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- W1978354702 abstract "In this study, a new analytic function expansion nodal (AFEN) method was developed to solve multi-group and three dimensional neutron simplified P3 equations (SP3) in reactor cores with rectangular fuel assemblies. In this method, the intranodal fluxes are expanded into a set of analytic basis functions for each group and moment. The nodes are coupled through the surface averaged partial currents at each nodal interface. Thus, six boundary conditions at each group and Legendre moments have been considered. Coarse group rebalancing (CGR) method was applied to increase the speed of code calculations. The code takes few-groups cross sections produced by a lattice code such as WIMS and calculates the effective multiplication factor, zeroth and second moments of the flux in multi-group energy, reactivity, and the relative power density at each fuel assembly. The numerical results for different benchmark problems demonstrate that solution of SP3 equations by our AFEN method improves both effective multiplication factor (keff) and power distribution compared to our AFEN diffusion method, especially in heterogeneous geometry and mixed-oxide (MOX) fuel problems." @default.
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- W1978354702 date "2015-03-01" @default.
- W1978354702 modified "2023-10-18" @default.
- W1978354702 title "New analytic function expansion nodal (AFEN) method for solving multigroup neutron simplified P 3 (SP 3 ) equations" @default.
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- W1978354702 doi "https://doi.org/10.1016/j.anucene.2014.11.012" @default.
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