Validation of CATHENA for CHF and Post Dryout Heat Transfer Using an RD-14M Small-Break LOCA Test

Abstract

Code validation was performed to assess the ability of CATHENA MOD-3.5d/Rev 1 to simulate the critical heat flux and post dryout heat transfer phenomena. The simulation results calculated by CATHENA MOD-3.5d/Rev 1 are compared with experimental data from the RD-14M small-break LOCA test B9802. With the new post-dryout heat transfer model implemented in the MOD-3.5d code version, the CATHENA-predicted sheath temperatures are in much better agreement with the test measurements than those from the MOD-3.5c/Rev 0 validation.