Validation and comparison of two-phase flow modeling capabilities of CFD, sub channel and system codes by means of post-test calculations of BFBT transient tests

Validation of the thermal-hydraulic system code ATHLET based on selected pressure drop and void fraction BFBT tests

“…Such results have been obtained in a previous work carried out at INR (Jaeger et al, 2013), which the reader can refer to for a detailed description of the models.…”

“…12 and 13. The experimental data measured by the used pressure sensors show a rather large spread, due to the fact that these values derives from absolute pressure measures at a normal pressure level of 7 MPa (differential pressure gauges results were not available) (Jaeger et al, 2013). Since the related experimental uncertainty is about 1% (±0.7 bar), the spread of data shown in the pictures is obtained when the pressure difference is in the range of only 1 bar.…”

“…Part of this database is available for international benchmark activities, http (Neykov et al, 2005). The BFBT results were adopted in a previous work (Jaeger et al, 2013) for the validation of four different codes -NEP-TUNE CFD 1.0.8 (Lavieville et al, 2006), SUBCHANFLOW 2.1 (Imke et al, 2010), COBRA-TF (Thurgood et al, 1981), and TRACE 5P2 (US NRC, 2010) -which are used and validated to cover the full range of thermal-hydraulic design and transient analysis.…”