Validation of the novel core solver nTRACER/COBRA-TF for full core high fidelity cycle analysis of VVERs

This work is focused on the expansion of Laboratory Reactor Physics and Thermal-Hydraulics (LRT) PSI multi-physics high-resolution core solver nTF/CTF to full cycle analysis for VVERs. The development code modifications depletion calculation scheme presented in detail. 1st X2 benchmark simulated by novel solver. All necessary approximations modeling options optimize computational cost are discussed this work. validated coarse mesh with experimental data its capabilities pin sub-pin predictions showcased. discrepancies remain within target accuracy, as it set utilities. requirements not forbidding use an auxiliary audit tool production calculations.