Table 5.1 7 wee . 8 oe * an + « 2 oe en oe . s . . « GROSS BETA ACTIVITY IN URINE OF RONGELAP GHOUD t (rine Collected on 46th Post-exposure Day and Valucs Correctad far Derny Back to Cotleetion Drv) Total f AsUy hh Saipans oo Volume 44 hr ’ Case No, Age 3 vears 2 ye a 5 23 3a o4 69 Mean Total Beta Activity d/m/24 hr Case No, Age - 120 Tle 150 155 40 260 80 459 894 31s 223 0 285 301 165 404 «16 vears 4 455 ti34 810 355 930 450 340 780 455 47 1700 201 549 t583 1677 2460 1670 77 320 960 408 34 TH 370 ST 480 TM2 40 46 49 550 330 425 1450 495 v 55 "56 320 700 1080 $220 58 750 2170 57 years 20 265 1900 60 0 1032 0 236 1100 1705 674 507 0 $50 1095 810 75 440 980 1180 82 670 2140 Meun 439 758 Mean 581 1208 0 80 980 635 -855 300 290 230 965 465 580 550 650 255 190 280 650 450 110 ‘ 62 63 66 -68 71 73 78 79 780 24 26 35 36 39 47 67 72 76 ; Hota Activity demo ud hr 7 9 10 1D 13 14 18 22 52 Age 6 to 15 Volume 24ohe 540 = 1985 2260 1715 2010 1450 0 52 2038 1353 group — 25 per cent (of which 11 per cent is La‘, in equilibrium with Ba!*® at this time), Fis- sionable material was not found in significant amounts in any of the urine samples analyzed. lodine~131 wag 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 were killed 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 pc, for post-exposure day 82 was obtained. If this total human body burden 93