a ep Table 5.1 8 se emt © . a0 ” . « ° of ‘ . oe eos 8 e a eo - oe . GROSS BETA ACTIVITY IN URINE OF RONGELAP GROUL we ye vere - im" wan3 meee1p hatewe va, so oe (Urine Collected on 46th Post-exposure Day and Values Corrected for Decay Back to Colleetion Diy) $ ‘ Total * . Age > 5 years Pa ‘ 2 Beta Activity d/m /24 hr 12000 3 150 5 155 23 40 33 54 69 Mein Case No. Ago + 16 yoars 712 894 , 4 7 Volume 24 hr Beta Activity dem ‘ld he 455 634 810 1700 201 313 9 355 223 10 980 549 260 80 455 0 28h 301 1l 13 14 450 340 780 1583 1677 2460 165 404 18 22 455 47 1670 77 - a th Total Volume -24 br Case No, t 30 960 438 34 750 570 37 480 792 40 550 1450 46 49 330 425 495 0 52 780 0 55 320 1080 Age 6 to 15 57 56 700 3220 years 58 750 2170 1900 0 60 62 810 980 580 1985 1032 0 63 66 635 -855 -68 71 73 300 290 230 2010 1450 0 20 24 - - 265 §50 — 550 1095 26 35 650 255 36 39 47 190 280 650 236 1100 1705 67 72 75 76 450 110 440 980 674 507 0 1180 78 79 80 82 965 465 540 670 52 2038 1353 2140 Meun 439 758 Mean 581 1208 ‘ ** Se. 2260 1715 group —25 per cent (of which 11 per cent is La'*, in equilibrium with Ba!*° at this time). Fis- sionabie material was not found in significant amounts in any of the urine samples analyzed. lodine-~131 was found only in samples analyzed at early time intervals, due to its relatively short physical half life. 5.4.2 Estimate of BodyBurden For estimating the human body burden of the various fission products, a semi-empirical approach, involving extrapolation from animal data, was used. Two Rongelap pigs werekilled after their average 24 hour urinary excretion of fission products was determined. All tissues were analyzed for total beta activity, as well as for Sr®*, Ba’, and the rare earth content (Table 5.2). By applying the ratio of animal body burden/urine excretion activities to the Rongelap native urine samples analyzed at about the same post-detonation time, a total human body burden of 0.33 uc, for post-exposure day 82 was obtained. If this total human body burden > » wenaae 93 2 \ i f} f ?