PRIVACY ACT MATERIAL REMOVED period is 6.4 mR (light fallout occurred on the RENDOVA during the early morning of 4 November). Thus, the total integrated intensity to which YN3 . waS potentially exposed during this period is 248.4 mR. This analysis assumes that between 1-4 November, YN3 spent 60 percent of the day topside on the hangar deck with no shielding and 49 percent delow decks. While below, he was offered a shielding factor of 0.06 by the ship's structure (Reference 2). (Typically, a crewmember is assumed to spend 40 percent of the day topside and 60 percent below). The dose calculations for 1-4 Novemberare as follows: Dosey _4 Nov 7 (.25 R)(0.7 rem/R) [o.6(1) + 0.4(.06)| = O.ll rem. During the period 5-18 November, it is assumed that YN3 spent approximately 85 percent of each day either topside (on the hangar deck) or on Japtan Island. Trips to Japtan are assumed to have lasted for six hours. The free-field integrated intensities on tve RENDOVA and Japtan during this time period are 59.3 mR and 62.2 mR, respectively. Again, while below deck, he was shielded by the ship’s structure. The dose calculations for the period 5-18 November are as follows: Doses 19 Nov = (0.7 rem/R) [/24to.062 R) + 14/24(0.059R) + 4/24(.059R).06) = 0.04 rem YN3 total gamma dose while at Enewetak during the period 1-18 November is therefore 9.11 + 0.04 = 0.15 rem. . also states that he swam in radioactive water while he was a lifeguard on Japtan Island. Water samples were obtained off Miramar Beach (Parry Island) on 3, 4, 6, 7, 8, 9 and 17 November 1952. Activity was noted only on 4 and 6 November when water sanples showed activity concentrations (beta-gamma) less than one-tenth the naximiim permissible concentration; it was concluded "that swimming at Miramar Beach involved 10 hazard because of radioactivity" (Reference 6). Samples obtained between Parry and Japtan islands revealed even less activity than those at Miramar Beach; hence, swimming off Japtan would have provided no significant dose contribution. DOSE DUE TO INTERNAL EMITTERS During YN3 exposure to contaminated helicopters in the period 1-4 November, the possible inhalation of resuspended fallout is considered. It is noted that PRIVACY ACT MATERIAL REMOVED