Section 7 CONCLUSIONS AND TOTAL DOSE SUMMARY Radiation doses are determined in this report for the crews of eight of the ships that participated in Operation CASTLEin 1954. Contributions to dose include fallout deposited on weather decks, shine while in proximity of contaminated vessels and from contaminated water, and accumulated radioactivity on hulls and in saltwater systems. Doses with uncertainties are calculated for the typical crewman through 31 May 1954 and thereafter if the daily increment exceeds 1 mrem. Film badge dosimetry is analyzed to establish its coverage of crew exposures and to compare with calculated doses. Cohort badging is assessed to determineits applicability to the crewmen involved, special exposures are identified, and periods of badge issue are estimated where inadequately documented. Suitable dosimetry is thus extracted for comparison with calculations over discrete periods. For most badge periods, the calculated dose lies within the distribution of typical crew doses, thereby affording confidencethat all crew-wide exposures are adequately incorporated. Where there is a wide distribution of badge readings, it reflects the diverse activities of crewmen. Where dosimetry is complete, the total calculated doses are generally in good agreementwith film badge totals for average crewmembers. Calculations lead to larger doses where gaps in dosimetry existed, reflecting unbadged radiation risk activities. It is concluded that the reconstructed doses well serve to complete the exposure records for crewmen whose 1954-totalled doses do not fully or accurately reflect their individual exposures. While readings for the film badge wearersare credible, 1954-assigned doses on the basis of cohorts or in lieu of missing readings should be considered for replacement by reconstructed values. The total calculated dose for each ship is presented in table 7.1. 107