The Hanford Environmental Dosimetry Upgrade Project was undertaken to incorporate the internal dosimetry model c, recommended by the International Commission on Radiological Protection (ICRP) in updated versions of the environmental pathway analysis models used at Hanford. generation of Hanford environmental dosimetry computer codes is compiled in the Hanford Environmental Dosimetry System (Generation 11, or GENII). The purpose of this coupled system of computer codes is to analyze environmental contamination resulting from acute or chronic releases to, or initial contamination of, air, water, or soil. This is accomplished by calculating radiation doses to individuals or populations. The resulting second GENII is described in three volumes of documentation. The first volume describes the theoretical considerations of the system. a Users' Manual, providing code structure, users' instructions, required system configurations, and QA-related topics. The third volume is a Code Maintenance Manual for the user who requires knowledge of code detail. includes code logic diagrams, global dictionary, worksheets, example hand calculations, and listings of the code and its associated data libraries.

Mixing and dilution are characterized by a mixing ratio and a reconcentration factor. The mixing ratio, ' M p ' accounts for the dilution of the liquid effluent between the pOint of disCharge and the point of exposure, and is best determined from site-specific hydrological studies. If the temperature increase A-9 TABLE A-2. Generic Fractions and Concentrations of Hydrogen and Carbon in Environmental Media, Vegetation, and A. Fractions in Food Carbon Food or Fodder Water (dr~)-ffc w Fresh Fruits, Vegetables and 0.80 0.45 Grass Grain and Stored Animal Feed 0.12 0.45 Eggs 0.75 0.60

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This report documentsone of a series of scoping calculationsperformed as part of the dose code recovery activitiesfor the Hanford Environmental Dose ReconstructionProject. These scoping calculationsform a mutuallydependent set that build upon each other, and each is best read in the context of the others. The complete list of scoping reports is given below.