Conference Proceedings Paper
VIPRE-W / MEFISTO-T, a Mechanistic Tool for Transient Prediction of Dryout in BWR Fuel Assemblies
NURETH-14 - 2011 September 25-30
Carl Adamsson (Westinghouse Electric Sweden AB)
Jean-Marie Le Corre (Westinghouse Electric Sweden AB)
The VIPRE-W/MEFISTO-T code package constitutes a simplified approach to sub-channel filmflow analysis whereby the transport equations for the liquid films are decoupled from each other. The approach allows fast and robust simulation with high axial resolution of realistic BWR transients. It has previously been shown that a steady-state version of the model agrees well with dryout measurements in full-scale fuel assembly mock-ups performed at the Westinghouse FRIGG loop. In this paper, we present validation of the transient version of the code with around 300 transient dryout experiments from the same loop. The transients involve realistic variations of flow and power and three different axial power distributions at conditions typical for BWR operation. The results from the film-flow analysis show high precision in the dryout prediction but a hitherto unexplained bias that reduces the accuracy.
Individual Conference-Paper Copies (Electronic Where Available):
- For CNS members, the first 5 copies per calendar year are free, and additional copies are $10 each.
- For non-members, the price is $25 for the first Conference-paper copy in a request, and $10 each for additional copies of papers in the same conference and in the same request.
- Contact the CNS office to order reprints.