Multi-purpose hYbrid Research Reactor for High-tech Applications (Belgium = lead)
What is Myrrha?
MYRRHA is the very first prototype in the world of a nuclear reactor driven by a particle accelerator. Distinctive feature: as an external source of neutrons, this particle accelerator maintains the nuclear fission chain reaction.
It is referred to as a subcritical reactor: the core does not contain enough fissile material to spontaneously maintain the chain reaction.