4.7 DOSE CALCULATIONS FOR USS PC-1546. Dose calculations for PC-1546 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 dose is calculated by multiplying the contributions to exposure, both topside and below (from table 3.7), 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 4.7 and are carried out through 11 July 1954, when dose accrualfalls below 1 mrem per day. Integrated Fallout Day Time Period 1 March 0000-0600* 0 0600-1200 Ship Shielding Adjusted Factor Exposure 0.4 1.0 1200-1900* 189.7 0.1 1900-2100 171.4 1.0 2100-2400* 245.5 0.1 0.4 19.0 171.4 24.6 215.4 Intensity (mR) Xx 607.0 (table 3.7) 1 Marchfallout dose 2 March = (215.4 mR) (0.7 mrem/mR) = 150.8 mrem (table 4.7) 0000-0800* 431.9 0.1 43.2 0800-1200 138.6 1.0 138.6 1200-1330* 42.2 0.1 4.2 1330-1700 75.4 1.0 75.4 1700-1800* 18.2 0.1 1.8 1800-2000 31.8 1.0 31.8 2000-2400* 57.9 0.1 _5.8 796.0 (table 3.7) 300.8 2 March fallout dose = (300.8 mR) (0.7 mrem/mR) = 210.6 mrem. Dose from shine and ship contamination 8.6 mrem. Cumulative film badge dose through 2 March = 370 mrem (table 4.7). 80