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Lee, Deokjung
Computational Reactor physics & Experiment Lab.
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Analysis of Rostov-II Benchmark Using Conventional Two-Step Code Systems

Author(s)
Jang, JaerimHursin, MathieuLee, WoongheePautz, AndreasPapadionysiou, MariannaFerroukhi, HakimLee, Deokjung
Issued Date
2022-05
DOI
10.3390/en15093318
URI
https://scholarworks.unist.ac.kr/handle/201301/58588
Fulltext
https://www.mdpi.com/1996-1073/15/9/3318
Citation
ENERGIES, v.15, no.9, pp.3318
Abstract
This paper presents the steady state analysis of the Rostov-II benchmark using the conventional two-step approach. It involves the STREAM/RAST-K and CASMO-5/PARCS code systems. This paper documents a comprehensive code-to-code comparison between Serpent 2, CASMO-5, and STREAM at the lattice level for the different fuel assemblies (FAs) loaded in the Rostov-II core; and between Serpent 2, PARCS, and RAST-K at the core level in 2D. Finally, the 3D results of both deterministic models are compared to the steady state measurements of the Rostov-II benchmark. With respect to the measurements available in the Rostov-II benchmark, comparable accuracy (30 ppm difference in boron concentration, 2% assembly power) with an industrial calculation scheme (BIPR8) are reported up to 36.73 EFPDs. The calculations reported in the paper showed that the modeling of the resonance self-shielding in the lattice code as well as the geometrical modeling of the reflector are key for an accurate solution (reducing the in-out power tilt). At the core simulator level, a fairly crude 1D reflector model appears to be enough. Overall, this paper provides the detailed models and conditions used in STREAM/RAST-K and CASMO-5/PARCS, and accurate calculation solution for the Rostov-II benchmark with STREAM/RAST-K and CASMO-5/PARCS compared with measurement.
Publisher
MDPI
ISSN
1996-1073
Keyword (Author)
VVER-1000Rostov-IIPWRSTREAMRAST-KCASMO-5PARCS
Keyword
NUCLEAR-DATA LIBRARYFULL-COREVALIDATIONVERIFICATION

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