New developments in Cathare 2 code

Several thermalhydraulics codes of second generation have been developed during the last ten years. Two fluid six equation models are involved in these codes in which one or three dimensional modules are used. These codes are operational and have proved their efficiency in a wide range of applications in research and development studies as well as in safety studies. CATHARE is the best estimate code, developed by EDF, FRAMATOME and CEA. It is used for Research and Development, licensing and safety studies by the French partners. It is also widely used by industrial and safety institutes in several countries. Thus a new version of CATHARE 2 has been developed. Its main objectives can be divided into 4 topics, as follow: - This new version is fast running, in order to be integrated in the new generation of simulators. - The flexibility has been improved, in particular its robustness because the code is used for industrial studies and safety studies. - The code can be easily couplable with other codes. - A 3 dimensional module has been developed. (authors). 6 tabs., 13 refs., 5 appendix