ABSTRACT
The Power Reactor Inherently Safe Module (PRISM), designed by GE Hitachi Nuclear Energy (GEH), is a small, modular, sodium-cooled fast reactor (Figure 6.1). The PRISM core is located in a pool-type containment vessel and is fueled with metallic fuel. Each PRISM module produces 311 MWe of electricity. PRISM is inherently safe due to its negative power reactivity feedback, large in-vessel coolant inventory, passive heat removal systems, below ground siting, and atmospheric reactor vessel operating pressure. PRISM is able to fission a variety of nuclear fuel sources including electrometallurgically recycled used nuclear fuel (UNF) from light water reactors (LWRs) as well as legacy separated materials such as plutonium. The PRISM design is often coupled with an electrometallurgical used fuel recycling process.
