4.3 DOSE CALCULATIONS FOR USS COCOPA (ATF-LOL). Dose calculations for COCOPA on 1-2 March 1954, when BRAVO fallout was encountered,are detailed below. Time periods below deck are indicated by an asterisk (*). After 2 March, the daily film badge doseis calculated by multiplying the contributions to exposure, both topside and below (from table 3.3), by the appropriate time-averaged shielding factor or apportionment factor. Contributions from each source are summed and converted to a film badge dose. Cumulative film badge doses are given in table 4.3. Dose calculations are carried out through 22 June 1954, when dose accrual falls below 1 mrem perday. Integrated Fallout Intensity (mR) x Ship Shielding Factor = Adjusted Davy Time Period Exposure (mR) 1 March 0000-0600* 0 0600-1200 0 1200-1330* 5.0 0.1 0.5 1330-1700 51.7 1.0 51.7 1700-1800* 42.0 0.1 4.2 1800-2000 166.6 1.0 166.6 2000-2400* 362.5 0.1 36.3 627.8 (table 3.3) 259.3 1 Marchfallout dose = (259.3 mR) (0.7 mrem/mR) = 181.5 mrem (table 4.3) 2 March 0000-0800* 476.1 Q.1 47.6 0800-1200 98.2 1.0 98.2 1200-1330* 30.0 0.1 3.0 1330-1700 70.0 1.0 70.0 1700-1800* 19.0 0.1 1.9 1800-2000 2000-2400* 36.9 1.0 36.9 _65.7 0.1 6.6 795.9 (table 3.3) 264.2 2 March fallout dose = (264.2 mR) (0.7 mrem/mR) = 184.9 mrem. Dose from shine and ship contamination = 18.3 mrem. Cumulative film badge dose through 2 March = 385 mrem (table 4.3). 75