62 TABLE N.7 #4 PLUTONIUM-239: FRACTION OF ORAL DAILY INTAKE EXCRETED IN URINE 9/5/ It is assumed that the daily intake is constant over the period specified. Elapsed interval Jones (years) 1 3.62 x 10-5 5 6.2 x 10-8 8.61 x 10-5 20 29 Moss (old) 10 «/ Fi: = .00l1. | (new) 5.42 x 1075 -- 1.71 x 1.31 x 10-4 2.3 x 10-4 1.67 2.92 x x 10-4 1074 10-4 The table's data were supplied by Dr. E. T. Lessard of the Bgookhaven National Laboratory. I have used the Moss factors (Moss, 1988). b/ The intake can be calculated by dividing the urinary excretign by the factors given. For example, after 20 years of intake, the daily excretion is found to be 3 x 10-5 picocuries. (3 x 10-5)/ 2.3 x 10-4 = .13 picocuries/day. Then the intake ig: