Te aerate rae ps gray Loar maicing allowance for factors giving maximum values of time and intensity, that personnel were not axposed to dosages mech higher than calenlated. This is particularly true inasmich as Rongerik calculations were in good agreement with observed film badge data on personnel there. 2. +4 1. Medical evaluation of personnel exposed to the radiation from fall-out in case of BRAVO depends to a great extent upon the accuracy with which dosage can be computed. Based upon extrapolation of fall-out time from Rongerik data where the fall-out time was precisely determined by automatic recording instruments, it seams plausible to conclude, after Ce MEDICAL ASPECTS OF FALL—OUT FROM BRAVO The essociation of symptoms with a given dosage may lead to er= roneous conclnsions since such tabular relationships have been devised o- only for whole body penetrating radiation given over a period cf a few ginutes. It is now generally believed that the symtoms in those tabula tions will appear with a «naller dose than indicated. These personnel may develop signs ar symptoms out of proportion to what would have previously been expected but could be sanewhat tempered by the relatively slow dose rate characteristic of fall-out. 3. With respect to natives, due to the language difficulty, it was extrenely doubtful that information obtained by questioning would be reliable. he We may draw certain conclusions, however, which seem to be sound 5. Considering the personnel involved in exposure to radiation thay can be grouped according to location: a. Bongerik Twerty-eight Americans were exposed showing film badge readings ranging from 40 to 96 roentgens during a period of 28.5 to 35 hours. They were evacuated to Kwajalein. It was not expected that any of these men would develop any subjective symptoms. Ons admitted to feeling badly until reassured after which he adritted that his feeling was probably psychologiodl. First blood counts taken on D plus 1 showed a normal distribution. Generalized loss of hair which usually cecurs after 10 days with sufficient dosage was not expected and has not occurred to date. Levels of persomnel contamination were not exceedingly high and inaemeceh eet as decontarination was performed on D plus 1, beta burns are unlikely. Pu. cs Ta received. cpap= ~~” concerning immediate prognosis based upon the doses believed te have bee