This is an annotated list of all the nuclear fission-based nuclear research reactors in the world, sorted by country, with operational status.
Some "research" reactors were built for the purpose of producing material for nuclear weapons.
(kW) Notes: The main uses of the current OPAL reactor are: CNEN - Comissão Nacional de Energia Nuclear Working: Note: Tamuz-1 and Tamuz-2 are parts of the same French nuclear research complex design, the OSIRIS research complex.
Research and test reactors Under decommission order(s) or license amendment(s) are authorized to decontaminate and dismantle their facility to prepare for final survey and license termination.
Research and test reactors with possession-only licenses are not authorized to operate the reactor, only to possess the nuclear material on-hand.