VIPRE-W Benchmark With PSBT Void and Temperature Test Data
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
O8-2 OECD Thermalhydraulics Benchmarks

Yixing Sung (Westinghouse Electric Company)
Robert Oelrich (Westinghouse Electric Company)
Charles Lee (Westinghouse Electric Company)
Nicolas Ruiz-Esquide (INVAP, Argentina)
Marcelo Gambetta (INVAP, Argentina)
Claudio Mazufri (INVAP, Argentina)


This paper summarizes comparisons of VIPRE-W thermal-hydraulic subchannel code predictions with measurements of fluid temperature and void from Pressurized Water Reactor subchannel and bundle tests. Using an existing turbulent mixing model, the empirical coefficient derived from code predictions in comparison to the fluid temperature measurement is similar to those from previous mixing tests of similar bundle configurations.  The predicted steady state axial void distributions and time-dependent void profiles based on the Lellouche and Zolotar model generally agree well with the test data.   The void model tends to predict lower void at the upper elevation under bulk boiling. The void predictions are in closer agreement with the measurements from the power increase, temperature increase and flow reduction transients than the depressurization transient.

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