Analysis of Rostov-II Benchmark Using Conventional Two-Step Code Systems

This paper presents the steady state analysis of Rostov-II benchmark using conventional two-step approach. It involves STREAM/RAST-K and CASMO-5/PARCS code systems. documents a comprehensive code-to-code comparison between Serpent 2, CASMO-5, STREAM at lattice level for different fuel assemblies (FAs) loaded in core; PARCS, RAST-K core 2D. Finally, 3D results both deterministic models are compared to measurements benchmark. With respect available benchmark, comparable accuracy (30 ppm difference boron concentration, 2% assembly power) with an industrial calculation scheme (BIPR8) reported up 36.73 EFPDs. The calculations showed that modeling resonance self-shielding as well geometrical reflector key accurate solution (reducing in-out power tilt). At simulator level, fairly crude 1D model appears be enough. Overall, this provides detailed conditions used CASMO-5/PARCS, measurement.