DYN3D/M2 - a Code for Calculation of Reactivity Transients in Cores with Hexagonal Geometry


DYN3D/M2 - a Code for Calculation of Reactivity Transients in Cores with Hexagonal Geometry

Grundmann, U.; Rohde, U.

The code DYN3D/M2 consists of a the 3-dimensional neutron kinetic model of the code HEXDYN3D and the thermohydraulic model of the code FLOCAL. The neutron kinetics of DYN3D/M2 is calculated by using a nodal expansion method (NEM) for hexagonal geometry. The developed method solves the neutron diffusion equation for two energy groups. Stationary state and transient behaviour can be calculated. By help of the code PREPAR-EC parameterizid neutron physical constants of given burnup distribution can be transferred from the MAGRU library to an input file of DYN3D/M2. The code FLOCAL consisting of a two-phase coolant flow model, a fuel rod model and a heat transfer regime map up to superheated steam is coupled with neutron kinetics by the neutron physical constants. One coolant channel per fuel assembly and additional hot channels are considered. The activities for code validation and the range of application are described.

  • Open Access Logo Forschungszentrum Rossendorf; FZR 93-01 Reprint of Report ZfK-690, November 1989
    ISSN: 1436-3976

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Publ.-Id: 10