principally ionic rather than particulate. Detergents and ion-exchange carriers were ef- fective in removing some remaining activity. 6.2.7 Protection of Personnel in Radiation Fields. Since the operation of the ships and their subsequent decontamination involved the exposure of a large number of personnel to radiation, a number of studies were performed on personnel protection and dosimetry. In general, mission planning and survey readings wereeffective in limiting dosages to 100 4s ao} | s ne 32 igz E | ge -\t | 8 se wg g2 ik — H Em ——_— —_ —_ —_ —_ 3 S 2. 6S 2° oOo a + 8 f — — — A e - c — * ° 5 3 FLT DECK 2 S +2 €& D 5 5oo 40 a NOTE: $+ FH-HLJ-HS-FH PM A=HLJ-H° -FH BtHLU-mH. -HiJ C=FH-HS-FH HLy 1 1250 GAL/HR SELLERS INJECTOR 1 95 PER CENT CONFIDENCE INTERVAL 20 0 i 1 2 3 Man Hous / 1000 Sq. Ft Figure 6.6 Evaluation of experimental decontamination procedures, YAG~40, Shot 2. safe amounts. A system of zoning, with check points and provisions for clothing changes between, prevented the spread of contamination. A study of a special multiple~-shield film-badge holder revealed that combination beta-gamma dosimetry was valuable, but 87