CONTENTS Page - ADSETACE weer ccc r cer verse cera reseasnerenssresssaseseeresersveees Acknowledgments. ccccccccccsccccccesccrscseescssesscceraseceseces INtCroduction..csscccccrevcrccccencneeeseneevsseeessesecesesnsenns Methods and Results. ..ccccrcccsensvcvscvesesscevvcccvsseseccseses I. II. III. I-131 Thyroid Burden at Rongelap Island Based on Urine BLOASSAY . ccc ccc nrc cece rc ccer es ce ence ccc e eee en eesseeeseeses Radioiodine Air Concentrations Based on Meteorological Data and Source Term Data..ccrcrcvcrenvsescccccccccsvecsces Radioiodine Surface Activity Based on Archival Soil Ana lysis IV. for TH=129 cc ccc cere r enone ct seseceesceserecccses Thyroid Absorbed Dose Estimate Based on Bikini Ash Results and Results from I, IL, and IIT... ccc cc cscs ccscece A. Surface Radioactivity And Exposure Rate Estimates...... B. Radioactivity In Food, Water Supplies and Air.....c.ee.s C. Absorbed Dose for Individuals....cecsecccvcccccercccves DISCUSSION. cc ceccccaccecscneccencccresnersesreessrececsceenscseee CONCLUSION. cc ccc eves vce ener ees eneraeseseeseaseresasesssssnesesacs