A variety of concepts for combining an NPL and fission reactor into a compact efficient NPL system have been considered [6, 10, 70—74]. For example, as previ­ously mentioned, work at the University of Missouri involved an aerosol reactor concept called Aerosol Reactor Energy Conversion System (ARECS) proposed as a nuclear-driven flash lamp [75—77]. The ARECS concept is potentially attractive for several applications, including photolytic lasers, photochemical production, and photoelectric or photo-electrochemical generation of electricity. These processes can be achieved at both high efficiency and high temperature. Consequently, this approach could serve as a topping cycle for an integrated reactor energy conversion system.