The main objective of GEMMA is to address those remaining key areas concerning materials behaviour under GenIV reactor
conditions where R&D is required to approach technological maturity.
Consistently, four strategic objectives are pursued:
- Advance in the qualification of currently available materials under conditions of relevance for GenIV reactors, by focusing on those currently chosen as candidate for structural core components, including welds, and by selecting conditions of specific interest for the different ESNII prototypes, in order to derive or improve correlations of use for their design
- Advance the predictive capabilities of models describing the modifications experienced by materials in operation when subjected to irradiation or exposed to corrosive environments, by adopting a physicsbased approach validated on bespoke experiments on both technological and model materials
- Explore and identify mitigation strategies to reduce the degradation of materials in operation and therefore enhance the safety and efficiency of the systems, based both on the improved understanding of the physical mechanisms and processes leading to the changes of the properties of materials and on the adoption of measures of protection (specifically surface engineering solutions against aggressive environments), considering also the development of innovative materials
- Ensure a continuous dialogue and exchange with the system designers, in order to guarantee the relevance of the results obtained and the transfer of results and approaches to the end-users, paving the way whenever possible for the updating of design codes such as RCC-MRx, while setting in place a strategy for the widest dissemination possible of the results, including open access and measures aimed at attracting young researchers to the field of nuclear materials