CHAPTER 5 GAMMA-DOSE RATES { Gamma-dose rates at 3 ft above ground were determined with AN/PDR 27 C survey meters. Specific locations which had been monitored on earlier surveys were resurveyed whenever they could be located. General surveys were run on all islands. A linearity calibration was carried out on the instruments with a 93.53-~mg Ra source.” Low intensity Cs}3? standards were carried in the field in order to maintain a continual check on the behavior of the instruments. 5.1 RESULTS AND DISCUSSION 5.1.1. . General Surveys Table 5.1 contains the gamma-dose rates found on the islands surveyed, These data are reported as of 11 months post-detonation. TABLE 5.1 Average Gamma-dose Rates on Islands Atoll Likiep Utirik Gixar Gaimma-dose Rate (mr/t at 3 ft) Rowgeri Likiep Utirik Boar Eniwetak 0,04 0.14 0.27 Rongelap Rougelap 9.7 Rorigeiap Buse 0.8 Rougelap Roagelap Enaetok Labaredj 2.4 3.0 Rongelap Ka belle 4.2 Rorgelap Lukuen 4.8 Rongeiap Ge jen 0.4 Rongelap * T5land Lomuilal 0.7 5.8 Made available by the Radiological Safety Section, Atemic Energy Commission, at the Pacific Proviag v8 Grounds. _23- >’ “ee fol .¥ oy