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Multiphase Science and Technology
SJR: 0.124 SNIP: 0.222 CiteScore™: 0.26

ISSN Imprimir: 0276-1459
ISSN On-line: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v26.i4.30
pages 305-327

BEST-ESTIMATE SIMULATIONS OF CONDENSATION-INDUCED WATER HAMMER IN HORIZONTAL PIPES WITH THE SYSTEM ANALYSIS CODE ATHLET

Sabin Cristian Ceuca
Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH
H. Austregesilo
Gesellschaft fur Anlagen- und Reaktorsicherheit (GRS) mbH, Forschungsinstitute, 85748 Garching, Germany
R. Macian-Juan
Paul Scherrer Institut, 5232 Villigen PSI, Switzerland; and Department of Nuclear Engineering, TU Munchen, Boltzmannstrasse 15, D-85748 Garching, Germany

RESUMO

A newly developed hybrid heat transfer coefficient module has been developed, based on two individual surface renewal theory models and implemented into the German thermal-hydraulic system analysis code ATHLET (which stands for analysis of thermal hydraulics of leaks and transients). The new model is based on mechanistic assumptions and does not require special parameter tuning, thus increasing the predictive capabilities of the system analysis code. This model was validated against a full set of 33 experiments performed at the PMK-2 facility for the analysis of condensation-induced water hammer phenomena in a horizontal test section. The integral thermalhydraulic experimental facility has a similar design to the main steam line of a WWER nuclear power plant.