Nowadays, aerospace companies are looking for the best hardware and software solutions that satisfy on one hand their hunger for performance and efficiency and on the other hand solutions require to be verifiable, economical, safe. In this context, RISC-V ISA has emerged as a good candidate capable of meeting these prerequisites, with the addition of being an open source alternative to commercial ISAs. Another prerogative that a design must possess to be used in the field of aerospace is reliability. A reliable system is widely viewed to be a system that tolerates faults; in the aerospace applications faults may occur as consequence of radiations which manifest themselves as Single Effect Upset (SEU).