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- W2901078412 abstract "Abstract A key challenge for full-core transport methods is reactor agnostic multi-group cross section (MGXS) generation. Monte Carlo (MC) presents the most accurate method for MGXS generation since it does not require any approximations to the neutron flux. This paper introduces a framework that replaces the traditional multi-level approach to MGXS generation with a single MC calculation to generate the fine-spatial mesh MGXS that are needed by high-fidelity transport codes. In addition, three pin-wise spatial homogenization schemes are introduced to model inter-pin spatial self-shielding spectral effects with varying levels of spatial fidelity. Most notably, the Local Neighbor Symmetry (LNS) scheme uses a nearest neighbor-like analysis of a reactor geometry to determine which fuel pins should be assigned the same MGXS. The single-step MGXS framework with the three spatial homogenization schemes are evaluated for two PWR benchmarks. The results demonstrate the potential for single-step MC simulations of the complete heterogeneous geometry as a means to generate reactor agnostic MGXS for deterministic transport codes." @default.
- W2901078412 created "2018-11-29" @default.
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- W2901078412 date "2019-03-01" @default.
- W2901078412 modified "2023-10-13" @default.
- W2901078412 title "A single-step framework to generate spatially self-shielded multi-group cross sections from Monte Carlo transport simulations" @default.
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- W2901078412 doi "https://doi.org/10.1016/j.anucene.2018.11.017" @default.
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