WCOBRA/TRAC-TF2 Simulation of ROSA-IV/LSTF Natural Circulation Test ST-NC-02
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
O11-1 Westinghouse Full Spectrum LOCA – A Realistic LOCA Evaluation Model Applicable to the Full Ran

Nikolay Petkov (Westinghouse Electric Company)
Katsuhiro Ohkawa (Westinghouse Electric Company)
Cesare Frepoli (Westinghouse Electric Company)


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.

Individual Conference-Paper Copies (Electronic Where Available):

  • For CNS members, the first 5 copies per calendar year are free, and additional copies are $10 each.
  • For non-members, the price is $25 for the first Conference-paper copy in a request, and $10 each for additional copies of papers in the same conference and in the same request.
  • Contact the CNS office to order reprints.