Modeling of benchmark experiments performed at ZR-6 critical facility and validation of the MCU-REA code - 208

The report presents the results of two- and three-dimensional calculations of 154 experiments performed at ZR-6 critical facility designed to study UO₂-water lattices of VVER type reactors. The calculations have been performed to verify and validate (V and V) the new MCU-REA Monte- Carlo code (Russia) and verify the reliability of both two- and three-dimensional evaluated models of experimental configurations. The results obtained are in good agreement with the experimental data. An important conclusion that follows from the analysis of calculational results is that the two-dimensional model criticized at times due to the nonconformity with the real facility may be reliably used to validate design codes intended for VVER calculations. (author)