EXPERIMENTAL AND COMPUTATIONAL INVESTIGATIONS OF HEAT MASS TRANSFER INTENSIFIER GRIDS OF VARIOUS DESIGNS FOR EFFECTIVENESS

Kobzar L.L., Oleksyuk D.A., Semchenkov Y.M., NRC Ā«Kurchatov instituteĀ», Russia

24th Symposium of AER on VVER Reactor Physics and Reactor Safety (2014, Sochi, Russia)
Core surveillance and monitoring

Abstract

EXPERIMENTAL AND COMPUTATIONAL INVESTIGATIONS OF HEAT MASS TRANSFER INTENSIFIER GRIDS OF VARIOUS DESIGNS FOR EFFECTIVENESS
Kobzar L.L., Oleksyuk D.A., Semchenkov Y.M. NRC “Kurchatov Institute”, Moscow, Russia
ABSTRACT
The report describes the experimental work and calculations performed at the National Research Center “Kurchatov Institute” in recent years on the subject of heat mass transfer intensification.
Due to the increased power of operated blocks of NPP research of the intensification of heat-mass transfer held in various scientific and engineering organizations in Russia. In recent time many variations of intensifiers grids have offered. These grids have a positive influence, both the alignment parameters of the coolant for the assembly cross-section and to DNBR increase.
In NRC “Kurchatov Institute”, a large volume of experimental research on the determining the effectiveness different types of grids – intensifiers. Among the researching models was grid, which developed at NRC “Kurchatov Institute”. Results of experimental research can be used for verification of calculation models and codes.
The experimental data were obtained for the calculation of correlation coolant mixing and critical heat flux in rod bundles with intensifiers grids. Developed correlations have been introduced in subchannel code SC-INT. The comparison of the results of calculations by the code SC-INT with the experimental data is presented on the paper.

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