Internal Dose 1
Internal Dose 1 : Radiation and Radiological Disasters. (a) Refers to the amount of the environmental contaminant absorbed in body tissue or interacting with an organ's membrane surface. [NRC, 1991: Human Exp. For Airborne Pollutants]; (b) That portion of the dose equivalent received from radioactive material taken into the body (e.g., "internal sources"). [USDOE, 1998: Radiological Control Manual] (c) The amount of a substance penetrating across the absorption barriers (the exchange boundaries) of an organism, via either physical or biological processes. For the purpose of these Guidelines, this term is synonymous with absorbed dose. [USEPA, 1992: GL for Exposure Assessment] [USEPA, 1992a: Dermal Exposure Assessment] [REAP, 1995: Residential Exposure Assessment Project] [USEPA, 1997b: Exposure Factors Handbook]; (d) In exposure assessment, the amount of a substance penetrating the absorption barriers (e.g., skin,, lung tissue, gastrointestinal tract) of an organism through either physical or biological processes. (See: absorbed dose) [USEPA, 1997a: EPA Terms of Environment]; (e) The amount of pesticide absorbed through the exchange boundaries of the body (equivalent to the absorbed dose). [USEPA, 1998: Postapp. Exposure Test GL.] [Cf. Absorbed Dose]
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