What is "rapid-l"

The RAPID-L, RAPID-L (L: Lunar base, A: Automatic，T: Thermoelectric) is a micro nuclear reactor concept conceived as a powerhouse for colonies on the Moon and Mars. It is based on the RAPID-series (Refueling by All Pins Integrated Design) fast breeder reactor using a liquid lithium-6 design. The study was funded by the Japan Atomic Energy Research Institute (JAERI) in FY 1999-2001. The research was carried out by Japan's Central Research Institute of Electric Power Industry (CRIEPI), Komae Research Laboratory.