“…Owing to a low solidification temperature of the sodium-potassium eutectic (22% Na-78% K; here inafter, wt %), it has previously been used and is still considered as a promising coolant for spacecraft nuclear power plants (SNPPs) [1,2]; because of its proven manufacturability, it can also be used in ther monuclear process plants [3,4]. Vanadium based alloys, in particular, the well known V-4Ti-4Cr alloy (VTKh 8), are attractive for use in both SNPPs and thermonuclear process plants because of their consid erable high temperature strength, a low induced radioactivity (a high resistance to activation), a fairly low specific density, and a potentially high resistance to the effect of liquid metal coolants [3].…”