A-Estimoted dose rate at D+1l (Dunning, 1957) Milliroentgens per hour 4 10" 10 J \ | Operation Xt \! Gamma Dose Rates on XN Kabelle |sland I 4 Hardtack \ \ —— Theoretical decay T'? \ —— Theoretical decay of U2>* fission products as measured by the AN/PDR-39 (TIB) radiac at 3 feet above an infinite plane 10! (Miller and Loeb, 1958) T T 10 10? 9 00 38 ‘ses7. sRRrES 1o° Days after March 1, 1954 and March 1 of each year indicated Fig. 3. Decline of Gamma Dose Rates at Kabelle Islet. 14 10