Food irradiation & Radioisotope batteries are examples of industrial applications of radiation sources. 

Food irradiation is the process of exposing food, either prepackaged or in bulk, to controlled levels of certain types of ionizing radiation to increase storage life of food, to reduce post-harvest food losses, and to inactivate specific food-borne pathogenic organisms.

Radioisotope batteries are devices which use energy from the decay of a radioactive isotope to generate electricity. Like nuclear reactors, they generate electricity from nuclear energy, but differ in that they do not use a chain reaction.