10 e 74 mz 54 S N= 21 84 3So a e 3/30/54 - 5/2/54 9 - Calculated dose: 323 mrem 6 4 —| 44 gE 34 3 z 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 Film Badge Dose (mrem) Figure 6.2. Film badge dosimetry for USS SHEA (DM-30). are similar (light fallout following Shot UNIONand working in the same contaminated watersof the lagoon); therefore, the dosimetry for these ships would be expectedto reflect similar exposures to radiation during corresponding badging periods. There are three badging periods on RECLAIMER,each being approximately one week long. During the first two periods (13-27 April), minimum exposure potential existed for the crew. Workingin the northern lagoon, they were exposed only to very low levels of contaminated water. Although Shot UNIONdid result in some fallout on the ship during the evening of 26 April, crew exposureto this fallout is split about equally between the second and third badging periods--see table 3.1. The low potential for exposureis reflected in both the dosimetry data for RECLAIMERand calculated film badge doses for this ship during the period 13-27 April (figure 6.1). The last badging period for RECLAIMERstarts the day the ship returned to the contaminated northern lagoon following Shot UNIONto recover the Project 3.4 mines (28 April). Virtually the entire crew was badged during this period. A large majority of the film badges recorded doses of less than 500 mrem andare consistent with the calculated film badge dose for the typical crew of approximately 130 mrem (figure 6.1). The badges for nine individuals (identified previously) with doses greater than 700 mrem are not included in the figure. The significant difference in badge readings and the enlisted ratings of these personnelindicate that these men werelikely directly involved in handling the contaminated mines as they were hoisted aboard the ship; thus, the doses they received are not typical. 95