Te ee wes 2a as Ta t a TE TEvhalWED rene 1M OY ageshe. ASE peat palit eksty. Settee ae oT pa kur wee a fy face ates Denea, ea re : eRe was ey hd Ley OT OES GRAS Late SOMERS Bn Pakaoan Sees adv ha FIRB ARC LTR LR SCARE Th PER fe a nee Seest eel eo Les aah Ne oe leaeat AEN . neOT Tot Pipers phir e ied aa Rab a tTee Pas 2 a BeeniePe m2 Syig ¥E ie ry 5 Ct. 4 Rae 2f rt e. a By eseetl aS aise age See 1 7, - wf RAY ena aEe i + MP Nae” reFels i Y eh ip2 DN! Ea le fea epee: ee. “ MSS FALLOUT FROM NUCLEAR WEAPONS TESTS 1335 Miller ottained an effective half-time of 110 days for the elimination of zn, and for the two subjects from Utirik the urinary to fecal excretion ratio was 1/9. Asauming the excretion to be entirely exponential and 1C percent of the body burden of mn65 excreted in urine, the March 1958 urinary excretion levels of 174 end 342 micromicrocuries indicete body burden, equiliprium body burden, | and daily intake as follows: ‘ RONGELAP 1954 Exposed Group Control Group (Unexposed 1954) Body Burden (March 1958): 260 muc (+ 494) 540 mec (+ 903) Equilibrated Body Burden: 330 muc 650 muc Daily Intake: 2100 wuc/doy 100 uuc/day Percent Equilitration: 85.0 percent 83.0 percent ae ne ws The mean body burden estimated fron 19598 excretion analysis for all Rongelep subjects showed a ten-fold increase over the 1957 whole body measurements. This increase correlates with the return of these people to Rongelap atoll from Majuro. Also the 1958 Rongelap mn©? burdens are comparable with the Utirik subjects in 1957, and the Utirik subjects vould have been in equilibrium in 1957 (half time of 110 days for the elimination of zine®?), The estimated intake of zinc 3 {2000 to hooO wue per day) can not be accounted for by zn) activity levels reported in foodstuffs. Although thts radio-nuclide reportedly accounts for a lerge fraction of the total activity in fish, this amounts ta only about six uuc per pound of muscle up ta 75 uuc per pound of whole fish (2) or at most four percent of the estimated intake. CONCLUSIONS . Since resettlement of the Marshallese people on Rongelap atoll in July 1957, the urinary excretion level of cestunt 37 has increased about 140 fold and about # Assuming 100 percent absorption Cran tne OF Tract od ‘