1346. II. FALLOUT FROM NUCLEAR WEAPONS TESTS In the case of cesiwm and zine: * : s(t) =a (2 -o ®t) 4 8, gat x is the daily accretion in uc/day, and 8, is the body burden in uc at t = 0. ” x # =-as +X 5 -8 iajeot +a(l- ety] +x = -E(t) + x ‘ x xP(t) = E(t) = a fe** +a Ql - ety M= lin s(t) = x F t —» 00 zine?? a = 6.3.x 10°? days") (t1/2 = 110 days) k = 10 BF 0.03 ue Cesium? 37 a= k.€ x 1073 days") (t1/2 = 150 days) B= So k= lf 06 #The urinary/fecal ratio of rediocesium for human subjects is about 5/1, so that ~ eetimates of body burden are too low by about 20 percent. A-3 NU Relee