Verification of the trigonal-geometry diffusion and SP3 models of the code DYN3D
Verification of the trigonal-geometry diffusion and SP3 models of the code DYN3D
Duerigen, S.; Nikitin, E.; Mittag, S.
DYN3D is a three-dimensional nodal diffusion code for steady-state and transient analyses of Light-Water Reactors with square and hexagonal fuel assembly geometries, applicable also to innovative reactor concepts. Currently, several versions of the DYN3D code are available including a multi-group diffusion and simplified P3 (SP3) neutron transport option.
In this work, both the diffusion and SP3 method in trigonal geometry are verified by means of fine-mesh homogenized reference solutions. Good agreement is observed for eigenvalues, neutron flux and power distributions. Mesh refinement studies show that the trigonal nodal DYN3D methods converge well to the fine-mesh references. Furthermore, an anisotropic-scattering benchmark problem was chosen to show the advantage of the SP3 method over the diffusion approach.
Keywords: simplified P3; SP3; nodal method; trigonal; triangular; hexagonal; DYN3D; mesh refinement
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Contribution to proceedings
22nd SYMPOSIUM of ATOMIC ENERGY RESEARCH (AER) on VVER Reactor Physics and Reactor Safety, 01.-05.10.2012, Pruhonice, Czech Republic -
Lecture (Conference)
22nd SYMPOSIUM of ATOMIC ENERGY RESEARCH (AER) on VVER Reactor Physics and Reactor Safety, 01.-05.10.2012, Pruhonice, Czech Republic
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