From research to industry
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation.
Discover the main research areas on which the CEA works.
Find the latest scientific and institutional news of the CEA.
The CEA publishes various scientific and technical periodicals and videos. Through them, you can discover the CEA’s major research topics and the latest technological innovations produced by its laboratories.
Monograph | Nuclear energy | Nuclear physics
Neutronics (or neutron physics) is the study of neutron paths through matter, of conditions for a chain reaction, and of alterations in matter's composition induced by nuclear reactions. It makes it possible to design and operate nuclear reactors and fuel cycle facilities. Using data from the quantum world (i.e., interactions between neutrons and atomic nuclei) to compute quantities such as a reactor's power, neutronics fills a gap between the microscopic and the macroscopic worlds. Due its multiscale character it works on time, space and energy scales extending over more than a dozen orders of magnitude. Born in 1932 with neutron discovery, neutronics is a fully mature science which however keeps evolving: for the steady increase in computer power upsets computational methods, questions experiment's status, and broadens the outlooks of numerical simulation. One of the current challenges is coupling neutronics with thermal-hydraulics and thermal-mechanics so as to simulate reactor behaviour. This monograph gives an overview of neutronics referring to both research and applications, and highlights some outstanding results recently obtained.
CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.