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Erschienen in:
1987 | OriginalPaper | Buchkapitel
Numerical Methods for Advanced LWR Core Simulators
verfasst von : R. Böer, H. Finnemann, E. Michel
Erschienen in: Nuclear Simulation
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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The subject of this paper is the solution of partial differential equations for the simulation of the reactor core on high-performance computers. The multi-level methods used for the calculation of core power distributions are well-suited for the considered multiprocessor systems. The implementation of a multigrid nodal diffusion method on a special array configuration of the memory-coupled multiprocessor DIRMU is outlined. The problem of time integration is discussed from the viewpoint of advanced multi-level techniques and higher-order integration methods. For the reconstruction of local power distributions by means of coarse-mesh solutions the variable-order ECD-method is introduced which yields accurate flux expansion coefficients in the center of a calculational node.