FEATURES OF CONVECTIVE TURBULENT FLOWS BEHIND THE MIXING SPACER GRIDS OF THE TVS-KVADRAT OF THE PWR-TYPE REACTOR

This paper presents the results of experimental investigations of the infl uence of mixing spacer grids with different types of defl ectors on the coolant fl ow in the TVS-Kvadrat fuel assembly of the PWR-type reactor. Investigations were conducted on an aerodynamic stand with the use of a multichannel pneumometric probe. Analysis of the spatial distribution of projections of the absolute fl ow velocity permitted detailing the coolant fl ow pattern behind the mixing spacer grid with various types of defl ectors of mixing grids. The results obtained in the present paper are used to verify three-dimensional CFD programs, and in applied cell by cell codes they also serve as a database in calculations of thermotechnical reliability of the cores of PWR-type reactors with the TVS-Kvadrat.
   
Author:  S. M. Dmitriev, A. V. Varentsov, D. V. Doronkov, M. A. Legchanov, V. D. Sorokin, and A. E. Khrobostov
Keywords:  reactor core, fuel assembly, mixing spacer grid, coolant hydrodynamics
Page:  1131