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