Computer models on fission product and aerosol behaviour in the LWR primary coolant system - Part II : Fission product and aerosol transport
This report contains the final results of a research activity carried out with a view to improving the computer models for the description of aerosol transport throughout an LWR primary circuit under severe accident conditions. Four main topics of the aerosol physical behaviour have been explored: the deposition due to pipe irregularities; the deposition under turbulent flow conditions; the transport under two-phase flow regime, and the dry physical resuspension. The study has led to a critical review of the most accredited models, giving an evaluation of their capabilities and choosing the most appropriate ones for primary circuit analyses. An original semi-empirical model, based on the experimental data existing in the source term field, has been set up for the physical resuspension. Strategies to improve significantly the computational methodology related to aerosol transport have been specified. The prevention of numerical instabilities, the speed of calculation and the performance of the proposed aerosol models have been verified through an ad hoc computer tool.
Bibliographic Reference: EUR 14676 EN (1993) 176 pp., FS, ECU 16.50
ISBN: ISBN 92-826-5124-X
Record Number: 199310693 / Last updated on: 1994-11-29
Original language: en
Available languages: en