Tennessee Code Title 68. Health, Safety and Environmental Protection § 68-202-301

(1) “Commissioner” refers to the commissioner of environment and conservation or the commissioner's designated representative;

(2) “Department” refers to the department of environment and conservation;

(3) “Person” means an individual, trust, firm, joint stock company, corporation (including a government corporation), partnership, association, state, municipality, commission, political subdivision of a state, any interstate body, any governmental agency of this state and any department, agency or instrumentality of the federal government;

(4) “Radiation” includes all ionizing electromagnetic waves and corpuscular emissions such as, but not necessarily limited to, gamma rays and x-rays; alpha and beta particles; electrons, neutrons and protons; and other nuclear particles but not radio waves or visible, infrared or ultraviolet light; and

(5) “Radiation source” includes material which emits radiation spontaneously, or apparatus which produces, or may produce when the associated controls are operated, one (1) or more forms of radiation.