‘Unmary excretion of radionuclides @P S Hargis er au from "I gamma spectrometry measurements, and esti- mates of concentration of various radionuchdes, im par- ticular, Im pooled urme samples These data, though long overdue m easily accessible literature, are vitally importantto assessmg the doses recerved by Marshallese and Americans from the Bravo nuclear test of 1954 In addition, herem, we have corrected the erroneous assumptions first presented by James (1964) that the LASL urine samples were partially composed of urme from children Limited data were acquired on children in other samplings leadmg to estrmates of excreted ’Cs and “Sr For completeness, we also present most of the available bioassay countmg data from the HASL and NRDL previously available only m laboratory reports, though wedo not mterpretall of those data as there were many methodological- and imstrumentation-related limtations to the data Urme volumes, on an individual or populationaverage basis, were smaller than expected based on bioassay experience in locations with temperate climates, but are, nonetheless, reasonable when considering per- spiration and insensible water losses through the skin whichtypically occur at much higherrates in a tropical chmate Moreover, there was considerable consistency of the distributions of urme volumes over many different sampling dates and by four different institutions, particularly when the limitations imposed by relatively small numbers of samples are considered Estimates of mtake of radioiodmes and 1odimeprecursor radionuchdes for the Marshallese groups do not vary greatly among several assessments conducted over the period of 55 y and all appear within the range of the hkely uncertamty of estimation These radioiodme assay data are a particularly cogent example of the importance of bioassay data followmg events mvolving environmental contammation and exposure ofthe public and clearly mdicate that the uses of such data may continue well beyond the mmediate events that caused the exposure Acknowledgments—This work was supported by the Intra-Agency Agree mentbetween the NabonalInsbtute of Allergy and Infectious Diseases and the National Cancer Institute, NIATD agreement #¥2 Al S077 and NCI agreement #¥3-CO $117 The authors appreciate the helpful comments of ther calleagues, Andre Bouville, Harald Beck, and Dunstana Melo REFERENCES Anderson EC, Schuch RB, Perrings JD, Langham WH The Los Alamos human counter Nucleomcs 1426-29, 1956 Beck HL, Bouville A, Moroz BE, Simon SL Fallout deposition in the Marshall Islands from Bikim and Enewetak nuclear weapons tests Health Phys 99 124-142, 2010 227 Bond VP, Conard RA, Robertson JS, Weden EA Operation Castle Addendum Report Project 41A Medical examina tion of Rongelap people six months after exposure to fallout Bethesda, MD Naval Medical Research Institute and US Naval Radiological Defense Laboratory, WT 937, 1985 Bouville A, Beck HL The HASL gummedfilm network and ts use 1n the reconstruction of 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