A fast-neutron reactor (FNR) or fast-spectrum reactor or simply a fast reactor is a category of nuclear reactor in which the fission chain reaction is sustained by fast neutrons (carrying …

Aug 20, 2025 · Fast reactors use fast-moving neutrons to make better use of nuclear fuel. They can operate on recycled fuel from other reactors to drastically improve the fuel efficiency, …

Fast-neutron reactors (FNR) are nuclear reactors characterized by a core zone that contains mainly neutrons with kinetic energies around 5 MeV, eliminating the need for a neutron …

Aug 26, 2021 · Fast neutron reactors offer the prospect of vastly more efficient use of uranium resources and the ability to burn actinides which are otherwise the long-lived component of …

Dec 30, 2025 · To achieve higher energy levels and promote fission over neutron capture, a reactor can be built to operate without a moderator.

By operating in the fast spectrum with a liquid metal coolant, fast reactors are able to provide both high power density and passively safe operation. Fast Reactors rely on “fast neutrons” to …

Fast reactors are nuclear reactors that are designed to maintain their neutrons at high energies. Fast neutrons can unlock the energy in the dominant isotope of uranium (U238) and thus …

Jan 18, 2022 · The fast neutron spectrum allows fast reactors to largely increase the energy yield from natural uranium as compared to thermal reactors. This high utilization of fuel can extend …

Argonne pioneered the development of fast neutron reactors and is a leader in their development worldwide. These reactors run on the fast neutrons from fission; the term is generally …

Feb 3, 2025 · Fast-neutron reactors represent a promising frontier in the realm of nuclear energy. These advanced reactors utilize fast neutrons to induce fission, enabling them to operate …