TRANSIENT SIMULATIONS IN VVER-1000 – COMPARISON BETWEEN DYN3D-ATHLET AND DYN3D-RELAP5


TRANSIENT SIMULATIONS IN VVER-1000 – COMPARISON BETWEEN DYN3D-ATHLET AND DYN3D-RELAP5

Kozmenkov, Y.

Simulations of a real transient of an operating VVER-1000 power plant have been performed using DYN3D-ATLET and DYN3D-RELAP5 code systems in the frame of activities aimed at a validation of the coupled neutronic / thermal-hydraulic codes. The problem chosen for simulation is a main coolant pump (MCP) switching off, when three of the four MCPs of the plant are in operation (transient scenario of the VALCO project). The same nodalization models of the plant (except the core) but two different libraries of macroscopic cross-sections have been used in calculations. Additionally, the compared code systems are based on the different - external and internal - coupling techniques. This paper contains a brief description of the coupled codes and the plant model as well as a comparison between results from simulations.

Keywords: coupled code; DYN3D; RELAP5; validation; VALCO project

  • Contribution to proceedings
    Annual Meeting on Nuclear Technology 2004, 25.-27.05.2004, Düsseldorf, Germany, Proceedíngs CD-ROM paper 104

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Publ.-Id: 5919