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. Internal Dose Equivalents Disintegrations occurring in the total body: of an individual during resi dence following repatriation were determined by several methods. Equation (3), together with personal body—burden histories and atoll specific Kg Yate constants from Table 3, provided-an initial estimate of disintegrations between consecutive body burden measurements. The second method used was a log-log plot vf the subject's body burden history and an algebraic determination of area between t-o consecutive measured points. csunivet's body burden history. The third method used.a linear plot of the The area under the curve was cut and weighed and commared to a standard weight of known srea,. Quality control procedures required that all three methods agree within £10% before a subject was assigied his or her total body disintegrations during residence post return. In gene:al, the methods compared to within 15%. After the total number of disintegrations occurring in a subject's body was asSigned, they were apportioned among the body organs according to the fui- lowing equation Fs fo EAAB: (B5C;D, + Ind/r) ; 2 EAB +t In2/r) orC.D, ’ (5) y: h’ "4it where F = the fraction of total body disintegrations occurring in the organ of * : interest, A. 4 74 i . = organ compartment deposition fraction for the element, 36 fone STR Pecape ee ge ee NOPE ter mre 7 7 ’ . a Sele ML nee om