WCOBRA/TRAC-TF2 Simulation of ROSA-IV/LSTF Natural Circulation Test ST-NC-02

Abstract

The paper presents WCOBRA/TRAC-TF2 simulation results of the high-pressure (~7 MPa) steady-state natural circulation test ST-NC-02 conducted at the ROSA-IV Large Scale Test Facility (LSTF). The simulations used a fairly detailed noding of the LSTF particularly in the vessel and the primary and secondary side of the steam generators. A single flow channel is used to model the primary side of the steam generator U-tubes. In general, the results are in good agreement with those observed in the ST-NC-02 test.