Graphite-salt-alloy systems

Certainly, some less mature approaches are possible and could be of interest for new MSR concepts. For example, Ni-W-Cr alloys (see EM-721 in Table 5.3) have been recentiy proposed by French CNRS for their high potential to corrosion resistance for very high-temperature operation (>750°C) [5]. Temperature >850°C would require the use of new solutions such as refractory alloys or graphite. Included in further evaluation should be also the assessment of (1) effects dealt with in the use of new solvent systems proposed (e.g., Li,Th/F), (2) increased fuel salt outlet temperatures >750°C, and (3) lower salt redox potentials from the stand point of establishing the potentials that must be maintained to avoid IGC for Ni-based alloys. 

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