PRIVACY ACT MATERIAL REMOVED the contamination on the helicopters was not easily removed (as evidenced by the deliberate decontamination efforts), and that a large portion of any wind-removed contaminants would have blown away from the ship by the constant prevailing winds. Nonetheless, it is assumed while being exposed on the hangar deck to the external for this analysis that YN3 radiation from the contaminated helicopters on the flight deck above him, was aiso downwind of the helicopters and inhaled contaminants that were resuspended by the wind. Wind-driven resuspension factors range from 107!9 t 107? mt, For a high-sided factor of 107 and conditions of exposure necessary to accrue a film badge dose of 110 mrem (the calculated dose while aboard the RENDOVA), the bone dose commitment is about | mnrem. internal Conversely, for an bone dose commitment of 150 mrem (the threshold meaningful internal dose), the film badge dose would have had to be 10 rem. for Thus, YN3 internal bone dose commitment is less than 150 mrem by two orders of magnitude. OPERATION CASTLE Operation CASTLE was conducted at both Bikini and Enewetak atolls in the PPG during March-May 1954. Although not a participant at CASTLE, YN3 was stationed on Kwajalein Atoll throughout the duration of the operation and was exposed to radioactive fallout from several of the detonations. ROMEO, and YANKEE. Kwajalein received fallout from Shots BRAVO, Dose calculations have been performed for personne! assigned to Kwajalein during Operation CASTLE (Reference 7). Since does not refer to any atypical exposure conditions while stationed on Kwajalein, his calculated fallout dose is 0.32 rem. The initial radiation dose is zero and the internal dose, based on | R/hr intensities (adjusted to H+1) at up to 100 hours after each shot (Reference 7), is less than 10 mrem. SUMMARY YN3 while assigned to the USS RENDOVA (CVE-114) at Operation IV*, received an external dose of 0.15 rem gamma. This includes contributions from fallout on the RENDOVA and on Japtan Island, as well as that from contaminated helicopters that were parked on the aft flight deck of RENDOVA. His bone dose commitment for the potentially high risk period (due to resuspended contaminants from helicopters) aboard the RENDOVA was about .001 rem. Initial radiation dose was zero. While assigned to Kwajalein during Operation CASTLE, YN3 that occurred on that atoll. received an additional 0.32 rem gamma from fallout , total calculated dose for the activities he has described is 0.47 rem gamma and less than .15 rem commitment to the bone. PRIVACY ACT MATERIAL REMOVED