Analysis of modes of heat transfer by fuel damaged by breaking a functioning sidebar of a water-cooled reactor

In the study, a new way to measure the length of film boiling on surfaces of heating particles with reference to the fault condition (interaction of fuel with coolant) in a NPP was considered. Presented is a description of the experimental installation, strategies, and results of length measurements of film boiling of water on spheres of different diameters from honeys and aluminum under different temperatures of interaction. These results can be used to test models and codes for the evaluation of heating efficiency during boiling under corresponding conditions. The primary use of the present work is to verify and calibrate heat transfer correlations us ing the results of experiments. Using correlations to conduct analyses of heat transfer during the boiling on spheres from honeys and aluminum and with provision for results of the experience, boiling curves are produced describing dependency of flow of heat (Q) on fuel temperature (To), size (R), ball material, and temperature of surrounding water (TL). (authors)