A sensitivity study of the heat transfer processes involved in a hot-leg rupture in a pressurised water-cooled system
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Date
1977-09
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Atomic Energy Commission
Abstract
Series of computer experiments was performed, using the reactor thermal analysis code THETAl-B, to ascertain the significance and relative importance of the various heat transfer processes in relation to the prediction of maximum surface temperatures for:
(i) the fuel cladding during the blowdown phase of a loss of coolant accident (LOCA) for a hot-leg rupture in a pressurised water reactor system; and (ii) an electrically heated tube of a simple water-cooled test
assembly, subjected to a corresponding hot-leg blowdown, for which experimental results have been published. The significance of several factors was considered, including the choice of heat transfer correlation for a particular heat transfer regime, and inlet coolant flow conditions. For both cases the predicted maximum surface temperature was sensitive to a number of factors, including choice of heat transfer correlations for (i) critical heat flux, (ii) flow boiling transition region and, in particular, (iii) stable film boiling.
Description
Keywords
Computer calculations, Loss of coolant, Ruptures, PWR type reactors, Fuel elements
Citation
Green, W. J. (1977). A sensitivity study of the heat transfer processes involved in a hot-leg rupture in a pressurised water-cooled system (AAEC/E416). Lucas Heights, NSW, Australian Atomic Energy Commission Research Establishment Lucas Heights.