Thirty-tube once-through steam generator analysis using modified drag and heat transfer correlations Conference Paper uri icon


  • The current version of the RELAP5/MOD2 computer code underpredicts the degree of superheat in the secondary side of the steam generator bundles. Many studies have concluded that this is due to overprediction of the interphase drag force. New interphase drag correlations have been developed for the bubbly and slug regimes. These correlations were implemented in the current version of the RELAP5/MOD2 computer code. Steady state conditions for 65%, 75% and 100% power loads of 30-Tube Once Through Steam Generator (OTSG) test were simulated. The calculated primary and secondary sides temperature profiles show that the new interphase drag correlations achieved closer agreement with experimental data than the temperature profiles of the original code.

author list (cited authors)

  • Hassan, Y. A., & Rais, O.

publication date

  • December 1990