and if the bones and the liver each is approximately 0.013 pCi, compared receive 45% of that in the blood, with the annual amount of 0.365 pCi then the bone and liver burdens of computed from the urine concentrations New York residents should each in- reported by Ref. 2. crease by 2.1 pCi annually. suggest several possible interpreta- However, a 4.2 pCi increase is nearly twice These results tions: the present New York total body 6 The urine samples were contam- burden accumulated since 1954,° The inated at the time of collection, plutonium concentrations reported for and the plutonium concentrations the urine of the Bikini population are actually significantly below would, those reported. of course, indicate body burdens ten times higher than those e The transfer coefficient across of the New York population. the gut for biologically com- Bennett's data> can also be used plexed plutonium is much higher to predict the quantity of plutonium than 3 X 10>, the value devel- expected in the urine as a result of oped from animal studies with the body burden accumulated since various plutonium compounds. 1954. The major source of input from @ The transfer to urine from the the accumulated body burden to the blood for ingested plutonium is blood, greater than 84. and subsequently to the urine, e The direct transfer of inhaled is from turnover in the lungs and lymph nodes, which have half times plutonium to the blood from the of 500 and 1000 days, respectively. upper respiratory tract is Bennett's data show an accumulated greater than 14 (Ref. plutonium burden in the lymph-nodes 17). -@ The estimated intake values of 0.40 pCi and in the lungs of through food, water, and air are 0.12 pCi for a typical New Yorker in incorrect. the year 1974. The plutonium appear- e Any combination of the above. ing in the urine from these two com- Interestingly, the plutonium body partments during the next year would distribution models 3,16,1/ and the be 0.013 pCi. Bikini pathway data (Tables 6 and 7) The contribution to the urine from inhalation and inges- show that the major fraction of tion of plutonium during the current plutonium presently entering the year would be 0.0002 pCi. urine is by ingestion. (See The absolute Table 7.) Therefore, the expected quantity of plutonium predicted to annual excretion from previous body reach the urine as a result of this burdens and present ingestion pathways annual intake is 1.4 * 10> pci, -14- I010234 -