CATHARE-3: A new system code for thermal-hydraulics in the context of the NEPTUNE project

Implementation and Comparison of High-Resolution Spatial Discretization Schemes for Solving Two-Fluid Seven-Equation Two-Pressure Model

“…Using the volume fraction propagation as a basic conservation equation is widely used because it changes the structure of conservation equation system and makes seven-equation model unconditionally hyperbolic (well-posed) in the sense of Hadamard [15]. In recent years, the development of advanced thermalhydraulics system analysis codes has aroused great interest such as RELAP-7 [16], NEPTUNE project [17], CASL [18], and CATHARE-3 [19]. RELAP7 code developed by the Idaho National Laboratory is ongoing now.…”

Assessment of wall friction model in multi-dimensional component of MARS with air–water cross flow experiment

“…Nowadays, the system codes adopted multi-dimensional modules to simulate multi-dimensional two-phase phenomena more realistically, for example, RELAP5-3D (Idaho National Laboratory, 2005), MARSMultiD (Korea Atomic Energy Research Institute, 2007), SPACE (Korea Hydro and Nuclear Power, 2012) TRACE (U. S. Nuclear Regulatory Commission, 2007) and CATHARE3 (Emonot et al, 2011). However, the model and correlations which are incorporated in the multi-dimensional modules are ones from onedimensional module that were developed by one-dimensional experimental results.…”

On the Modelling of Two-Phase Flow in Horizontal Legs of a PWR

“…This is the reason why all system thermalhydraulic codes (see [1,2,3,4,5]) model two-phase flow in pipes with a 1D approach. Multi-dimensional models are only required when a 3D velocity field is encountered, like the downcomer refill in a LBLOCA or the transverse mixing phenomena encountered in a reactor core when there is a transverse power profile.…”

“…The classical two-fluid six-equation one-pressure model is then presented and its properties are described. This paper mainly refers to the CATHARE system code [1,2,3] developed jointly by EDF, CEA, AREVA and IRSN, and some comparisons with other system codes [4,5] are also made. Since phase stratification plays a dominant role, the Kelvin-Helmholtz instability and the stability of bubbly flow regime are discussed.…”