Implementation of Thermo-Physical Properties and Thermal-Hydraulic Characteristics of Lead-Bismuth Eutectic and Lead on CATHARE Code

The nuclear innovative systems cooled by Lead-Bismuth Eutectic (LBE) and pure Lead are object of an ongoing interest in Europe, but also outside, evidenced by a large number of national and international projects. Within the European Framework Programmes, hence, it has been highlighted the needs of a thermal-hydraulic system code able to treat these Heavy Liquid Metals (HLM) systems, with a particular interest for a 'European' code. Taking into account this scenario a Specific Topic of Cooperation (STC) has been agreed in the frame of ENEA/CEA collaboration on Nuclear Fission with the objective of extend the capability of the French system code CATHARE to simulate HLM reactors. The CATHARE code has been already modified in the recent past to be multi-fluid with well proven capabilities and moreover, it is already part of an European simulation platform (NURISP project) devoted to LWR system studies and aiming to be extended also to advanced reactors. For what regards the computational phase, the implementation takes advantage of the work already done by the Cathare-Team with the properties of sodium and for what regards the material properties, thanks to the European working group WG-LBE that in the past years have collected the state-of-the-art for LBE and Lead characteristics. This technical report summarize the work done to implement the LBE and Lead properties in CATHARE code, in collaboration/supervision with the Cathare-Team, pointing out the constraints and needs of the computational phase, the physical properties adopted, the subroutine changed and finally, some preliminary results on analytical tests.