Assessment of RELAP5/MOD3.2 with Condensation Experiment in the Presence of Noncondensables in a Vertical Tube

  • Park, Hyun-Sik (Dept. of Nuclear Eng., Korea Advanced Institute of Science and Technology) ;
  • No, Hee-Cheon (Dept. of Nuclear Eng., Korea Advanced Institute of Science and Technology)
  • Published : 1998.05.01

Abstract

The standard RELAP5/MOD3.2 code were assessed with the condensation experiment in the presence of noncondensable gas in a vortical tube of PCCS of CP-1300. There are two wall film condensation models, the default model and the alternative model, in RELAP5/MOD3.2. The experimental apparatus was modeled with the two models, md simulations were performed for several sub-tests to be compared with the experimental results. In overall sense the simulation results showed that the default model of RELAP5/MOD3.2 under-predicts the heat transfer coefficients, while the alternative model over-predicts them throughout the condensing tube.

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