Modeling of critical experiments on the ZR-6 assembly with VVÉR-type uranium-water lattices

An electronic atlas for describing the 2D and 3D mathematical models of critical experiments carried out on the ZR-6 assembly has been developed. A program-generator of the initial data for modeling assemblies using the MCU-RFFI/A program has been produced, by means of which mathematical modeling of 154 configurations can be carried out. The results have been compared with experimental data. For the two-dimensional model the average value of keff over all the configurations amounts to 0.9989±0.0034 (for the KENO-Va program it is 0.9939±0.0048). For the three-dimensional model of 13 configurations an average value of keff of 0.9994±0.0023 has been obtained (for the same assembly in the two-dimensional model the value obtained is 0.99871±0.0030). This enables us to recommend the two-dimensional models investigated for verifying programs of neutron-physical calculations on VVER reactors.