Title: Application of Mechanistic Criteria of Cladding Oxide Shell Failure to the Analysis of Core Degradation Simulated in Bundle Meltdown Tests
Authors: VESHCHUNOV M.s.BOLDYREV A.v.TOTH BELA
Citation: NUCLEAR ENGINEERING AND DESIGN vol. 238 no. 9 p. 2219-2229
Publisher: ELSEVIER SCIENCE SA
Publication Year: 2008
JRC N°: JRC37446
ISSN: 0029-5493
URI: http://www.elsevier.com/locate/nucengdes
http://publications.jrc.ec.europa.eu/repository/handle/JRC37446
DOI: 10.1016/j.nucengdes.2008.03.008
Type: Articles in Journals
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 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.
JRC Institute:Institute for Energy and Transport

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.