PGOLtobts ce, brits qrisgnot Mow ey anger cA hoteaty annem wm) INTRODUCTION ag ok hed on March 1, 1956, ae Bikini !Atoll,' BRAVO, the t ‘first of rive‘nuclear ueapons a tests in the Castle series, was detonated. 7 The BRAVO device’ caused substantial surface contamination oninhabitedatoll within a! a 2,000° square‘mile area. the grt Te “RSI vty ison safety . contaminated region was cigar shaped and included ‘Ailinginae,’ Ronge lap, S62 Pepi apopip gy “Ag The ies, 4 “a yl, ' Rongerik, and Utirik Atolls which lay east of round zero‘atdistances frow 60 raat to 300 miles. a , yoy nd thot - Tob ow aes tiv gd Soy . The fallout on Rongelap, initially visible at Wee‘hours, had Pedy Pe oe dp on ep ey eben sthyi rt ota thinned out to the extent that it was no longer seen.‘at “yelo’ hours: (6162). , , Vdd Yi as be teu \ y om a ‘ “Tad an abeas On March 3, 1954, the 64 residents of Rongelap Atoll and: 18 residents PY mee AP Ta a bee ad wee Loa ood eft vba atTRit> Phe gh ed road Whoa! 157 Utirik Atoll residents also took place. otra , On March 3 and 4, evacuat ion of - Sifo Island, Ailinginae Atoll, were evacusted. besaps tory Tne During the first few weeks and at wey og least once every year from "1957 to the present, a Brookhaven National Labovatory. w aygit . medical team, organized by ‘the Department of Defense ‘and’ ‘by the”“Atonic Enerey tet ' 1 ephadty tae Commission and its successor organizations, has.provided medical ‘examinations’ tox monitor the health of the persons initially affected ‘by‘the “fallout from the wun clear testing program, plus a comparison population, ‘Reporte ‘of their fiwlings “3 are given in Cr56, Co58, C059, Co60, Co62, Co63, Co6S, C067, Co70, Co7S, and C080. ee The Utirikese and Rongelapese returned to their home atolls in June 1954 and in June 1957 respectively. The earlier repatriation of Utirik Atoll wis based on the low level of external radiation exposure measured after the jiitial 3 month observation period (March to June 1954). The Utirik population was not examined by a Brookhaven medical team until March, 1957, when 144 people re= ceived comprehensive physical examinations. Following the 1957, medical survey, two men, removed from Utirik for medical reasons, were whole body counted at Argonne National Laboratory and provided urine samples for radiochemical inal1 & “8 4 j “Tray ms: teas Ue Less ans