抄録
Critical Heat Flux (CHF) is one of the important parameters for the thermal design of a rod bundle. Subchannel analysis is recommended in the absence of experimental data to determine the thermal margin of a new fuel design using empirical correlations. However, there are a large number of empirical CHF correlations available even for a simple geometry which indicates that a generic correlation with wide range of validity is not available in the literature and hence mechanistic approach could be more appropriate. A mechanistic model based on the Liquid Film Dryout approach with the constitutive models suitable for the BWR conditions have been employed in conjunction with the subchannel code COBRA-IIIC. This paper deals with the film dryout analysis of a typical BWR fuel bundle considering a simplified mechanistic approach in conjunction with the subchannel code.
