fy with half times of 1 and 115 days, with 15 percent of the intake going to Soy Sy the 1 day compartment and 85 percent to the 115 day compartment. These data are consistent with preliminary data obtained by Brookhaven National Laboratory28 on the half time of the long term compartment. The average of 19 Marshallese males showed a mean of 120 days with a range of 75 to 182 for the long term compartment. For 18 females the mean value is 109 days with a range, of 50 days to 630 days. The model for ®%o is a three compartment model with half times of 6 days, 60 days and 800 days with 60 percent, 20 percent, and 20 percent of the intake respectively. More detail and example calculations for 137 Cs and 60 Co are given in Appendix D. Transuranic Radionuclides Metnodoalogy Inhalation. The inhalation model used for the various isotopes of . 29 y mle et : ; 1 plutonium and for 241,Anis thatone of the 1CRP Task Groups’ as adapted by Martin and Blooz. 30 mode] Tne oniy difference between Martin and Bloom's and the ICRP is thet the former cotdines the nasopharyngea) bronchial compartments into one. pulmonary compartment for the lung model are tions: and The dose is calculated only fer the so the difference is not significant, 27 oy Parameters . those of the ICKP “* with the following excep- The gut to blood transfer for plutonium isotopes is 1 x 1074 and for 74lan is 5 x 1074 32, also 24lan is assumed to be a class W compound while plutonium isotopes are class y 33 Ingestion. For the ingestion pathway the gut are as stated previously: 1 x 1074 for Pu and 5 x 1074 for Am. ~ a ii transfer coefficients 32 - The SEGcy ava