30 T 35000-| T TT T v RONGELAP — | 3 > a 5 a m ' ' 4 DEVIATION 7 , . +1! STANDARD Z x0000+ = OF TF +1 STANDARD 25000- ERROR Bh S = +676 2 > 458] a 20000- 5 J 15000 F a 2 10000 % Ls ' 1T §000 , 0 49 1 °o kt o i Lg + IBS 9 L mT t t fm 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 TIME PAST REHABITATION, days Figure 4.3 #1. 6 O Adult cesium-137 body burden as a function of tike since resettlement of Rongelap Island in 1957. The maintenance of the body content depends on the radionuclide intake from the diet. The physical half-life is 30 years; fEhe physiological half-life is 110 days in men, 80 days in women, and less in youths and children. (1 Bequerel = 27 picocuries: 1 nanocurie = 1,000 picocuries) The maintenance of the speaific activity of 1 pCi/g in soft tissue for 1 year gives rise to dose of .01 ren. (Figure courtesy of E.T. Lessard, Brookhaven National Labor tory.)