The JASMIN-project centers on developing a robust and modern simulation tool relating to the safety of Sodium-cooled Fast Neutron Reactors (SFR), particularly with regard to Severe Accidents. It supports the ESNII (European Sustainable Nuclear Industrial Initiative) roadmap and the Strategic Research Agenda and the Deployment Strategy of SNETP (Sustainable Nuclear Energy Technology Platform).
The available codes today have been developed in the 80’s for previous-generation SFR designs. The main advantage of the future ASTEC-Na code will be to gather in an integrated tool what all the previous codes simulate separately (initiation phase, containment behaviour and source term evaluations…) which is needed for the indispensable safety assessments of the fast neutrons systems. The objective is to develop a new European simulation code, ASTEC-Na, with improved physical models, accounting for results of recent LWR research, with modern software architecture and high flexibility to account for innovative reactor designs. It will be based on the ASTEC European code system, developed by IRSN and GRS for severe accidents in water-cooled reactors (Figure 2). This will allow capitalizing the state-of-the-art knowledge on SFR severe accidents.
The project has started in December 2011, with a duration of four years. The participating organizations are