or sickness ang ather factore,.Regardless of the,couse of indiyidue),gi ffer- ences from the wean, a smooth,degcription, of the body burden and activity ingescontin a declining basis On+ thie me : . 1 tion rate for, the. population 4 could be . adopted. of to Internal Dose Equivajent oa, ; vous uptake model was used. Rates ue de bes co, a Dog, The spproximate instantaneous dose equivalent rates for the total body were determined from the body, burden data illustrated in Figures 7, and 8 and from the following equation|, vad it = ql, to the total body doseequivalent rate, aRen y~!, ia = where (4) Tee I = equilibrium dose equivalent rate to the total body per unit body instanteous bady burden, pCi. The approximate nature of the estimate was due to the assumption that the radioactive atoms were distributed among the body tissues as they would be following constant continuous uptake for periods of time much greater than the mean residence time for the total body. assumed. In the case of 90, 86% of equilibrium was These assumptions were not used in the estimate of the total dose equivalent. In addition, since mean adult body burdens were computed, a factor of 1.2 was needed to adjust for differences in body mass relative to a 70 kilu~ gram adult, Table 5 lists values of I which were determined from information given in ICRP59 and corrected for body mass differences. 30 ‘yrgr, ‘ws 1 tegeerse a tear ro otig wR ete We te ge ater lal rae . tte Looe. eo cae 8 * m m=) i TS, Ser hy Seo rr Ne aie % RSS Gee ig burden, mRem y~! yen, ot