the commonly used severe accident codes such as ICARE, MELCOR, SCDAP/RELAP and ATHLET-CD are used. For the analysis of fission product release from the FPT0 bundle, specific codes such as SVECHA and XMPR were used as well.JRC.F.4-Nuclear design safet

Core Loss during a Severe Accident (COLOSS).

Abstract not availableJRC.F-Institute for Energy (Petten

Core Loss During a Severe Accident (COLOSS)

The core loss during a severe accident (COLOSS) project was a 3-year shared-cost action, which started in February 2000. The project is concerned with the consequences that core degradation, occurring under severe accident conditions, may have on H2 production, melt generation and the source term. Unresolved in-vessel risk-relevant issues are studied, through a large number of experiments such as UO2 and MOX dissolution by molten zircaloy and burn-up effects, simultaneous dissolution of UO2 and ZrO2 in rod geometry, oxidation of U-O-Zr mixtures, oxidation of pure B4C material and degradation and oxidation of B4C control rods. SA computer codes are used for plant calculations to assess SA code capabilities and to apply results produced in this project to evaluate their consequences on key SA sequences occurring in different plants such as PWR-1300, BWR, VVER-1000, EPR and in the TMI-2 accident.JRC.F.4-Nuclear design safet