Concentration of Pu in urine — measured vs predicted. Table 7. Estimated annual Location intake, pCi Inhaled Ingested New York 0.2 Bikini 1.6 0.2 513° Predicted annual Pu in urine; computed from estimated annual intake Total pCi % from ingestion % from inhalation 0.0002 Annual quantity of Pu excreted in urine, pei 97 0.0014 0,365 14 “Model and parameters are those summarized in Refs. 3.65 3 and 17. computed from assumed excretion rate of 1 liter/day and concentrations reported by Ref. € ; ae as . . 2, Sum of estimated Bikini intakes for drinking water, terrestrial foods and marine foods from Table 6. Bikini residents. This computation The reported concentration of shows that plutonium levels in the plutonium in urine from the New York urine should presently be at least population is 10° pCi/liter.* seven times higher at Bikini than at assume a urine excretion of 1 liter/ New York. day per person, the total plutonium This ratio is very similar If we to that reported to us for plutonium excreted via urine per year would then in recent urine samples: be 0.365 pCi. a Bikini/ New York ratio of about ten. (See Table 7.) Bennett estimates the total annual intake of plutonium via food, water, and in- These analyses indicate that the differences observed in the plutonium halation to be approximately 1.8 pCi concentrations in urine of New York for a person in New York. > and Bikini populations can be values then suggest that 20% of the accounted for by the estimated dif~ intake is appearing in the urine. ferences of plutonium intake via food, This is a much higher percentage than water, has ever been reported? and air, based on the assumed dietary and inhalation intakes. These and is higher than percentages normally used for How- model predictions.>?-? ever, the absolute quantities of excreted plutonium predicted by Only 8% of the amount of plutonium models i°?+? based on the same dietary entering the blood reaches the intake values (given in Table 6), do urine, 1? while 90% of the plutonium not agree with the urine concentra- entering the blood is equally parti- tions recently reported to us. tioned between the liver and the Table 7 compares quantities computed bones. 27264? from the reported urine concentra- (the total plutonium excreted in tions with the quantities predicted urine per year, based on the con- from the pathways and models for centrations reported for New York) New York and Bikin1i. is 8% of the plutonium in the blood, -1)]3- Wg 0233 Thus, if 0.365 pCi