Abstract
In this paper, the strong influence of the clad failure criteria on the calculated scenario of bundle degradation was demonstrated on the basis of comparative analysis of Phebus FP and PBF–SFD tests using the SVECHA/QUENCH (S/Q) code. The main peculiarity of the proposed mechanistic criteria is that they are based on the actual geometry of degraded fuel rods and not on a constant, user-defined failure temperature. This allows better modelling concerning the formation of local molten pool(s) in the upper part of bundle and the timing of subsequent materials relocations from the local molten pool(s). In general, the mechanistic criteria developed allow one to reasonably calculate the bundle degradation progression in both tests. Therefore, it is recommended to use these new, mechanistic cladding failure criteria in the severe accident system codes as well.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
