SECTION 6 CONCLUSIONS AND TOTAL DOSE SUMMARY For Operation CASTLE, calculated doses and dosimetry data for the crews of three ships are, for the most part, in good agreement. During badged periods when exposures were relatively high and radiation environments were well documented, the dose calculations correlate well with the dosimetry data. For periods when topside intensities were not documented, generally late in the operation when radiation levels were low, agreement between calculated doses and dosimetry is not as good. A ship contamination model is used to estimate crew exposures due to radioactive water contaminating the ships' hulls and saltwater piping systems while in Bikini Lagoon. During the first two badging periods, doses accrued due to ship contamination are masked by the much higher contribution froin BRAVO and ROMEOfallout. During the last badge period when fallout was not a significant factor, the SIOUX remained in contaminated water of known intensity for a five-day period. Doses calculated using the model are in excellent agreement with the film badge doses recorded onboard the ship. Table 6-1 summarizes the calculated dose contributions due to fallout as well as from ship contamination for the sixteen ships considered in this report; Enewetak and Kwajalein Atoll fallout doses are also listed. The total dose (with bounds) is tabulated and, in the absence of dosimetry data, should be used for dose determination. The calculated distribution in dose due to the spatial nonuinformity of topside radiation intensities is not reflected in the mean total dose or its bounds (see Section 4). 163