rate constant (K,=0) was used for Zn, the dose equivalent rate for the average adult was in excess of Federal Radiation Council Guidelines for the first 2 years following the return to Utirik. =» * he. Internal Dose Equivalents Disintegrations occurring in the total body of an individual during residence following repatriation were determined by several methods. Equation (3), together with personal body-burden histories and atoll-specific dietary rate con- stants from Table 3, provided an initial estimate of disintegrations between consécutive body-burden measurements. The *gcond method used was a log-log plot of the subject's body-burden history and an algebraic determination of area between two consecutive measured points. subject's body-burden history. The third method used a linear plot of the The area under the curve was cut and weighed and compared to a standard weight of known area. Quality control procedures required that all three methods agree within 10% before a subject was assigned his or her total body disintegrations during residence post-return. In general, the methods compared to within +5%., After the total number of disintegrations occurring in a subject's body were assigned, they were apportioned among the body organs according to the following equation . . £52 5A,B. (ARE. D. + In2/A) ECD. (2 A.B, + In2A) © (5 where F = the fraction of total body disintegrations occurring in the organ of interest, A. = organ compartment deposition fraction for the element, 36