Materials for ESNII demonstrators and prototypes

Coordinated by Karl-Fredrik Nilsson, EC-JRC (EU)

The early ESNII (European Sustainable Nuclear Industrial Initiative) systems will rely on commercially available materials such as ferritic/martensitic steels, austenitic steels and Ni alloys that need to be qualified for the extreme conditions and a 60 years design life. A pre normative R&D programme for structural and clad materials has been initiated including: updating of Design Codes for high temperature applications; test and screening procedures for material properties in heavy-liquid alloys; assessment of protective coatings; and test programme to improve the understanding the environmental degradation mechanisms such as liquid metal embrittlement.