Generation IV and Advanced Concepts

Generation IV (Gen IV) reactors are nuclear reactor design technologies that are envisioned as successors of generation III reactors.

Passive nuclear safety is a design approach for safety features, implemented in a nuclear reactor, that does not require any active intervention on the part of the operator or electrical/electronic feedback in order to bring the reactor to a safe shutdown state, in the event of a particular type of emergency (usually overheating resulting from a loss of coolant or loss of coolant flow).

A molten-salt reactor (MSR) is a class of nuclear fission reactor in which the primary nuclear reactor coolant and/or the fuel is a mixture of molten salt with a fissile material.

Photon-intermediate direct energy conversion (PIDEC) is a scheme for direct conversion of nuclear power to electricity.

The liquid fluoride thorium reactor (LFTR; often pronounced lifter) is a type of molten salt reactor.

The supercritical water reactor (SCWR) is a concept Generation IV reactor, designed as a light water reactor (LWR) that operates at supercritical pressure (i.e. greater than 22.1 megapascals [3,210 psi]).

A traveling-wave reactor (TWR) is a proposed type of nuclear fission reactor that can convert fertile material into usable fuel through nuclear transmutation, in tandem with the burnup of fissile material.

An accelerator-driven subcritical reactor (ADSR) is a nuclear reactor design formed by coupling a substantially subcritical nuclear reactor core with a high-energy proton or electron accelerator.

The Dual Fluid Reactor is a reactor concept of the Canadian company Dual Fluid Energy Inc.