[This page has been added tp the reprinting of the Report to show that the Jones factors from England and the Moss factors from Los Alamos are within approximately a factor of two of the Leggett & Eckerman factors from Oak Ridge; see page 80.] OAK RIDGE NATIONAL LABORATORY POST OFFICE BOX 2008 OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC. OAK RIDGE. TENNESSEE 37631 FOR THE US DEPARTMENT OF ENERGY May 24, 1990 Dr. Henry I. Kohn 1203 Shattuck Ave. Berkeley, Ca 94709 Dear Henry: ’ Please find tabulated below the urinary excretion rates (d‘') per unit intake rate (d‘) for continuous ingestion of Pu. For example the values represent the pCi/d excreted in urine per pCi/d ingested. The excretion rates are based on the soluble form (f, = 10°) and the urinary excretion function tabulated by Leggett and Eckerman (Health Phys. 52, 3, 337-346, 1987). This excretion function is consistent with all source of information on Pu excretion. Urinary Excretion Rate (d"’) per unit rate of ingestion (d”) bs Time (y) Excretion rate 1 _ 2.23 x 10° 2 2.88 x 10° 5 4.62 x 10° 10 7.05 x 10° 15 1.02 x 10“ 20 1.30 x 10° 25 1.57 x 10° 30 1.68 x 10° | If you have any questions please give nie a call. Sincerely Keith F. Eckerman Group Leader, Metabolism and Dosimetry Research Group KFE:rrw 5000661 -80-A-