Usu os film badge data. Bongerik to quantify the: allous. building curve~ wpelope and downslope, and?eo: extrapolate this“ information: to*‘Rongelap and Ucirdk, " Determine the 6/y ratio ‘and thus evaluage the contribution of 8 dose in estimating the y depth dpees for example, the 6 activity dosea dug to «* ». 1 ‘ 5 TGs 5 pcan Neptunium-239, tag Plot all the available besQn external ‘radfation and‘Netermine decay factors, The question to bestats will be: Do the data result: in a curve similar to the estimates T~! 5 relationship, or, does it exhibic different. es, such. as 770.83, T-1.2 duetee’‘weathering or other: factors? -, 6. Examine the question on internal dose estinations fron, rine nalysis, food ingestion, inhalation and data from animal studies. “oy rocess all available information onvdiet and lifestyle would: be: ¢ hed ‘to derive tealiatic dose estimates: fron external andinternal ¢ sour es. ae 7. .+ Examine other studies dope elsewhere on the thyroid nodu eS)._ocniamp le: the 2h Chicago Group Study, and:also the use of 1291 to determi, @:the ‘early thyroid: doses. Wistoric samples.collected soon’ after fallout:wt leheey in determin: ing the! !297 concentrations. -In addition, “99T¢' would!algo-be it is known to be retained inche bby yroid gland. Tf.ere glands yould also be aL,for I TLconcentrations, : Use a "state-of-the-art ae thyrod, wd puter simulation program‘to‘alors ‘te transpert and deposition of. radlogegive fettout f following the mpANP es sain study. should give: 58 os b. c. : : g 6 [ #3! Aa * be ! plots of integraged? air concentration isopleths.for! fleafos!ppoducr: fodine, cesium and gtrontium ey i deposition iso let for the aforementioned fissior | prodcts. plus 239Np/239Pu if poss ble, and Oe iy | time plots ofthe buildup and decline of airborne falloug Goncentra~ tions near sea level at the points of interest, and/or’ therpullding of ground deposited ‘fallout, ! tad 28 Status of Study: ot External Radiation Measurement a. a * 8 a. 1. Feruined gine De y 8. oe %} Ge! pa ws Figure 1 shows a plot of the gamma dose rate in rogntgens per hour at three feet above ground at 24 hours after the BRAVO test explosion. Figure 2 shows the estinated total dose contours in roentgens at 96 hours after the BRAVO test explosion indicating 175 rads of whole body gamma radiation for the Rongelap inhabitants and 14 rads for the Utirik inhabitants. In view of these observatiuns, an exhaustive search of all reports generated Tables 2 and 3 for Rongelap and Utirik respectively. Figures 3 and 4. This data has been plotted in These plots will be furrher examined when results from Item 8 ahove will be received. ee