Abonnement à la biblothèque: Guest

ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

A MECHANISTIC CHF MODEL FOR LIQUID METALS BASED ON FLOW EXCURSION MECHANISM

Get access (open in a dialog) DOI: 10.1615/IHTC10.2500
pages 155-159

Résumé

The prediction of the critical heat flux (CHF) is an important consideration for design and safety analysis of sodium cooled fast breeder reactor (LMFBR). A lot of CHF correlations have been developed for light water reactor core applications. Compared with water, liquid metals show a divergent picture of boiling pattern. Therefore, water CHF correlations cannot be applied to liquid metals, directly. In this paper a mechanistic CHF model for liquid metals is developed based on the flow excursion mechanism. From the Baroczy correlation and the Ledinegg instability criterion, a fundamental approach is tried to derive the relationship between CHF and principal parameters. The overall mean accuracy ratio of the present model for 139 data points is 0.955 with the standard deviation of 0.155. Assessment shows that the predictions agree well with liquid metals CHF data within ± 25 % error bounds.