Current and Planned Activities of the FONESYS Network of System Code Developers in Collaboration with the SILENCE Network of Experimentalists
Résumé
FONESYS is an international network of system code developers created in 2010 to share information on R&D, to benchmark codes, to discuss the Validation and Verification as well as the code scalability and uncertainty quantification. APROS, ARIANT, ATHLET, CATHARE, CATHENA, COSINE, , LOCUST, MARS-KS, RELAP5, RELAP5-3D, SPACE, TRACE are the codes that were involved in the FONESYS activities: updating the state of the art, identifying issues, discussing envisaged solutions, sharing experience in 3-field models, transport of interfacial area, numerical issues and well-posedness, code uncertainty evaluation. Code benchmarking were performed on boiling channel with CHF and Post-dryout, two-phase critical flow, flow regime transitions in horizontal flow, core interfacial friction, core 3D-mixing effects and two-phase singular pressure losses. Many code improvements were implemented in the various codes following the benchmark activities. When the need of new experimental data was identified, FONESYS discussed with SILENCE experimentalists to define requirements of new instrumentation and new experiments. Future activities will focus on code scalability, core 3D modelling and validation, two-phase pressure losses, use of system codes for scaling analysis and applications to passive systems, SMRs and AMR. The present paper presents the major achievements and the motivations for the future activities.