Verification of the Dyadyakin and Popov Heat Transfer Correlation using Experiment Data for 3-Rod Bundles

Abstract

The Dyadyakin and Popov (1977) correlation is currently the only heat transfer correlation for fuel bundles cooled using SuperCritical Water (SCW). It was obtained using a 7-element bundle with 4 helical ribs attached from outside. Although Dyadyakin and Popov did not provide the experimental data from which they produced their heat transfer correlation, there is currently experimental data available for a 3-element bundle equipped with helical ribs cooled using SCW. The Dyadyakin and Popov (1977) correlation is to be tested using the new experimental data available for the 3-element bundle to determine if it can accurately model its heat transfer. It is also compared with other verified correlations. In this paper, it is hard to say the Dyadyakin and Popov (1977) correlation is verified, but it shows the similar shapes with Bishop et al. (1964) correlation. Future work should test Dyadyakin and Popov (1977) correlation with 7-element bundle data sets if the data sets are available. Heat transfer correlation is important in fuel bundle designing and simulation.