RAPID-L operator-free fast reactor for lunar base and RAPID operator-free fast reactor for terrestrial power systems

Outline of RAPID-L (Refueling by All Pins Integrated Design-Lunar base: 200 kw power) operator-free fast reactor for lunar base and RAPID (1000kW power) operator-free fast reactor for terrestrial power systems and the development conditions of related component technologies such as operator-free device LEM (Lithium Expansion Module), LIM (Lithium Injection Module)and LRM (lithium Release Module) are reported. LEM is liquid control rod operated by the principle of mercury thermometer. LIM is a shutdown reactor system independent on gravity. When primary coolant attained to the suitable temperature for operating the reactor, freeze seal within LRM melts and 6Li moves at a slow speed, which the same action as control rod withdrawal. When the core exit temperature is over the regular temperature, LEM senses it and inserts the negative reactivity. Close teamwork of LRM and LEM can start as same as a veteran operator. RAPID and RAPID-L have not control rod and are able to move by operator-free using LEM, LIM and LRM. (S.Y.)