SMR stands for Small Modular Reactor. It is a proposed class of nuclear fission reactors that are smaller than conventional nuclear reactors. SMRs can be built in one location, such as a factory, then shipped, commissioned, and operated at a separate site. The term SMR refers to the size, capacity, and modular construction only, not to the reactor type and the nuclear process which is applied. SMRs are typically anticipated to have an electrical power output of less than 300 MWe (electric) or less than 1000 MWth (thermal) . SMRs offer many advantages, such as relatively small physical footprints, reduced capital investment, ability to be sited in locations not possible for larger nuclear plants, and provisions for incremental power additions. SMRs also offer distinct safeguards, security, and nonproliferation advantages.