R 333.5011 Definitions; S.

Rule 11. (1) "Shallow dose equivalent" (Hs), which applies to the external exposure of the skin or an extremity, means the dose equivalent at a tissue depth of 0.007 centimeter (7 mg/cm2) averaged over an area of 1 square centimeter. (2) “SI” means the abbreviation for the international system of units. (3) "Stochastic effect" means a health effect that occurs randomly and for which the probability of the effect occurring, rather than its severity, is assumed to be a linear function of dose without threshold. Hereditary effects and cancer incidence are examples of stochastic effects. (4) "Survey" means an evaluation of the radiological conditions and potential hazards incident to the use of radiation machines. When appropriate, this evaluation includes, but is not limited to, tests, physical examinations, and measurements of levels of radiation.