Nets RIESE ie alban: AMEE othe ah tlhe nedblbccallye +, Settee taiewv 2s ’ =3— sles = Therefore the following computation is offered to help elucidate the relationship between the radiation dose sustained by a population due to exposure to netural background and that sustained by a population due to a given level of contamination of milk by gr”, This equation is possible since the quantity of milk consumed by the population of the United States is known even though the precise amount consumed by each individual during a specified pericd is not known. Using a factor for tke retention of ingested sr70 by the humen body, it is at once apparert how much ge70 is deposited in human bone per year in a given population. Calculation A Total dose due to background sustained by the population of the United States: | Dose (in rems) = (average background dose per person) (See reference 2) (number of people in U.Se) = 1.35 x 1072 reps x 1.5 x 10° = 2.43 x 10? reps to total population. Calculation B Total dose to a population from Sr” contamination of the population exposure vector milk: Assuming an ingestion period of 1 year to conform with background dose estimates (above), the following formula can be used to compute population dose: Dose (rems) = 14 fwa Io Teff $B (REE) N (qne006934/TeFE, (See reference 3} n