Development of a Coupled 1D-3D Thermalhydraulic Code for Nuclear Power Plant Simulation and Its Application to a Pressurized Thermal Shock Scenario in PWR
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
B4-1 Plant System Safety Code Development and Assessment

Angel Papukchiev (Gesellschaft fuer Anlagen- und Reaktorsicherheit mbH)
Georg Lerchl (Gesellschaft fuer Anlagen- und Reaktorsicherheit mbH)
Johannes Weis (Gesellschaft fuer Anlagen- und Reaktorsicherheit mbH)
Martina Scheuerer (Gesellschaft fuer Anlagen- und Reaktorsicherheit mbH)
Henrique Austregesilo (GRS)


Thermal-hydraulic (TH) system codes are developed for the evaluation and improvement of the design and safety of nuclear facilities. Since the numerical modeling of the thermal-hydraulic processes is 1D in nature, these programs have only limited capabilities to predict in detail 3D flows and coolant mixing processes. In contrast, computational fluid dynamics (CFD) software tools are used for 3D flow calculations with high spatial resolution. In order to realistically and efficiently simulate the thermal-hydraulic phenomena in a nuclear power plant (NPP), GRS has developed a methodology for the coupling of the TH system code ATHLET with the 3D CFD software ANSYS CFX. Within the European project NURISP validation activities for the 1D-3D code ATHLET - ANSYS CFX based on a Pressurized Thermal Shock (PTS) related experiment are performed.

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