Tehnika haru, mis tegeleb tuumaenergia rakendamisega ja radioaktiivsete nukliidide kasutamisega. Eelkõige hõlmab tuumareaktorite ehitamist ja kasutamist ning tuumkütuse tootmist; valdkonda kuulub ka kiirituskaitse.
After obtaining the opinion of the Economic and Social Committee the Commission may, within the framework of the Joint Nuclear Research Centre, set up schools for the training of specialists, particularly in the fields of prospecting for minerals, the production of high purity nuclear materials, the processing of irradiated fuels, nuclear engineering, health and safety and the production and use of radioisotopes.