Task 8 Final Report Pre-test Analyses of Gidropress Mixing Facility Experiments

The EC- (European Commission) EURATOM TACIS project 2.02/02 aims at safety evaluation of VVER-1000 Russian Design, Gidropress, pressurized water reactor. University of Pisa was partner for the project leaded by AREVA in Germany. Mixing of boron in the vessel constitutes a safety issue to be addressed. To this aim qualified computational tools shall be available. In order to demonstrate the quality level of codes, experimental data are needed. This document deals with the design of boron mixing relevant experiments part of the research campaign in the newly constructed GIDROPRESS test facility in Podolsk (Moscow region). The design of the experiments was finalized by the application of the Relap5/3D, system thermal-hydraulics code and CFX, CFD code available at University of Pisa.